MemeStack

{
  "annotations": {
    "destructiveHint": false,
    "idempotentHint": true,
    "openWorldHint": true,
    "readOnlyHint": true,
    "tier": "free",
    "title": "Search Images"
  },
  "capabilities": [
    "read",
    "network"
  ],
  "input_schema": {
    "properties": {
      "limit": {
        "description": "Results per page (1-50, default 10)",
        "type": "number"
      },
      "offset": {
        "description": "Pagination offset (default 0)",
        "type": "number"
      },
      "q": {
        "description": "Alias for `query`. Provided so REST-API muscle memory (?q=...) works on the MCP tool too. If both are set, `query` wins.",
        "type": "string"
      },
      "query": {
        "description": "Search query \u2014 combines semantic AI and keyword matching automatically. Alias: `q` (matches the REST API param name).",
        "type": "string"
      },
      "sort": {
        "description": "Sort order (default: relevance)",
        "enum": [
          "newest",
          "popular",
          "oldest"
        ],
        "type": "string"
      },
      "tag": {
        "description": "Filter results by a single tag slug (backward compat)",
        "type": "string"
      },
      "tags": {
        "description": "Filter results by multiple tag slugs (comma-separated, AND logic \u2014 e.g. \"bitcoin,meme\")",
        "type": "string"
      }
    },
    "required": [
      "query"
    ],
    "type": "object"
  },
  "risk_flags": [
    "arbitrary_network_egress",
    "freeform_input_surface"
  ]
}

{
  "annotations": {
    "destructiveHint": false,
    "idempotentHint": true,
    "openWorldHint": true,
    "readOnlyHint": true,
    "tier": "free",
    "title": "Get Image Details"
  },
  "capabilities": [
    "read",
    "network"
  ],
  "input_schema": {
    "properties": {
      "id": {
        "description": "Image UUID",
        "type": "string"
      }
    },
    "required": [
      "id"
    ],
    "type": "object"
  },
  "risk_flags": [
    "arbitrary_network_egress"
  ]
}

{
  "annotations": {
    "destructiveHint": false,
    "idempotentHint": true,
    "openWorldHint": true,
    "readOnlyHint": true,
    "tier": "free",
    "title": "Find Similar Images"
  },
  "capabilities": [
    "read",
    "network"
  ],
  "input_schema": {
    "properties": {
      "id": {
        "description": "Source image UUID",
        "type": "string"
      },
      "limit": {
        "description": "Max results (1-20, default 10)",
        "type": "number"
      }
    },
    "required": [
      "id"
    ],
    "type": "object"
  },
  "risk_flags": [
    "arbitrary_network_egress"
  ]
}

{
  "annotations": {
    "destructiveHint": false,
    "idempotentHint": true,
    "openWorldHint": true,
    "readOnlyHint": true,
    "tier": "free",
    "title": "Find Related Images"
  },
  "capabilities": [
    "read",
    "network"
  ],
  "input_schema": {
    "properties": {
      "id": {
        "description": "Source image UUID",
        "type": "string"
      },
      "limit": {
        "description": "Max results (1-20, default 10)",
        "type": "number"
      }
    },
    "required": [
      "id"
    ],
    "type": "object"
  },
  "risk_flags": [
    "arbitrary_network_egress"
  ]
}

{
  "annotations": {
    "destructiveHint": false,
    "idempotentHint": true,
    "openWorldHint": true,
    "readOnlyHint": true,
    "tier": "free",
    "title": "Browse Images"
  },
  "capabilities": [
    "read",
    "network"
  ],
  "input_schema": {
    "properties": {
      "limit": {
        "description": "Results per page (1-50, default 10)",
        "type": "number"
      },
      "offset": {
        "description": "Pagination offset (default 0)",
        "type": "number"
      },
      "sort": {
        "description": "Sort order (default: newest)",
        "enum": [
          "newest",
          "popular",
          "oldest",
          "trending"
        ],
        "type": "string"
      },
      "tag": {
        "description": "Filter by tag slug (e.g. \"bitcoin\", \"meme\")",
        "type": "string"
      }
    },
    "type": "object"
  },
  "risk_flags": [
    "arbitrary_network_egress"
  ]
}

{
  "annotations": {
    "destructiveHint": false,
    "idempotentHint": true,
    "openWorldHint": true,
    "readOnlyHint": true,
    "tier": "free",
    "title": "Get User Profile"
  },
  "capabilities": [
    "read",
    "network"
  ],
  "input_schema": {
    "properties": {
      "identifier": {
        "description": "User public key (hex) or UUID",
        "type": "string"
      }
    },
    "required": [
      "identifier"
    ],
    "type": "object"
  },
  "risk_flags": [
    "arbitrary_network_egress"
  ]
}

{
  "annotations": {
    "destructiveHint": false,
    "idempotentHint": true,
    "openWorldHint": true,
    "readOnlyHint": true,
    "tier": "free",
    "title": "Get Leaderboard"
  },
  "capabilities": [
    "read",
    "network"
  ],
  "input_schema": {
    "properties": {
      "period": {
        "description": "Time period (default: week)",
        "enum": [
          "day",
          "week",
          "month",
          "all"
        ],
        "type": "string"
      },
      "type": {
        "description": "Leaderboard type",
        "enum": [
          "images",
          "zappers"
        ],
        "type": "string"
      }
    },
    "required": [
      "type"
    ],
    "type": "object"
  },
  "risk_flags": [
    "arbitrary_network_egress"
  ]
}

{
  "annotations": {
    "destructiveHint": false,
    "idempotentHint": true,
    "openWorldHint": true,
    "readOnlyHint": true,
    "tier": "free",
    "title": "Browse by Tag"
  },
  "capabilities": [
    "read",
    "network"
  ],
  "input_schema": {
    "properties": {
      "limit": {
        "description": "Images per page (1-50, default 10). When provided, images are included in the response.",
        "type": "number"
      },
      "offset": {
        "description": "Pagination offset (default 0)",
        "type": "number"
      },
      "tag": {
        "description": "Tag slug (e.g. \"bitcoin\", \"meme\", \"lightning\")",
        "type": "string"
      }
    },
    "required": [
      "tag"
    ],
    "type": "object"
  },
  "risk_flags": [
    "arbitrary_network_egress"
  ]
}

{
  "annotations": {
    "destructiveHint": false,
    "idempotentHint": true,
    "openWorldHint": true,
    "readOnlyHint": true,
    "tier": "free",
    "title": "Browse by Category"
  },
  "capabilities": [
    "read",
    "network"
  ],
  "input_schema": {
    "properties": {
      "category": {
        "description": "Category slug (e.g. \"charts\", \"memes\")",
        "type": "string"
      }
    },
    "required": [
      "category"
    ],
    "type": "object"
  },
  "risk_flags": [
    "arbitrary_network_egress"
  ]
}

{
  "annotations": {
    "destructiveHint": false,
    "idempotentHint": true,
    "openWorldHint": true,
    "readOnlyHint": true,
    "tier": "free",
    "title": "List Categories"
  },
  "capabilities": [
    "read",
    "network"
  ],
  "input_schema": {
    "properties": {},
    "type": "object"
  },
  "risk_flags": [
    "arbitrary_network_egress"
  ]
}

{
  "annotations": {
    "destructiveHint": false,
    "idempotentHint": true,
    "openWorldHint": true,
    "readOnlyHint": true,
    "tier": "free",
    "title": "Get Tag Profile"
  },
  "capabilities": [
    "read",
    "network"
  ],
  "input_schema": {
    "properties": {
      "tag": {
        "description": "Tag slug (e.g. \"bitcoin\", \"meme\")",
        "type": "string"
      }
    },
    "required": [
      "tag"
    ],
    "type": "object"
  },
  "risk_flags": [
    "arbitrary_network_egress"
  ]
}

{
  "annotations": {
    "destructiveHint": false,
    "idempotentHint": true,
    "openWorldHint": true,
    "readOnlyHint": true,
    "tier": "free",
    "title": "Get Mutation Group"
  },
  "capabilities": [
    "read",
    "network"
  ],
  "input_schema": {
    "properties": {
      "image_id": {
        "description": "Image UUID",
        "type": "string"
      }
    },
    "required": [
      "image_id"
    ],
    "type": "object"
  },
  "risk_flags": [
    "arbitrary_network_egress"
  ]
}

{
  "annotations": {
    "destructiveHint": false,
    "idempotentHint": true,
    "openWorldHint": true,
    "readOnlyHint": true,
    "tier": "free",
    "title": "Search OCR Text"
  },
  "capabilities": [
    "read",
    "network"
  ],
  "input_schema": {
    "properties": {
      "limit": {
        "description": "Results per page (1-50, default 10)",
        "type": "number"
      },
      "offset": {
        "description": "Pagination offset",
        "type": "number"
      },
      "query": {
        "description": "Text to search for in image OCR",
        "type": "string"
      }
    },
    "required": [
      "query"
    ],
    "type": "object"
  },
  "risk_flags": [
    "arbitrary_network_egress",
    "freeform_input_surface"
  ]
}

{
  "annotations": {
    "destructiveHint": false,
    "idempotentHint": true,
    "openWorldHint": true,
    "readOnlyHint": true,
    "tier": "free",
    "title": "Find Meme For Text"
  },
  "capabilities": [
    "read",
    "network"
  ],
  "input_schema": {
    "properties": {
      "limit": {
        "description": "How many memes to return (1-20, default 5)",
        "type": "number"
      },
      "vibe": {
        "description": "The vibe, topic, or idea you want a meme for",
        "type": "string"
      }
    },
    "required": [
      "vibe"
    ],
    "type": "object"
  },
  "risk_flags": [
    "arbitrary_network_egress"
  ]
}

{
  "annotations": {
    "destructiveHint": false,
    "idempotentHint": true,
    "openWorldHint": true,
    "readOnlyHint": true,
    "tier": "free",
    "title": "Popular Tags"
  },
  "capabilities": [
    "read",
    "network"
  ],
  "input_schema": {
    "properties": {
      "limit": {
        "description": "How many tags to return (1-100, default 20)",
        "type": "number"
      }
    },
    "type": "object"
  },
  "risk_flags": [
    "arbitrary_network_egress"
  ]
}

{
  "annotations": {
    "destructiveHint": false,
    "idempotentHint": true,
    "openWorldHint": true,
    "readOnlyHint": true,
    "tier": "free",
    "title": "Tag Autocomplete"
  },
  "capabilities": [
    "read",
    "network"
  ],
  "input_schema": {
    "properties": {
      "limit": {
        "description": "Max suggestions (1-50, default 10)",
        "type": "number"
      },
      "prefix": {
        "description": "Tag prefix to autocomplete (\u2265 2 characters), e.g. \"bit\" \u2192 \"bitcoin\".",
        "minLength": 2,
        "type": "string"
      }
    },
    "required": [
      "prefix"
    ],
    "type": "object"
  },
  "risk_flags": [
    "arbitrary_network_egress"
  ]
}

{
  "annotations": {
    "destructiveHint": false,
    "idempotentHint": true,
    "openWorldHint": true,
    "readOnlyHint": true,
    "tier": "free",
    "title": "Cite Image"
  },
  "capabilities": [
    "read",
    "network"
  ],
  "input_schema": {
    "properties": {
      "image_ids": {
        "description": "Up to 50 image UUIDs",
        "items": {
          "type": "string"
        },
        "maxItems": 50,
        "minItems": 1,
        "type": "array"
      }
    },
    "required": [
      "image_ids"
    ],
    "type": "object"
  },
  "risk_flags": [
    "arbitrary_network_egress"
  ]
}

{
  "annotations": {
    "destructiveHint": false,
    "idempotentHint": true,
    "openWorldHint": true,
    "readOnlyHint": true,
    "tier": "free",
    "title": "Reverse Image Search"
  },
  "capabilities": [
    "read",
    "network"
  ],
  "input_schema": {
    "properties": {
      "limit": {
        "description": "Max results (1-20, default 10)",
        "type": "number"
      },
      "url": {
        "description": "HTTPS image URL, or data:image/(jpeg|png|webp);base64,... URL",
        "type": "string"
      }
    },
    "required": [
      "url"
    ],
    "type": "object"
  },
  "risk_flags": [
    "arbitrary_network_egress",
    "freeform_input_surface"
  ]
}

{
  "annotations": {
    "destructiveHint": false,
    "idempotentHint": false,
    "openWorldHint": true,
    "readOnlyHint": false,
    "tier": "free",
    "title": "Submit Image"
  },
  "capabilities": [
    "write",
    "network"
  ],
  "input_schema": {
    "properties": {
      "attribution": {
        "description": "Optional credit line for the original creator/source (shown to moderators, not published).",
        "maxLength": 200,
        "type": "string"
      },
      "caption": {
        "description": "Optional caption hint for the AI tagger (admin-visible, never published verbatim).",
        "maxLength": 200,
        "type": "string"
      },
      "image_url": {
        "description": "HTTPS image URL, or data:image/(jpeg|png|webp);base64,... URL. Max 8MB.",
        "type": "string"
      },
      "tags": {
        "description": "Optional tag hints (max 10).",
        "items": {
          "maxLength": 40,
          "type": "string"
        },
        "maxItems": 10,
        "type": "array"
      }
    },
    "required": [
      "image_url"
    ],
    "type": "object"
  },
  "risk_flags": [
    "arbitrary_network_egress",
    "freeform_input_surface"
  ]
}

{
  "annotations": {
    "destructiveHint": false,
    "idempotentHint": false,
    "openWorldHint": true,
    "readOnlyHint": false,
    "tier": "free",
    "title": "Generate Meme"
  },
  "capabilities": [
    "network"
  ],
  "input_schema": {
    "properties": {
      "aspect_ratio": {
        "description": "Output image aspect ratio (default \"1:1\").",
        "enum": [
          "1:1",
          "3:4",
          "16:9"
        ],
        "type": "string"
      },
      "mode": {
        "description": "Generation quality tier \u2014 \"standard\" (default, cheaper) or \"quality\" (higher fidelity, costs more).",
        "enum": [
          "standard",
          "quality"
        ],
        "type": "string"
      },
      "prompt": {
        "description": "Text description of the image to generate (max 2000 characters).",
        "maxLength": 2000,
        "type": "string"
      }
    },
    "required": [
      "prompt"
    ],
    "type": "object"
  },
  "risk_flags": [
    "arbitrary_network_egress"
  ]
}

• 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`.

• 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.

• 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.

• Publish `/.well-known/mcp/server-card.json`.
• Include homepage, repository, support, tools, prompts/resources, and auth metadata.
• Revalidate the server after publishing the card.

• Update the server's advertised protocol version to a current MCP revision (2025-06-18 or later).
• Return the negotiated version consistently in both the `initialize` response and the `MCP-Protocol-Version` header.
• Revalidate and confirm `protocol_version_probe` reports `ok`.

• Review the blockers and failed criteria recorded by connector_publishability_probe.
• Correct the identified transport, authentication, server-card, or tool-stability gaps.
• Revalidate and require the probe to report no blockers before publishing the connector.

• 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.

• Serve `/.well-known/openid-configuration` with `issuer`, `jwks_uri`, `authorization_endpoint`, and `token_endpoint`.
• List supported grant types in `grant_types_supported` and scopes in `scopes_supported`.
• Revalidate and confirm the `openid_configuration` check returns `ok`.

• Persist session state keyed by `Mcp-Session-Id` so a client can reconnect after a dropped connection.
• Honor `Last-Event-ID` on GET reconnects to replay missed SSE events instead of erroring.
• Revalidate and confirm `session_resume_probe` no longer returns `warning`.

• 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.

• Compare the initialize result's instructions field with the current tools/list names.
• Rename the explicit reference or restore the missing tool.
• Revalidate and confirm instruction_tool_reference_probe reports ok.