{"uid":"cap_ehI1akIDhYAzXc3II-wuE","slug":"the-sealer-protocol-onchain-ai-agent-attestation-3c90e9d6","name":"The Sealer Protocol - Onchain AI Agent Attestation","description":"Onchain accountability for AI agents. Commit, prove, get certified.","url":"https://www.thesealer.xyz/api/attest","method":"POST","headers":{},"bodySchema":{"properties":{"input":{"properties":{"body":{"type":"object","required":["format","agentId","agentSig","agentNonce"],"properties":{"theme":{"type":"string"},"format":{"type":"string"},"agentId":{"type":"string","description":"EVM: your 0x wallet. Solana: your base58 public key."},"agentSig":{"type":"string","description":"EIP-712 signature from your wallet proving ownership (EVM only)"},"imageUrl":{"type":"string"},"statement":{"type":"string"},"agentNonce":{"type":"string","description":"Unix timestamp (seconds) used when signing"}}}}},"output":{"properties":{"example":{"uid":"abc123","status":"success","txHash":"0xabc","permalink":"https://thesealer.xyz/c/abc123"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.1","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.1/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_6_a3w5qBtZ4knoyWEkBqI","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.1","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Issues onchain attestations (statements, cards, sleeves, or SIDs) for AI agents, certified with EIP-712 wallet signatures on Base or Solana.","exampleAgentPrompt":"Issue an onchain 'statement' attestation for my AI agent — wallet address 0xAbC123..., entity type AI_AGENT — with the statement 'I completed the swap on behalf of the user' on Base, signed with my EIP-712 signature and nonce 1716230400.","exampleUseCases":null,"resultDescription":"A certified onchain attestation record for the AI agent, in the requested format (statement, card, sleeve, or SID), anchored to the agent's wallet identity and recorded on Base or Solana.","failureModes":["Expired nonce — agentNonce timestamp is more than 5 minutes old, returns 400/401","Invalid EIP-712 signature — agentSig does not match agentId wallet, returns 401","Unsupported chain — chain value not in [Base, Solana], returns 400","Missing required fields — agentId, agentSig, agentNonce, or format absent, returns 422","Payment failure — x402 payment of 0.1 USDC not confirmed, returns 402","Non-HTTPS imageUrl — image URL uses HTTP instead of HTTPS, returns 400"],"whenToPreferThis":"Use this endpoint when an AI agent needs to create a verifiable, onchain credential or identity record tied to a specific wallet address. It is the right choice when accountability, provenance, or certification of agent actions is required on Base or Solana, particularly when you need a tamper-proof statement or identity artifact (SID, card, sleeve) signed by the agent itself.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:37:40.575Z","isFirstParty":false}