ai.nullary/nullary - MCP Verify

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ai.nullary/nullary

Negative results intelligence for drug discovery — query measured failures via MCP.

JSON report • Policy • Badge metadata • History API • • Global feed

Decision: Allow with approval

Why: write/admin actions need confirmation safeguards + high-risk tools need review

Next: export policy, require approval for writes, add authenticated validation

EXECUTIVE VERDICT

Executive verdict

Production trust decision: Allow with approval

Reason: write/admin actions need confirmation safeguards + high-risk tools need review

Next action: export policy, require approval for writes, add authenticated validation

Production decision

Allow with approval

write/admin actions need confirmation safeguards + high-risk tools need review

Current score

76.0

Snapshot trustsnap_f47332e6dd3a2623

Next action

export policy, require approval for writes, add authenticated validation

Claim the profile to add evidence, trigger validation, and configure monitoring.

Compare alternatives Export policy Open report JSON

Evidence Tool risk Compatibility Policy History Badge Raw report

Status

Healthy

Score

76.0

Transport

streamable-http

Tools

Current trust snapshot

Snapshot ID

trustsnap_f47332e6dd3a2623

Use this ID to compare server page, report, policy, MCP, homepage, ranking, and shortlist surfaces.

Snapshot generated

May 27, 2026 03:44:02 AM UTC

All page, report, policy, and MCP surfaces use this same server-detail snapshot shape.

Last validated

May 27, 2026 12:49:40 AM UTC

Age: 2.91h • freshness band: Verified in last 24h • display score: 75.97

Production trust decision

Allow with approval

write/admin actions need confirmation safeguards + high-risk tools need review

Readiness class

Safe for evaluation

The server is suitable for evaluation, but remaining gaps should be resolved before broad production use.

Canonical machine links

Report JSON

/v1/servers/ai.nullary/nullary/report

Policy export

/v1/servers/ai.nullary/nullary/policy

Badge metadata

/v1/servers/ai.nullary/nullary/badge

Evidence pack

/v1/servers/ai.nullary/nullary/ledger

Compare URL

/compare?server=ai.nullary%2Fnullary

SERVER OWNER FUNNEL

Own this MCP?

Claim ownership, prove control with a GitHub, DNS, HTTP, MCP metadata, or email-domain challenge, revalidate now, publish a badge, configure monitoring, and unlock a verified server profile.

1. Claim

unclaimed

with GitHub, DNS, or HTTP challenge instructions.

2. Revalidate

POST /v1/servers/ai.nullary/nullary/revalidate

Verified owners get priority queueing after proof succeeds.

3. Badge

Verified by MCP Verify - score 76.0 - last checked May 27, 2026

4. Monitor

Continuous Verify plan is self-serve: choose a tier, configure watches, add authenticated validation, trigger revalidation, and use the badge.

Paid profile

Verified Server Profile

Add verified publisher identity, security metadata, evidence packs, badge customization, and owner analytics without buying a better score.

Badge embed

[![Verified by MCP Verify](https://verify.sentinelsignal.io/badge/ai.nullary/nullary.svg)](https://verify.sentinelsignal.io/servers/ai.nullary/nullary)

MCP TrustOps

TrustOps turns this report into operational controls: freshness SLAs, authenticated validation, semantic benchmarks, policy exports, alert subscriptions, badges, cost/compliance metadata, and runtime routing. Fresh trusted index decisions stay separate from long-tail inventory so stale scores do not masquerade as current evidence.

Freshness band

Verified in last 24h

Policy SLA: 168.0h • confidence-weighted score: 60.8 • stale score suppressed: ✕

Policy exports

Export policy

Formats: json, rego, yaml, github_action, gateway_config, client_report

Runtime routing

/v1/decide

Returns allowed tools, blocked tools, approval requirement, and reason.

Hosted runtime

Verify Hosted MCP

Deploy trusted servers from GitHub with secrets, egress controls, releases, rollback, and audit events.

Authenticated validation

Premium publisher feature: paid authenticated runs verify scopes, write-action safeguards, and authorized tool execution.

Active trust badges

Freshly Validated Claude Remote MCP Compatible No Critical Risk

Semantic benchmarks

available

Templates cover GitHub, database, healthcare, web search, and CRM least-privilege jobs.

Supply chain

metadata signal

Deep scan checks are marked separately from public metadata signals.

Compliance metadata

Terms, privacy, SOC 2, HIPAA, GDPR, retention, deletion, and audit-log fields are tracked as enterprise metadata.

Alert subscription types

Status changes Score drops or recovers Freshness SLA breach Validation schema drift OAuth or auth behavior changes Tool surface changes New or changed write tool Supply-chain signal changes Legal or compliance metadata changes

MCP Runtime hosting

Verify Hosted MCP turns a trusted server report into a managed remote MCP endpoint with GitHub deployment provenance, sandbox policy, encrypted secrets, release history, rollback, and audit/usage events.

Activation readiness

✓

Trusted hosted runtimes require fresh validation, a passing server state, a remote endpoint, and a minimum score.

Minimum tier

TrustOps

Publisher claim plus paid TrustOps tier are required before secrets or releases can be created.

Hosted endpoint

/hosted/{namespace}/{name}/mcp

The endpoint enforces egress allowlists and records audit/usage events.

Blockers

none

Deployment	Status	Endpoint	Release
No hosted runtime deployments yet.

Production readiness class

Safe for evaluation

The server is suitable for evaluation, but remaining gaps should be resolved before broad production use.

Critical alerts

Production verdicts degrade quickly when critical alerts are active.

Evidence confidence

Confidence score

80.0

Based on 4 recent validations, 26 captured checks, and validation age of 2.9 hours.

Live checks captured

More direct checks increase trust in the current verdict.

Validation age

2.9h

Lower age means fresher evidence.

Recommended for

Claude Desktop

Claude Desktop is marked compatible with score 100.

Smithery

Smithery is marked compatible with score 100.

Generic Streamable HTTP

Generic Streamable HTTP is marked compatible with score 100.

Client compatibility verdicts

Client compatibility only means the server shape can work with a client. Production trust decision and write-action publishing are evaluated separately so a client-compatible server can still be blocked for production.

Client compatibility: ChatGPT

Partially client-compatible

OpenAI connectors expect OAuth for remote server auth.; Dynamic client registration materially improves connector setup.

Confidence: high (80.0)

Evidence provenance

Winner: live_validation

Supporting sources: live_validation, history, server_card

Disagreements: none

initialize • OK
tools_list • OK
transport_compliance_probe • Warning
step_up_auth_probe • Missing
connector_replay_probe • OK — Frozen tool snapshots must survive refresh.
request_association_probe • Missing — Roots, sampling, and elicitation should stay request-scoped.

Client compatibility: Claude

Client-compatible

No major blockers detected.

Confidence: high (80.0)

Evidence provenance

Winner: live_validation

Supporting sources: live_validation, history, server_card

Disagreements: none

initialize • OK
tools_list • OK
transport_compliance_probe • Warning

Write-action publishing

Publishing blocked

Blocked until safeguards and confirmation semantics are verified for write, exec, or destructive tools.

Confidence: high (80.0)

Evidence provenance

Winner: live_validation

Supporting sources: live_validation, history

Disagreements: none

action_safety_probe • Error

Snapshot churn risk

Low

No material tool-surface churn detected in the latest comparison.

Confidence: high (80.0)

Evidence provenance

Winner: history

Supporting sources: history, live_validation

Disagreements: none

tool_snapshot_probe • OK
connector_replay_probe • OK

Why compatibility is limited by client

ChatGPT custom connector

Partially client-compatible

Remediation checklist

OpenAI connectors expect OAuth for remote server auth.
Dynamic client registration materially improves connector setup.
search fetch only is not yet satisfied
oauth configured is not yet satisfied
admin refresh required is not yet satisfied
safe for company knowledge is not yet satisfied

Claude remote MCP

Client-compatible

Remediation checklist

search fetch only is not yet satisfied
oauth configured is not yet satisfied
admin refresh required is not yet satisfied
safe for company knowledge is not yet satisfied
safe for messages api remote mcp is not yet satisfied
Transport compliance issues should be resolved before wider client rollout.

Write-safe publishing

Blocked

Remediation checklist

Add a clearer auth boundary around risky write actions.
Add confirmation or dry-run semantics for risky actions.

Verdict traces

Production verdict

Safe for evaluation

The server is suitable for evaluation, but remaining gaps should be resolved before broad production use.

Confidence: high (80.0)

Winning source: live_validation

Triggering alerts

No active alert triggers.

Client verdict trace table

Verdict	Status	Checks	Winning source	Conflicts
`openai_connectors`	Partially client-compatible	initialize, tools_list, transport_compliance_probe, step_up_auth_probe, connector_replay_probe, request_association_probe	live_validation	none
`claude_desktop`	Client-compatible	initialize, tools_list, transport_compliance_probe	live_validation	none
`unsafe_for_write_actions`	Publishing blocked	action_safety_probe	live_validation	none
`snapshot_churn_risk`	Low	tool_snapshot_probe, connector_replay_probe	history	none

Publishability policy profiles

ChatGPT custom connector compatibility

Compatible with review

OpenAI connectors expect OAuth for remote server auth.; Dynamic client registration materially improves connector setup. Compatibility is not a production approval; company knowledge and Messages API gates remain separate.

Search Fetch Only: No
Write Actions Present: Yes
Oauth Configured: No
Admin Refresh Required: No
Safe For Company Knowledge: No
Safe For Messages Api Remote Mcp: No

Claude remote MCP compatibility

Connector-compatible

Transport, discovery, and remote-MCP assumptions are satisfied. Compatibility is not a production approval; company knowledge and Messages API gates remain separate.

Search Fetch Only: No
Write Actions Present: Yes
Oauth Configured: No
Admin Refresh Required: No
Safe For Company Knowledge: No
Safe For Messages Api Remote Mcp: No

Compatibility fixtures

ChatGPT custom connector fixture

Degraded

OpenAI connectors expect OAuth for remote server auth.; Dynamic client registration materially improves connector setup.

remote_http_endpoint: Passes
oauth_discovery: Degraded
frozen_tool_snapshot_refresh: Passes
request_association: Passes

Anthropic remote MCP fixture

Passes

Remote MCP transport and discovery assumptions are satisfied.

remote_transport: Passes
tool_discovery: Passes
auth_connect: Passes
safe_write_review: Degraded

Authenticated validation sessions

Public validation is free. Authenticated validation is paid and proves scoped behavior, write-action safeguards, and authenticated tool execution.

Latest profile

remote_mcp

Authenticated session used

Public score isolation

✓

Preview endpoint

/v1/verify

CI preview endpoint

/v1/ci/preview

Public server reputation

Validation success 7d

1.0

Validation success 30d

1.0

Mean time to recover

n/a

Breaking diffs 30d

Registry drift frequency 30d

Snapshot changes 30d

Incident & change feed

Timestamp	Event	Details
May 27, 2026 12:49:40 AM UTC	Latest validation: healthy	Score 76.0 with status healthy.
May 27, 2026 12:49:40 AM UTC	Score changed	Score delta -0.4 versus the previous run.
May 26, 2026 12:49:15 PM UTC	Score changed	Score delta +2.3 versus the previous run.
May 26, 2026 12:49:15 PM UTC	Tool snapshot changed	Added 25, removed 0, and changed 0 tool contracts.
May 26, 2026 12:49:15 PM UTC	Auth mode changed	Auth mode moved from unknown to public.
May 26, 2026 12:39:02 AM UTC	Score changed	Score delta +4.2 versus the previous run.

Capabilities

OAuth: ✕
DCR/CIMD: ✕
Prompts: ✕
Homepage: none
Docs: none
Support: none
Icon: none
Remote endpoint: https://mcp.nullary.ai/mcp
Server card: none

Use-case taxonomy

development database search files

Security posture

Tools analyzed

High-risk tools

Destructive tools

Exec tools

Egress tools

Secret tools

Bulk-access tools

Risk distribution

low:3, medium:7, high:25

Tool capability & risk inventory

Tool	Capabilities	Risk	Findings	Notes
`search_inactive_compounds`	read write network export	High	arbitrary network egress bulk data access freeform input surface	Safeguards hinted in metadata.
`search_failed_selectivity`	read write network export	High	arbitrary network egress bulk data access freeform input surface	Safeguards hinted in metadata.
`search_admet_failures`	read write network export	High	arbitrary network egress bulk data access freeform input surface	Safeguards hinted in metadata.
`search_failed_guides`	read write network export	High	arbitrary network egress bulk data access freeform input surface	Safeguards hinted in metadata.
`search_failed_essentiality_screens`	read write network export	High	arbitrary network egress bulk data access freeform input surface	Safeguards hinted in metadata.
`search_ancestry_specific_failures`	read write network export	High	arbitrary network egress bulk data access freeform input surface	Safeguards hinted in metadata.
`search_developability_failures`	read write network export	High	arbitrary network egress bulk data access freeform input surface	Safeguards hinted in metadata.
`search_failed_clinical_antibodies`	read write network export	High	arbitrary network egress bulk data access freeform input surface	Safeguards hinted in metadata.
`search_failed_peptide_therapeutics`	read write network export	High	arbitrary network egress bulk data access freeform input surface	Safeguards hinted in metadata.
`search_peptide_stability_issues`	read write network export	High	arbitrary network egress bulk data access freeform input surface	Safeguards hinted in metadata.
`search_failed_protacs`	read write network export	High	arbitrary network egress bulk data access freeform input surface	Safeguards hinted in metadata.
`search_protac_e3_issues`	read write network export	High	arbitrary network egress bulk data access freeform input surface	Safeguards hinted in metadata.
`search_failed_oligonucleotides`	read write network export	High	arbitrary network egress bulk data access freeform input surface	Safeguards hinted in metadata.
`search_oligo_delivery_failures`	read write network export	High	arbitrary network egress bulk data access freeform input surface	Safeguards hinted in metadata.
`search_failed_vaccines`	read write network filesystem export	High	arbitrary network egress bulk data access freeform input surface filesystem mutation	Safeguards hinted in metadata.
`search_vaccine_immunogenicity_failures`	read write network export	High	arbitrary network egress bulk data access freeform input surface	Safeguards hinted in metadata.
`search_failed_adcs`	read write network export	High	arbitrary network egress bulk data access freeform input surface	Safeguards hinted in metadata.
`search_adc_linker_failures`	read write network export	High	arbitrary network egress bulk data access freeform input surface	Safeguards hinted in metadata.
`search_failed_bispecifics`	read write network export	High	arbitrary network egress bulk data access freeform input surface	Safeguards hinted in metadata.
`search_bispecific_format_failures`	read write network export	High	arbitrary network egress bulk data access freeform input surface	Safeguards hinted in metadata.
`search_admet_failures_all_modalities`	read write network export	High	arbitrary network egress bulk data access freeform input surface	Safeguards hinted in metadata.
`search_drug_drug_interaction_failures`	read write export	Medium	bulk data access	Safeguards hinted in metadata.
`search_mechanism_failures`	read write network export	High	arbitrary network egress bulk data access freeform input surface	Safeguards hinted in metadata.
`search_failed_replications`	read write network export	High	arbitrary network egress bulk data access freeform input surface	Safeguards hinted in metadata.
`search_safety_failures`	read write network export	High	arbitrary network egress bulk data access freeform input surface	Safeguards hinted in metadata.
`search_target_history`	read write network export	High	arbitrary network egress bulk data access freeform input surface	Safeguards hinted in metadata.
`search_indication_history`	read write export	Medium	bulk data access	Safeguards hinted in metadata.
`search_pathogen_history`	read write filesystem export	Medium	bulk data access freeform input surface filesystem mutation	Safeguards hinted in metadata.
`get_compound`	read write filesystem export	Medium	bulk data access filesystem mutation	Safeguards hinted in metadata.
`get_finding_provenance`	read	Low	none	No explicit safeguard hints detected.
`get_target_landscape`	read network	Medium	arbitrary network egress freeform input surface	No explicit safeguard hints detected.
`list_top_targets`	read export	Medium	bulk data access	No explicit safeguard hints detected.
`list_models`	read	Low	none	No explicit safeguard hints detected.
`get_model_card`	read network	Medium	arbitrary network egress freeform input surface	No explicit safeguard hints detected.
`get_coverage`	read	Low	none	No explicit safeguard hints detected.

Write-action governance

Governance status

Error

Safe to publish

Auth boundary

public_or_unclear

Blast radius

High

High-risk tools

Confirmation signals

none

Safeguard count

Status detail: 25 high-risk tool(s) are exposed without a clear auth boundary; 29 safeguard(s) and 0 confirmation signal(s) detected.

Tool	Risk	Flags	Safeguards
`search_inactive_compounds`	High	arbitrary network egress bulk data access freeform input surface	yes
`search_failed_selectivity`	High	arbitrary network egress bulk data access freeform input surface	yes
`search_admet_failures`	High	arbitrary network egress bulk data access freeform input surface	yes
`search_failed_guides`	High	arbitrary network egress bulk data access freeform input surface	yes
`search_failed_essentiality_screens`	High	arbitrary network egress bulk data access freeform input surface	yes
`search_ancestry_specific_failures`	High	arbitrary network egress bulk data access freeform input surface	yes
`search_developability_failures`	High	arbitrary network egress bulk data access freeform input surface	yes
`search_failed_clinical_antibodies`	High	arbitrary network egress bulk data access freeform input surface	yes
`search_failed_peptide_therapeutics`	High	arbitrary network egress bulk data access freeform input surface	yes
`search_peptide_stability_issues`	High	arbitrary network egress bulk data access freeform input surface	yes
`search_failed_protacs`	High	arbitrary network egress bulk data access freeform input surface	yes
`search_protac_e3_issues`	High	arbitrary network egress bulk data access freeform input surface	yes
`search_failed_oligonucleotides`	High	arbitrary network egress bulk data access freeform input surface	yes
`search_oligo_delivery_failures`	High	arbitrary network egress bulk data access freeform input surface	yes
`search_failed_vaccines`	High	arbitrary network egress bulk data access freeform input surface filesystem mutation	yes
`search_vaccine_immunogenicity_failures`	High	arbitrary network egress bulk data access freeform input surface	yes
`search_failed_adcs`	High	arbitrary network egress bulk data access freeform input surface	yes
`search_adc_linker_failures`	High	arbitrary network egress bulk data access freeform input surface	yes
`search_failed_bispecifics`	High	arbitrary network egress bulk data access freeform input surface	yes
`search_bispecific_format_failures`	High	arbitrary network egress bulk data access freeform input surface	yes

Action-controls diff

Snapshot changed

Disabled-by-default candidates

none

Manual review candidates

none

New actions

Action	Risk	Flags
No newly added actions.

Changed actions

Action	Change types	Risk
No materially changed actions.

Why this score?

Access & Protocol

32/44

Connectivity, auth, and transport expectations for common clients.

Interface Quality

40.4/56

How well the tool/resource interface communicates and behaves under automation.

Security Posture

27/36

How safely the exposed tool surface handles destructive actions, egress, execution, secrets, and risky inputs.

Reliability & Trust

22/24

Operational stability, consistency, and trustworthiness over time.

Discovery & Governance

22.5/28

How well the server is documented, listed, and governed in public registries.

Adoption & Market

5/8

Adoption clues and public evidence that the server is intended for external use.

Algorithmic score breakdown

Auth Operability

2/4

Measures whether auth discovery and protected access behave predictably for clients.

Error Contract Quality

3.4/4

Grades machine-readable error structure, status alignment, and remediation hints.

Rate-Limit Semantics

2/4

Checks whether quota/throttle responses are deterministic and automation-friendly.

Schema Completeness

3/4

Completeness of tool descriptions, parameter docs, examples, and schema shape.

Backward Compatibility

4/4

Stability score across tool schema/name drift relative to prior validations.

SLO Health

4/4

Availability, latency, and burst-failure profile across recent validation history.

Security Hygiene

2/4

HTTPS posture, endpoint hygiene, and response-surface hardening checks.

Task Success

4/4

Can an agent reliably initialize, enumerate tools, and execute core MCP flows?

Trust Confidence

2/4

Confidence-adjusted reliability score that penalizes low evidence volume.

Abuse/Noise Resilience

4/4

How well the server preserves core behavior in the presence of noisy traffic patterns.

Prompt Contract

2/4

Quality of prompt metadata, argument shape, and prompt discoverability for clients.

Resource Contract

2/4

How completely resources and resource templates describe URIs, types, and usage shape.

Discovery Metadata

3/4

Homepage, docs, icon, repository, support, and license coverage for directory consumers.

Registry Consistency

2/4

Agreement between stored registry metadata, live server-card data, and current validation output.

Installability

4/4

How cleanly a real client can connect, initialize, enumerate tools, and proceed through auth.

Session Semantics

4/4

Determinism and state behavior across repeated MCP calls, including sticky-session surprises.

Tool Surface Design

4/4

Naming clarity, schema ergonomics, and parameter complexity across the tool surface.

Result Shape Stability

4/4

Stability of declared output schemas across validations, with penalties for drift or missing shapes.

OAuth Interop

3/4

Depth and client compatibility of OAuth/OIDC metadata beyond the minimal protected-resource check.

Recovery Semantics

0/4

Whether failures include actionable machine-readable next steps such as retry or upgrade guidance.

Maintenance Signal

3/4

Versioning, update recency, and historical validation cadence that indicate active stewardship.

Adoption Signal

2/4

Directory presence and distribution clues that suggest the server is intended for external use.

Freshness Confidence

4/4

Confidence that recent validations are current enough and dense enough to trust operationally.

Transport Fidelity

4/4

Whether declared transport metadata matches the observed endpoint behavior and response formats.

Spec Recency

2/4

How close the server’s claimed MCP protocol version is to the latest known public revision.

Session Resume

3/4

Whether Streamable HTTP session identifiers and resumed requests behave cleanly for real clients.

Step-Up Auth

3/4

Whether OAuth metadata and WWW-Authenticate challenges support granular, incremental consent instead of broad upfront scopes.

Transport Compliance

2/4

Checks session headers, protocol-version enforcement, session teardown, and expired-session behavior.

Utility Coverage

2/4

Signals support for completions, pagination, and task-oriented utility surfaces that larger clients increasingly expect.

Advanced Capability Coverage

2/4

Coverage of newer MCP surfaces like roots, sampling, elicitation, structured output, and related metadata.

Connector Publishability

3/4

How ready the server looks for client catalogs and managed connector programs.

Tool Snapshot Churn

4/4

Stability of the tool surface across recent validations, including add/remove and output-shape drift.

Connector Replay

4/4

Whether a previously published frozen connector snapshot would remain backward compatible after the latest tool refresh.

Request Association

3/4

Whether roots, sampling, and elicitation appear tied to active client requests instead of arriving unsolicited on idle sessions.

Interactive Flow Safety

3/4

Whether prompts and docs steer users toward safe auth flows instead of pasting secrets directly.

Action Safety

2/4

Risk-weighted view of destructive, exec, egress, and confirmation semantics across the tool surface.

Official Registry Presence

4/4

Whether the server appears directly or indirectly in the official MCP registry.

Provenance Divergence

4/4

How closely official registry metadata, the live server card, and public repo/package signals agree with each other.

Safety Transparency

4/4

Clarity of docs, auth disclosure, support links, and other trust signals visible to integrators.

Tool Capability Clarity

4/4

How clearly the tool surface communicates whether each action reads, writes, deletes, executes, or exports data.

Destructive Operation Safety

3/4

Penalizes delete/revoke/destroy style tools unless auth and safeguards reduce blast radius.

Egress / SSRF Resilience

3/4

Assesses arbitrary URL fetch, crawl, webhook, and remote-request exposure on the tool surface.

Execution / Sandbox Safety

4/4

Evaluates shell, code, script, and command-execution exposure and whether that surface appears contained.

Data Exfiltration Resilience

4/4

Assesses export, dump, backup, and bulk-read behavior against the surrounding auth and safeguard signals.

Least Privilege Scope

2/4

Rewards scoped auth metadata and penalizes broad or missing scopes around privileged tools.

Secret Handling Hygiene

3/4

Assesses secret-bearing tools, token leakage risk, and whether the public surface avoids obvious secret exposure.

Supply Chain Signal

2.5/4

Public metadata signal for repository, changelog, license, versioning, and recency that supports supply-chain trust.

Input Sanitization Safety

3/4

Penalizes risky freeform string inputs when schemas do not constrain URLs, code, paths, queries, or templates.

Tool Namespace Clarity

4/4

Measures naming uniqueness and ambiguity across the tool namespace to reduce collision and confusion risk.

Compatibility profiles

OpenAI Connectors

77.8

partial

OpenAI connectors expect OAuth for remote server auth.; Dynamic client registration materially improves connector setup.

Connector URL: https://mcp.nullary.ai/mcp
# No OAuth metadata detected.
# Server: ai.nullary/nullary

Claude Desktop

100.0

compatible

No major blockers detected.

{
  "mcpServers": {
    "nullary": {
      "command": "npx",
      "args": ["mcp-remote", "https://mcp.nullary.ai/mcp"]
    }
  }
}

Smithery

100.0

compatible

No major blockers detected.

smithery mcp add "https://mcp.nullary.ai/mcp"

Generic Streamable HTTP

100.0

compatible

No major blockers detected.

curl -sS https://mcp.nullary.ai/mcp -H 'content-type: application/json' -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2025-03-26","capabilities":{},"clientInfo":{"name":"mcp-verify","version":"0.1.0"}}}'

Actionable remediation

Severity	Remediation	Why it matters	Recommended action
High	Add confirmation and dry-run semantics for risky actions	High-risk write, delete, exec, or egress tools should communicate safeguards clearly.	Inspect the latest validation evidence and resolve the client-visible regression. Playbook Inspect the latest validation evidence. Resolve the highest-severity client-facing gap first. Revalidate and confirm the score and verdict improve.
High	Align session and protocol behavior with Streamable HTTP expectations	Clients increasingly rely on MCP-Protocol-Version, session teardown, and expired-session semantics.	Align MCP-Protocol-Version, MCP-Session-Id, DELETE teardown, and expired-session handling with the transport spec. Playbook Return `Mcp-Session-Id` and `Mcp-Protocol-Version` headers consistently on streamable HTTP responses. Honor `DELETE` session teardown and return `404` when a deleted session is reused. Reject invalid protocol-version headers with `400 Bad Request`.
High	Associate roots, sampling, and elicitation with active client requests	Modern MCP guidance expects roots, sampling, and elicitation traffic to be tied to an active client request instead of arriving unsolicited on idle sessions.	Inspect the latest validation evidence and resolve the client-visible regression. Playbook Inspect the latest validation evidence. Resolve the highest-severity client-facing gap first. Revalidate and confirm the score and verdict improve.
High	Expose /.well-known/oauth-protected-resource	Without a protected-resource document, OAuth clients cannot discover auth requirements reliably.	Serve /.well-known/oauth-protected-resource and point it at your authorization server metadata. Playbook Serve `/.well-known/oauth-protected-resource` from the same host as the MCP endpoint. Point it at the authorization server metadata URL. Confirm clients receive consistent auth hints before tool execution.
High	Publish OAuth authorization-server metadata	Clients need authorization-server metadata to discover issuer, endpoints, and DCR support.	Publish /.well-known/oauth-authorization-server from your issuer and include registration_endpoint when supported. Playbook Publish `/.well-known/oauth-authorization-server` from the issuer. Add `registration_endpoint` if DCR is supported. Verify issuer, authorization, token, and jwks metadata are all reachable.
High	Publish a complete server card	Missing or incomplete server-card metadata weakens discovery, documentation, and trust signals.	Serve /.well-known/mcp/server-card.json and include tools, prompts/resources, homepage, and support links. Playbook Publish `/.well-known/mcp/server-card.json`. Include homepage, repository, support, tools, prompts/resources, and auth metadata. Revalidate the server after publishing the card.
High	Stop asking users to paste secrets directly	Public MCP servers should prefer OAuth or browser-based auth guidance over in-band secret collection.	Inspect the latest validation evidence and resolve the client-visible regression. Playbook Inspect the latest validation evidence. Resolve the highest-severity client-facing gap first. Revalidate and confirm the score and verdict improve.
Medium	Adopt a current MCP protocol revision	Older protocol revisions reduce compatibility with newer clients and registry programs.	Inspect the latest validation evidence and resolve the client-visible regression. Playbook Inspect the latest validation evidence. Resolve the highest-severity client-facing gap first. Revalidate and confirm the score and verdict improve.
Medium	Close connector-publishing gaps	Connector catalogs care about protocol recency, session behavior, auth clarity, and tool-surface stability.	Inspect the latest validation evidence and resolve the client-visible regression. Playbook Inspect the latest validation evidence. Resolve the highest-severity client-facing gap first. Revalidate and confirm the score and verdict improve.
Medium	Document minimal scopes and return cleaner auth challenges	Modern clients expect granular scopes and step-up auth signals such as WWW-Authenticate scope hints.	Return granular scopes and WWW-Authenticate challenge hints instead of forcing overly broad auth upfront. Playbook Advertise the narrowest viable scopes in OAuth metadata. Return `WWW-Authenticate` challenges with scope or insufficient-scope hints when additional consent is needed. Revalidate with both public discovery and auth-required flows.
Medium	Publish OpenID configuration	OIDC metadata improves token validation and client compatibility.	Expose /.well-known/openid-configuration with issuer, jwks_uri, and supported grants. Playbook Inspect the latest validation evidence. Resolve the highest-severity client-facing gap first. Revalidate and confirm the score and verdict improve.
Medium	Repair prompts/list or stop advertising prompts	Prompt metadata should either work live or be removed from the advertised capability set.	Only advertise prompts if prompts/list works and prompt arguments are documented. Playbook Only advertise prompts that are actually accessible. Add prompt descriptions and argument docs. Run a live `prompts/list` check after any prompt changes.
Medium	Repair resources/list or stop advertising resources	Resource metadata should either work live or be removed from the advertised capability set.	Only advertise resources if resources/list works and resources expose stable URIs/types. Playbook Only advertise resources with stable URIs and read semantics. Add MIME/type hints where possible. Run a live `resources/list` and `resources/read` check after updates.
Medium	Support resumable HTTP sessions cleanly	Modern MCP clients increasingly expect resumable session behavior on streamable HTTP transports.	Inspect the latest validation evidence and resolve the client-visible regression. Playbook Inspect the latest validation evidence. Resolve the highest-severity client-facing gap first. Revalidate and confirm the score and verdict improve.
Low	Expose modern utility surfaces like completions, pagination, or tasks	Utility coverage improves interoperability with larger clients and long-lived agent workflows.	Expose completions, pagination, and task metadata where supported so larger clients can plan and resume work safely. Playbook Advertise `completions`, pagination cursors, and `tasks` only when they are actually supported. Return `nextCursor` on large list operations when pagination is available. Document task support and whether it requires step-up auth.
Low	Publish newer MCP capability signals	Roots, sampling, elicitation, structured outputs, and related metadata improve client understanding and ranking.	Inspect the latest validation evidence and resolve the client-visible regression. Playbook Inspect the latest validation evidence. Resolve the highest-severity client-facing gap first. Revalidate and confirm the score and verdict improve.

Point loss breakdown

Component	Current	Points missing
Recovery Semantics	0/4	-4.0
Utility Coverage	2/4	-2.0
Trust Confidence	2/4	-2.0
Transport Compliance	2/4	-2.0
Spec Recency	2/4	-2.0
Security Hygiene	2/4	-2.0
Resource Contract	2/4	-2.0
Registry Consistency	2/4	-2.0
Rate Limit Semantics	2/4	-2.0
Prompt Contract	2/4	-2.0
Least Privilege Scope	2/4	-2.0
Auth Operability	2/4	-2.0

Validation diff

Score delta

-0.41

Summary changed

Tool delta

Prompt delta

Auth mode changed

Write surface expanded

Protocol regressed

Registry drift changed

Regressed checks: none

Improved checks: none

Component	Previous	Latest	Delta
`trust_confidence_score`	3.81	2.0	-1.81
`freshness_confidence_score`	3.0	4.0	1.0

Tool snapshot diff & changelog

Snapshot changed

Added tools

none

Removed tools

none

Required-argument changes

Tool	Added required args	Removed required args
No required-argument changes detected.

Output-schema drift

Tool	Previous properties	Latest properties
No output-schema drift detected.

Connector replay

Status

Backward compatible

✓

Would break after refresh

Added tools

none

Removed tools

none

Additive output changes

none

Required-argument replay breaks

Tool	Added required args	Removed required args
No required-argument replay breaks detected.

Output-schema replay breaks

Tool	Removed properties	Added properties
No output-schema replay breaks detected.

Transport compliance drilldown

Probe status

Warning

Transport

streamable-http

Session header

Protocol header

Bad protocol response

400

DELETE teardown

n/a

Expired session retry

n/a

Last-Event-ID visible

Issues: missing_session_id, missing_protocol_header

Request association

Status

Missing

Advertised capabilities

none

Observed idle methods

none

Violating methods

none

Probe HTTP status

n/a

Issues

none

Utility coverage

Probe status

Missing

Completions

not detected

Completion probe target: none

Pagination

not detected

No nextCursor evidence.

Tasks

Missing

Advertised: no

Benchmark tasks

Benchmark task	Status	Evidence
Discover tools	Passes	`initialize` • OK `tools_list` • OK
Read-only fetch flow	Degraded	`resource_read` • Missing `read_only_tool_surface` • OK
OAuth-required connect	Degraded	`oauth_protected_resource` • Error `step_up_auth_probe` • Missing
Safe write flow with confirmation	Likely to fail	`action_safety_probe` • Error

Registry & provenance divergence

Probe status

Direct official match

yes

Drift fields

none

Field	Registry	Live server card
Title	n/a	n/a
Version	n/a	n/a
Homepage	n/a	n/a

Active alerts

No active alerts for the current server state.

Aliases & registry graph

Identifier	Source	Canonical	Score
`ai.nullary/nullary`	official_registry	yes	75.97

Alias consolidation

Canonical identifier

ai.nullary/nullary

Duplicate aliases

Registry sources

official_registry

Remote URLs

https://mcp.nullary.ai/mcp

Homepages

none

Source disagreements

Field	What differs	Observed values
No source disagreements detected.

Install snippets

Openai Connectors

Connector URL: https://mcp.nullary.ai/mcp
# No OAuth metadata detected.
# Server: ai.nullary/nullary

Claude Desktop

{
  "mcpServers": {
    "nullary": {
      "command": "npx",
      "args": ["mcp-remote", "https://mcp.nullary.ai/mcp"]
    }
  }
}

Smithery

smithery mcp add "https://mcp.nullary.ai/mcp"

Generic Http

curl -sS https://mcp.nullary.ai/mcp -H 'content-type: application/json' -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2025-03-26","capabilities":{},"clientInfo":{"name":"mcp-verify","version":"0.1.0"}}}'

Agent access & tool surface

Live server tools

search_inactive_compounds search_failed_selectivity search_admet_failures search_failed_guides search_failed_essentiality_screens search_ancestry_specific_failures search_developability_failures search_failed_clinical_antibodies

Observed from the latest live validation against https://mcp.nullary.ai/mcp. This is the target server surface, not Verify's own inspection tools.

Live capability counts

35 tools • 0 prompts • 0 resources

Counts come from the latest tools/list, prompts/list, and resources/list checks.

Inspect with Verify

search fetch search_servers recommend_servers get_server_report compare_servers

Use Verify itself to search, recommend, compare, and fetch the full report for ai.nullary/nullary.

Direct machine links

JSON report • Compare this server • Verify MCP API

Claims & monitoring

Server ownership

No verified maintainer claim recorded.

Watch subscriptions

Teams: none

Alert routing

Active watches

Generic webhooks

Slack routes

Teams routes

Email routes

Watch	Team	Channels	Minimum severity
No active watch destinations.

Maintainer analytics

Validation Run Count

Average Latency Ms

1529.99

Healthy Run Ratio Recent

1.0

Registry Presence Count

Active Alert Count

Watcher Count

Verified Claim

False

Taxonomy Tags

development, database, search, files

Score Trend

75.97, 76.38, 74.12, 69.97

Remediation Count

High Risk Tool Count

Destructive Tool Count

Exec Tool Count

Maintainer response quality

Score

16.67

Verified claim

Support contact

Changelog present

Incident notes present

Tool changes documented

✓

Annotation history

Annotation count

Maintainer annotations

No maintainer annotations have been recorded yet.

Maintainer rebuttals & expected behavior

No maintainer rebuttals or expected-behavior overrides are recorded yet.

Latest validation evidence

Latest summary

Healthy

Validation profile

remote_mcp

Started

May 27, 2026 12:49:39 AM UTC

Latency

617.2 ms

Failures

oauth_authorization_server no authorization server
oauth_protected_resource Client error '404 Not Found' for url 'https://mcp.nullary.ai/.well-known/oauth-protected-resource' For more information check: https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/404
openid_configuration no authorization server
server_card Client error '404 Not Found' for url 'https://mcp.nullary.ai/.well-known/mcp/server-card.json' For more information check: https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/404

Checks

Check	Status	Latency	Evidence
`action_safety_probe`	Error	n/a	25 high-risk tool(s); no clear auth boundary; safeguards=29; confirmation=none.
`advanced_capabilities_probe`	Warning	n/a	Only 1 capability signal(s): structured outputs.
`connector_publishability_probe`	Warning	n/a	Publishability blockers: action safety, server card.
`connector_replay_probe`	OK	n/a	Backward compatible with no breaking tool-surface changes.
`determinism_probe`	OK	28.9 ms	Check completed
`initialize`	OK	73.2 ms	Protocol 2025-03-26
`interactive_flow_probe`	Missing	n/a	Check completed
`oauth_authorization_server`	Missing	n/a	no authorization server
`oauth_protected_resource`	Error	36.8 ms	Client error '404 Not Found' for url 'https://mcp.nullary.ai/.well-known/oauth-protected-resource' For more information check: https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/404
`official_registry_probe`	OK	n/a	Check completed
`openid_configuration`	Missing	n/a	no authorization server
`probe_noise_resilience`	OK	27.3 ms	Fetched https://mcp.nullary.ai/robots.txt
`prompt_get`	Missing	n/a	not advertised
`prompts_list`	Missing	39.5 ms	not supported
`protocol_version_probe`	Warning	n/a	Claims 2025-03-26; 2 release(s) behind 2025-11-25.
`provenance_divergence_probe`	OK	n/a	Check completed
`request_association_probe`	Missing	n/a	No request-association capabilities were advertised.
`resource_read`	Missing	n/a	not advertised
`resources_list`	Missing	34.7 ms	not supported
`server_card`	Error	222.4 ms	Client error '404 Not Found' for url 'https://mcp.nullary.ai/.well-known/mcp/server-card.json' For more information check: https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/404
`session_resume_probe`	Warning	n/a	no session id
`step_up_auth_probe`	Missing	n/a	No OAuth or incremental-scope signals detected.
`tool_snapshot_probe`	OK	n/a	Check completed
`tools_list`	OK	40.9 ms	35 tool(s) exposed
`transport_compliance_probe`	Warning	36.5 ms	Issues: missing session id, missing protocol header (bad protocol=400).
`utility_coverage_probe`	Missing	20.0 ms	No completions evidence; no pagination evidence; tasks missing.

Raw evidence view

Show raw JSON evidence

{
  "checks": {
    "action_safety_probe": {
      "details": {
        "auth_present": false,
        "confirmation_signals": [],
        "safeguard_count": 29,
        "summary": {
          "bulk_access_tools": 30,
          "capability_distribution": {
            "export": 30,
            "filesystem": 3,
            "network": 27,
            "read": 35,
            "write": 29
          },
          "destructive_tools": 0,
          "egress_tools": 27,
          "exec_tools": 0,
          "high_risk_tools": 25,
          "risk_distribution": {
            "critical": 0,
            "high": 25,
            "low": 3,
            "medium": 7
          },
          "secret_tools": 0,
          "tool_count": 35
        }
      },
      "latency_ms": null,
      "status": "error"
    },
    "advanced_capabilities_probe": {
      "details": {
        "capabilities": {
          "completions": false,
          "elicitation": false,
          "prompts": false,
          "resource_links": false,
          "resources": false,
          "roots": false,
          "sampling": false,
          "structured_outputs": true
        },
        "enabled": [
          "structured_outputs"
        ],
        "enabled_count": 1,
        "initialize_capability_keys": [
          "tools"
        ]
      },
      "latency_ms": null,
      "status": "warning"
    },
    "connector_publishability_probe": {
      "details": {
        "blockers": [
          "action_safety",
          "server_card"
        ],
        "criteria": {
          "action_safety": false,
          "auth_flow": true,
          "connector_replay": true,
          "initialize": true,
          "protocol_version": true,
          "remote_transport": true,
          "request_association": true,
          "server_card": false,
          "session_resume": true,
          "step_up_auth": true,
          "tool_surface": true,
          "tools_list": true,
          "transport_compliance": true
        },
        "high_risk_tools": 25,
        "tool_count": 35,
        "transport": "streamable-http"
      },
      "latency_ms": null,
      "status": "warning"
    },
    "connector_replay_probe": {
      "details": {
        "added_tools": [],
        "additive_output_changes": [],
        "backward_compatible": true,
        "output_breaks": [],
        "removed_tools": [],
        "required_arg_breaks": [],
        "would_break_after_refresh": false
      },
      "latency_ms": null,
      "status": "ok"
    },
    "determinism_probe": {
      "details": {
        "attempts": 2,
        "baseline_signature": "a97698569e8e9caee6bfea28f5ed1e2fd31f8c805a23921ff9d3784c76e68d34",
        "errors": [],
        "matches": 2,
        "stable_ratio": 1.0,
        "successful": 2
      },
      "latency_ms": 28.87,
      "status": "ok"
    },
    "initialize": {
      "details": {
        "headers": {
          "content-type": "text/event-stream",
          "strict-transport-security": "max-age=63072000"
        },
        "http_status": 200,
        "payload": {
          "id": 1,
          "jsonrpc": "2.0",
          "result": {
            "capabilities": {
              "tools": {}
            },
            "instructions": "Nullary serves negative results from drug discovery \u2014 failed compounds, terminated trials, failed CRISPR screens, antibody developability failures, and more. Search is organized by modality; every result carries provenance.",
            "protocolVersion": "2025-03-26",
            "serverInfo": {
              "icons": [
                {
                  "mimeType": "image/svg+xml",
                  "sizes": [
                    "any"
                  ],
                  "src": "https://nullary.ai/icon.svg"
                },
                {
                  "mimeType": "image/png",
                  "sizes": [
                    "180x180"
                  ],
                  "src": "https://nullary.ai/apple-icon"
                }
              ],
              "name": "Nullary",
              "version": "1.0.1"
            }
          }
        },
        "url": "https://mcp.nullary.ai/mcp"
      },
      "latency_ms": 73.21,
      "status": "ok"
    },
    "interactive_flow_probe": {
      "details": {
        "oauth_supported": false,
        "prompt_available": false,
        "risk_hits": [],
        "safe_hits": []
      },
      "latency_ms": null,
      "status": "missing"
    },
    "oauth_authorization_server": {
      "details": {
        "reason": "no_authorization_server"
      },
      "latency_ms": null,
      "status": "missing"
    },
    "oauth_protected_resource": {
      "details": {
        "error": "Client error '404 Not Found' for url 'https://mcp.nullary.ai/.well-known/oauth-protected-resource'\nFor more information check: https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/404",
        "url": "https://mcp.nullary.ai/.well-known/oauth-protected-resource"
      },
      "latency_ms": 36.81,
      "status": "error"
    },
    "official_registry_probe": {
      "details": {
        "direct_match": true,
        "official_peer_count": 1,
        "registry_identifier": "ai.nullary/nullary",
        "registry_source": "official_registry"
      },
      "latency_ms": null,
      "status": "ok"
    },
    "openid_configuration": {
      "details": {
        "reason": "no_authorization_server"
      },
      "latency_ms": null,
      "status": "missing"
    },
    "probe_noise_resilience": {
      "details": {
        "headers": {
          "content-type": "text/html; charset=utf-8",
          "strict-transport-security": "max-age=63072000"
        },
        "http_status": 404,
        "url": "https://mcp.nullary.ai/robots.txt"
      },
      "latency_ms": 27.32,
      "status": "ok"
    },
    "prompt_get": {
      "details": {
        "reason": "not_advertised"
      },
      "latency_ms": null,
      "status": "missing"
    },
    "prompts_list": {
      "details": {
        "headers": {
          "content-type": "text/event-stream",
          "strict-transport-security": "max-age=63072000"
        },
        "http_status": 200,
        "payload": {
          "error": {
            "code": -32601,
            "message": "Method not found"
          },
          "id": 3,
          "jsonrpc": "2.0"
        },
        "reason": "not_supported",
        "url": "https://mcp.nullary.ai/mcp"
      },
      "latency_ms": 39.54,
      "status": "missing"
    },
    "protocol_version_probe": {
      "details": {
        "claimed_version": "2025-03-26",
        "lag_days": 244,
        "latest_known_version": "2025-11-25",
        "releases_behind": 2,
        "validator_protocol_version": "2025-03-26"
      },
      "latency_ms": null,
      "status": "warning"
    },
    "provenance_divergence_probe": {
      "details": {
        "direct_official_match": true,
        "drift_fields": [],
        "metadata_document_count": 1,
        "registry_homepage": null,
        "registry_repository": null,
        "registry_title": null,
        "registry_version": null,
        "server_card_homepage": null,
        "server_card_repository": null,
        "server_card_title": null,
        "server_card_version": null
      },
      "latency_ms": null,
      "status": "ok"
    },
    "request_association_probe": {
      "details": {
        "reason": "no_request_association_capabilities_advertised"
      },
      "latency_ms": null,
      "status": "missing"
    },
    "resource_read": {
      "details": {
        "reason": "not_advertised"
      },
      "latency_ms": null,
      "status": "missing"
    },
    "resources_list": {
      "details": {
        "headers": {
          "content-type": "text/event-stream",
          "strict-transport-security": "max-age=63072000"
        },
        "http_status": 200,
        "payload": {
          "error": {
            "code": -32601,
            "message": "Method not found"
          },
          "id": 5,
          "jsonrpc": "2.0"
        },
        "reason": "not_supported",
        "url": "https://mcp.nullary.ai/mcp"
      },
      "latency_ms": 34.69,
      "status": "missing"
    },
    "server_card": {
      "details": {
        "error": "Client error '404 Not Found' for url 'https://mcp.nullary.ai/.well-known/mcp/server-card.json'\nFor more information check: https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/404",
        "url": "https://mcp.nullary.ai/.well-known/mcp/server-card.json"
      },
      "latency_ms": 222.4,
      "status": "error"
    },
    "session_resume_probe": {
      "details": {
        "protocol_version": "2025-03-26",
        "reason": "no_session_id",
        "resume_expected": true,
        "transport": "streamable-http"
      },
      "latency_ms": null,
      "status": "warning"
    },
    "step_up_auth_probe": {
      "details": {
        "auth_required_checks": [],
        "broad_scopes": [],
        "challenge_headers": [],
        "minimal_scope_documented": false,
        "oauth_present": false,
        "scope_specificity_ratio": 0.0,
        "step_up_signals": [],
        "supported_scopes": []
      },
      "latency_ms": null,
      "status": "missing"
    },
    "tool_snapshot_probe": {
      "details": {
        "added": [],
        "changed_outputs": [],
        "current_tool_count": 35,
        "previous_tool_count": 35,
        "removed": [],
        "similarity": 1.0
      },
      "latency_ms": null,
      "status": "ok"
    },
    "tools_list": {
      "details": {
        "headers": {
          "content-type": "text/event-stream",
          "strict-transport-security": "max-age=63072000"
        },
        "http_status": 200,
        "payload": {
          "id": 2,
          "jsonrpc": "2.0",
          "result": {
            "tools": [
              {
                "annotations": {
                  "destructiveHint": false,
                  "idempotentHint": true,
                  "openWorldHint": true,
                  "readOnlyHint": true,
                  "title": "Search inactive compounds"
                },
                "description": "Inactive small-molecule compound-target pairs.",
                "inputSchema": {
                  "properties": {
                    "compound": {
                      "description": "compound name, ChEMBL ID, or InChIKey",
                      "type": "string"
                    },
                    "limit": {
                      "default": 25,
                      "description": "Maximum number of findings to return (1\u2013100, default 25).",
                      "maximum": 100,
                      "minimum": 1,
                      "type": "integer"
                    },
                    "offset": {
                      "default": 0,
                      "description": "Number of findings to skip before this page, for pagination (default 0).",
                      "minimum": 0,
                      "type": "integer"
                    },
                    "outcome": {
                      "description": "outcome filter (inactive, failed_safety, terminated, \u2026)",
                      "type": "string"
                    },
                    "target": {
                      "description": "UniProt accession or gene symbol",
                      "type": "string"
                    },
                    "tier": {
                      "default": "curated",
                      "description": "Confidence tier. 'curated' (default) returns the credible layer; 'all' also includes high-volume screening-grade rows (PubChem HTS inactives, CRISPR non-essential tails).",
                      "enum": [
                        "curated",
                        "all"
                      ],
                      "type": "string"
                    }
                  },
                  "required": [],
                  "type": "object"
                },
                "name": "search_inactive_compounds",
                "outputSchema": {
                  "properties": {
                    "coverage_note": {
                      "description": "Honest coverage caveat for thin Phase-1 modalities (present only when relevant).",
                      "type": "string"
                    },
                    "findings": {
                      "description": "Matching negative findings (same shape as the REST /findings endpoint).",
                      "items": {
                        "type": "object"
                      },
                      "type": "array"
                    },
                    "has_more": {
                      "description": "True when more results exist beyond this page.",
                      "type": "boolean"
                    },
                    "query_metadata": {
                      "description": "Echo of the resolved query \u2014 tool, limit, offset, and any applied presets.",
                      "type": "object"
                    },
                    "returned_count": {
                      "description": "Findings returned in this page.",
                      "type": "integer"
                    }
                  },
                  "required": [
                    "query_metadata"
                  ],
                  "type": "object"
                }
              },
              {
                "annotations": {
                  "destructiveHint": false,
                  "idempotentHint": true,
                  "openWorldHint": true,
                  "readOnlyHint": true,
                  "title": "Search failed selectivity"
                },
                "description": "Small molecules that failed selectivity.",
                "inputSchema": {
                  "properties": {
                    "compound": {
                      "description": "compound name, ChEMBL ID, or InChIKey",
                      "type": "string"
                    },
                    "limit": {
                      "default": 25,
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                      "minimum": 1,
                      "type": "integer"
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                      "description": "Number of findings to skip before this page, for pagination (default 0).",
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                      "type": "integer"
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                      "description": "outcome filter (inactive, failed_safety, terminated, \u2026)",
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                      "description": "UniProt accession or gene symbol",
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              },
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                  "openWorldHint": true,
                  "readOnlyHint": true,
                  "title": "Search admet failures"
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                "description": "Small-molecule ADMET failures.",
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                "description": "Antibody developability failures.",
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              },
              {
                "annotations": {
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                "description": "Discontinued/terminated clinical antibodies.",
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              {
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                "description": "Failed peptide therapeutics.",
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                "description": "PROTACs that failed degradation/ternary/permeability.",
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                  "readOnlyHint": true,
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                "description": "ADC failures attributed to linker chemistry.",
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                "description": "Bispecific format/engineering failures.",
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                "description": "Drug-drug interaction failures.",
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    "oauth_protected_resource": {
      "error": "Client error '404 Not Found' for url 'https://mcp.nullary.ai/.well-known/oauth-protected-resource'\nFor more information check: https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/404",
      "url": "https://mcp.nullary.ai/.well-known/oauth-protected-resource"
    },
    "openid_configuration": {
      "reason": "no_authorization_server"
    },
    "server_card": {
      "error": "Client error '404 Not Found' for url 'https://mcp.nullary.ai/.well-known/mcp/server-card.json'\nFor more information check: https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/404",
      "url": "https://mcp.nullary.ai/.well-known/mcp/server-card.json"
    }
  },
  "remote_url": "https://mcp.nullary.ai/mcp",
  "server_card_payload": null,
  "server_identifier": "ai.nullary/nullary"
}

Known versions

1.0.1

Validation history

7 day score delta

n/a

30 day score delta

n/a

Recent healthy ratio

100%

Freshness

2.9h

Timestamp	Status	Score	Latency	Tools
May 27, 2026 12:49:40 AM UTC	Healthy	76.0	617.2 ms	35
May 26, 2026 12:49:15 PM UTC	Healthy	76.4	1637.2 ms	35
May 26, 2026 12:39:02 AM UTC	Healthy	74.1	1964.2 ms	0
May 25, 2026 12:38:52 AM UTC	Healthy	70.0	1901.3 ms	0

Validation timeline

Validated	Summary	Score	Protocol	Auth mode	Tools	High-risk tools	Changes
May 27, 2026 12:49:40 AM UTC	Healthy	76.0	2025-03-26	public	35	25	none
May 26, 2026 12:49:15 PM UTC	Healthy	76.4	2025-03-26	public	35	25	auth_mode_changed write_surface_expanded tool_snapshot_changed
May 26, 2026 12:39:02 AM UTC	Healthy	74.1	unknown	unknown	0	0	none
May 25, 2026 12:38:52 AM UTC	Healthy	70.0	unknown	unknown	0	0	none

Recent validation runs

Started	Status	Summary	Latency	Checks
May 27, 2026 12:49:39 AM UTC	Completed	Healthy	617.2 ms	action_safety_probe, advanced_capabilities_probe, connector_publishability_probe, connector_replay_probe, determinism_probe, initialize, interactive_flow_probe, oauth_authorization_server, oauth_protected_resource, official_registry_probe, openid_configuration, probe_noise_resilience, prompt_get, prompts_list, protocol_version_probe, provenance_divergence_probe, request_association_probe, resource_read, resources_list, server_card, session_resume_probe, step_up_auth_probe, tool_snapshot_probe, tools_list, transport_compliance_probe, utility_coverage_probe
May 26, 2026 12:49:13 PM UTC	Completed	Healthy	1637.2 ms
May 26, 2026 12:39:01 AM UTC	Completed	Healthy	1964.2 ms
May 25, 2026 12:38:51 AM UTC	Completed	Healthy	1901.3 ms