{"uid":"cap_KlrXs6WtLcWMvI6SlFpLJ","slug":"the-sealer-protocol-onchain-attestation-b5d860a4","name":"The Sealer Protocol – Onchain Attestation","description":"Onchain accountability for AI agents. Commit, prove, get certified.","url":"https://thesealer.xyz/api/attest","method":"POST","headers":{},"bodySchema":null,"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_vjb41SaMixIpKruwyiv1o","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":"Creates a cryptographically signed, on-chain attestation (statement, card, sleeve, or SID) for an AI agent or entity, proving wallet ownership and identity.","exampleAgentPrompt":"Seal and certify my AI agent — wallet address 0xAbC123..., entity type AI_AGENT, using the 'card' format on Base, with the statement 'This agent is operated by Aria Labs and follows safe usage guidelines'; my agent name is 'Aria' and handle is 'aria.agent'.","exampleUseCases":null,"resultDescription":"Returns a certified attestation artifact (statement, card, sleeve, or SID) anchored on-chain (Base or Solana), proving that the agent at the specified wallet address committed to the given content at a specific timestamp, signed with an EIP-712 proof of wallet ownership.","failureModes":["Expired nonce (agentNonce must be within 5 minutes of current Unix time) — request rejected","Invalid EIP-712 signature — authentication fails and attestation is not created","Unsupported chain value — must be 'Base' or 'Solana'","Invalid format enum — must be one of 'statement', 'card', 'sleeve', 'sid'","Missing required fields (agentId, agentSig, agentNonce, format) — 400 Bad Request","Image URL uses HTTP instead of HTTPS — rejected","Payment failure — 0.1 USDC not received via x402 protocol"],"whenToPreferThis":"Use this endpoint when an AI agent needs to create a verifiable, on-chain identity credential or accountability record — especially when the output must be cryptographically tied to a specific wallet address via EIP-712 signature. Prefer this over off-chain identity solutions when blockchain-native proof of agent identity, statement commitment, or certified SID is required on Base or Solana.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T06:32:17.294Z","isFirstParty":false}