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Agoranome Seller Attest
x402
Agoranome Seller Attest is a paid API for AI agents from api.agoranome.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-28).
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.
Price / call$0.05
Success—
StatusUnknown
How this service works
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.
Output
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.
Example use cases
Verifying a new paid data API
“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?”
Boosting Bazaar listing credibility
“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?”
Certifying API output before onboarding clients
“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?”
Technical details
Endpoint
GEThttps://api.agoranome.com/v1/seller/attest?utm_source=zero.xyzWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"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_..."
}
}
}Tags
x402
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