{"serverId":"mcp-registry/com.gradientdecisions/merchant-check","tools":[{"name":"check_merchant","fixed":{"name":"check_merchant","description":"Before paying an unfamiliar merchant via x402, including one just discovered through a marketplace like Coinbase's x402 Bazaar, call this for a machine-readable assessment of their observable on-chain payment behavior, on Base or Solana. Returns a `recommendation` (PROCEED / CAUTION / INSUFFICIENT_SIGNAL) a payment policy can branch on directly, plus supporting evidence: trust tier, confidence, payer diversity, transaction history, category (data_api/compute/content_generation/financial_data/sto","inputSchema":{"type":"object","$schema":"http://json-schema.org/draft-07/schema#","required":["merchant_wallet_address"],"properties":{"asset":{"type":"string","description":"Optional. Payment asset/token from the 402 response's accepts[].asset. Not required to score."},"price":{"type":"number","description":"Quoted price in USD-equivalent, if checking fairness"},"amount":{"type":"string","description":"Optional. Atomic payment amount from the 402 response's accepts[].amount, if preferred over `price`. Not required to score."},"network":{"type":"string","description":"Optional. CAIP-2 network id from the 402 response's accepts[].network (e.g. \"eip155:8453\"), if already on hand. Not required to score."},"service_url":{"type":"string","description":"Optional. The resource/service URL the agent was trying to reach. Not required to score."},"resource_type":{"type":"string","description":"Deprecated, accepted but unused. Price-fairness now compares against the merchant's own on-chain-derived category automatically, no need to supply this."},"merchant_wallet_address":{"type":"string","description":"Merchant's receiving wallet address: a Base (0x...) or Solana (base58) address. Usually extractable directly from a 402 Payment Required response's accepts[].payTo."}},"additionalProperties":false},"annotations":{"readOnlyHint":true}},"changes":[{"kind":"annotations","detail":"Added readOnlyHint: true (inferred from the name).","verify":true}],"tokensBefore":515,"tokensAfter":515}],"toolsChanged":1,"tokensSaved":0,"todo":[],"note":"Deterministic fixes. Changes marked verify need a human look before shipping (renames, inferred annotations, inferred types, removed text). Parameter descriptions in `todo` need to be written by someone who knows the API."}