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BYTE Library x402 Gateway – Evidence Pack Feed
x402
BYTE Library x402 Gateway – Evidence Pack Feed is a paid API for AI agents from x402.payperbyte.io, paid per call via x402, $0.02/call, status down (last checked 2026-09-15).
Returns a cryptographically signed, EIP-712 provenance-stamped evidence pack data feed payload, paid per call in USDC via x402 on Base with no API key required
Price / call$0.02
Success—
StatusDown
How this service works
Cryptographically attested, first-party data feeds for AI agents — covering crypto markets, DeFi yields, weather, earthquakes, news, code-pulse, threat-intel, address reputation, sanctions screening, and supply-chain verdicts. Every paid response carries EIP-712 receipts you verify before acting: (1) a GATEWAY delivery-integrity receipt (X-BYTE-Attestation header, signed by the PayPerByte gateway key) proving these are exactly the bytes we served; and (2) on the 14 attested feeds (provenance:eip712-attested in GET /feeds), a LIVE per-feed PayloadAttestation by that feed's OWN distinct publisher key, anchored ON-CHAIN — recover it from the broadcast the response references via txHash. (Separately, the POST verdict oracles embed their own per-feed `attestation` directly in the response body — recover attestation.signer.) Both attest authenticity + tamper-evidence under the BYTE Library domain. NEITHER asserts the correctness of the underlying data or any verdict, and NEITHER claims an independent third-party data source signed it — all keys are first-party PayPerByte. Pay per call in USDC over x402 with no API keys — a wallet, not a secret on the box. Settlement is on Base (eip155:8453). Price is per-feed, derived from expected payload size at $0.005000/KB (floor $0.001000).
Output
A JSON payload containing the 'evidence-pack' feed data, cryptographically signed and stamped with an EIP-712 PayloadAttestation proving data provenance, settled on Base (eip155:8453). Payment of $0.05 USDC is deducted via x402 before the payload is released.
Example use cases
Sanctions screening with on-chain proof
“Check this wallet address against the sanctions list and give me back the signed EIP-712 evidence pack — pay the fee from my Base wallet in USDC so I have a tamper-evident audit trail I can show compliance.”
DeFi yield data for trustless pipeline
“Pull the latest DeFi yield feed from PayPerByte, pay the per-call USDC fee from my Base wallet, and hand me the cryptographically attested payload with the EIP-712 receipt so my downstream smart contract can verify it before acting.”
Earthquake alert with verifiable provenance
“Grab the earthquake feed right now — settle the cost in USDC from my Base wallet, no API key, and return the full provenance-stamped evidence pack with the on-chain attestation so I can prove the data integrity to anyone auditing my pipeline.”
Technical details
Endpoint
POSThttps://x402.payperbyte.io/feeds/evidence-packWhen to prefer
Choose this endpoint when an AI agent needs cryptographically verifiable, provenance-stamped data and must prove data integrity to downstream consumers — especially when no API key management is desired and payment via USDC wallet on Base is acceptable. Ideal for trustless, audit-trail-required pipelines where signed attestations matter more than raw throughput.
Side effects
- Insufficient USDC balance — payment fails, feed not returned
- Invalid or missing x402 payment header — 402 Payment Required response
- Wallet not on Base (eip155:8453) — settlement chain mismatch error
- Feed name not recognized — 404 or empty response
- Network congestion on Base causing settlement delay — timeout or retry needed
- Malformed POST body — 400 Bad Request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"feed": "evidence-pack"
}
}Tags
x402
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