{"schema_version":"verify.report.v1","generated_at":"2026-07-04T14:12:25.195407+00:00","snapshot_id":"trustsnap_2124f9f86692653b","server":{"namespace":"coal","name":"coal-payments","title":"Coal - Payments for AI agents","description":"# Coal\n\nCoal gives AI agents a real checkout.\n\nDiscover merchants through the decentralized 0G Storage catalog, pay autonomously in USDC on Base via x402 (Coinbase) or OKX APP (v2 envelope), and download purchased products — all without a human in the loop.\n\nReceipts are anchored on 0G Chain, allowing any third party to independently verify payments without trusting Coal itself.\n\nThe MCP server is fully multi-tenant: every user supplies their own wallet key through the `X-Coal-Agent-Key` header, meaning the server never stores long-lived private keys or custody secrets.\n\nAgents are gasless by default — Coal covers operator gas costs.\n\n---\n\n## MCP Tools (13)\n\n### Discovery & Marketplace\n\n* `discover_merchants`\n  Browse the marketplace as a Markdown product grid\n\n* `search_products`\n  Search and filter by product name, price, or tags\n\n* `get_merchant_profile`\n  Retrieve merchant metadata and payout addresses\n\n* `query_merchant_memory`\n  Natural-language merchant Q&A powered by TEE-backed 0G Compute\n\n---\n\n### Payments & Checkout\n\n* `check_paywall`\n  Check whether an address has already paid\n\n* `create_checkout`\n  Create a Coal checkout session *(requires API key)*\n\n* `get_checkout_status`\n  Retrieve checkout session state and payment status\n\n* `pay_merchant`\n  Send USDC on Base using ERC-3009 gasless transfers\n\n---\n\n### Verification & Delivery\n\n* `verify_receipt`\n  Verify the complete proof trail:\n\n  1. Base transaction\n  2. 0G Storage receipt\n  3. 0G Chain anchor\n\n* `download_product`\n  Verify on-chain payment and return a signed download URL\n\n---\n\n### Infrastructure & Agent Utilities\n\n* `get_0g_health`\n  Check live 0G mainnet status\n\n* `agent_wallet_status`\n  View derived wallet address and USDC balance\n\n* `setup_instructions`\n  Print the full integration and setup guide\n\n---\n\n## Live Demos\n\n* Claude paying $0.10 for an ebook end-to-end\n  `https://agent.usecoal.xyz`\n\n* x402 paywall demo\n  `https://oracle.usecoal.xyz/api/price/ETH`\n\n---\n\n## Stack\n\n* Dual-protocol support:\n\n  * Coinbase x402\n  * OKX APP\n\n* Base USDC settlement\n\n* 0G Storage receipts\n\n* 0G Chain receipt anchoring\n\n* 0G Compute Sealed Inference for policy execution\n\n* ERC-3009 gasless payment 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