{"uid":"cap_Q5tVs1FJPxsFmGPMiiP5D","slug":"agoranome-seller-attest-1f3389d4","name":"Agoranome Seller Attest","description":"Trust proof for an x402 seller: a signed attestation of your API's sample output, so buyer agents can check it before paying. Agoranome fetches a free sample from your endpoint's host, checks that your paid route on the same host answers with an x402 offer, and signs an attestation of what it saw and when: the sample's SHA-256 and body, and the offer's price, network and pay-to. Buyers check it at a public URL.","url":"https://api.agoranome.com/v1/seller/attest?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","required":["sample","resource"],"properties":{"sample":{"type":"string","description":"Public https URL that returns a sample output without payment"},"resource":{"type":"string","description":"Your paid x402 endpoint, on the same host as the sample"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"result":{"url":"https://api.agoranome.com/v1/attestations/att_...","attestation":{"offer":{"accepts":[{"pay_to":"0x...","price_usd":0.02}]},"sample":{"bytes":1832,"sha256":"...","status":200},"provenance":{"signature":"...","agent_address":"0x..."}},"attestation_id":"att_..."}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","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":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_i3dWSZLoBkASda2iggCIq","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Generates a cryptographically signed attestation for a paid x402 API endpoint by fetching a sample output and signing its hash, so buyer agents can verify what they're purchasing before paying.","exampleAgentPrompt":"Attest my x402 API endpoint at https://api.myservice.com/v1/data — use https://api.myservice.com/v1/data/sample as the public sample URL — so buyers can trust what they're getting before paying.","exampleUseCases":[{"title":"Verifying a new paid data API","prompt":"I just launched a paid x402 endpoint at https://api.myweather.com/v1/forecast and I want buyer agents to trust it before they pay — can you generate a signed attestation using https://api.myweather.com/v1/forecast/sample as the sample URL?"},{"title":"Boosting Bazaar listing credibility","prompt":"My API listing on the x402 Bazaar isn't converting well — can you create an Agoranome attestation for https://api.myfinance.com/v1/prices using https://api.myfinance.com/v1/prices/sample so it has a verifiable trust signal?"},{"title":"Certifying API output before onboarding clients","prompt":"Before I pitch my paid API at https://api.myreports.com/v1/summary to enterprise agent buyers, I want to show them a signed proof of what it returns — can you attest it using https://api.myreports.com/v1/summary/sample?"}],"resultDescription":"Returns a JSON object containing an attestation ID, a URL to the full attestation record, and a nested attestation object that includes the offer's payment details (wallet address and price in USD), the sample's byte size and SHA256 hash and HTTP status, and a provenance object with a cryptographic signature and the attesting agent's wallet address.","failureModes":["Sample URL is not publicly reachable or returns a non-200 status — attestation cannot be generated","Sample URL and resource URL are on different hosts — schema requires same-host pairing","Resource URL is not a valid x402 paid endpoint — attestation may be rejected","Network timeout fetching the sample — request fails with an error","Invalid HTTP method supplied — schema only accepts GET, HEAD, or DELETE"],"whenToPreferThis":"Use this endpoint when you are an API seller who wants to add cryptographic trust signals to a paid x402 endpoint so that buyer agents can verify the offer's sample output before committing payment. It is specifically designed for x402 marketplace credibility — prefer it over generic signing tools when your goal is to produce an Agoranome-recognized attestation that integrates with Bazaar rankings and buyer agent evaluation flows.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-28T06:39:37.053Z","isFirstParty":false,"canonicalSlug":"agoranome-seller-attest-1f3389d4"}