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PayPerByte Reasoning Verdict Oracle
x402
PayPerByte Reasoning Verdict Oracle is a paid API for AI agents from x402.payperbyte.io, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-14).
Submits a transaction, action, or decision subject to an AI reasoning model that returns a scored risk verdict (PASS/WARN/FAIL) with an EIP-712 cryptographic attestation proving the exact bytes served
Price / call$0.1
Success—
StatusUnknown
How this service works
Verify-before-act risk oracle: POST an action context and get a signed ALLOW/WARN/BLOCK/ABSTAIN verdict + 0-100 score + reasons from a LOCAL model (no data egress). Advisory: the receipt proves provenance/integrity, not correctness. Full method: https://x402.payperbyte.io/feeds
Output
A JSON response containing: a versioned answer object with the verdict string (PASS/WARN/FAIL), a numeric risk score (0-100), a confidence rating (low/medium/high), a list of risk reasons, a one-sentence summary rationale, the ruleset applied, and the original subject; plus an EIP-712 attestation object containing the signer address, signature, payload hash, and BYTE Library domain info (chainId 421614, Arbitrum Sepolia signing namespace). The attestation proves tamper-evidence of the exact bytes returned but does not guarantee verdict correctness.
Example use cases
Agentic payment approval gate
“Before my agent sends 10,000 USDC to 0x9Fa3...beef for vendor invoice #99, run a reasoning verdict on that transaction and block the payment if the verdict is WARN or FAIL — I need the risk score and the signed attestation as proof.”
DeFi action risk check
“I'm about to deposit 50 ETH into a new liquidity pool via 0xPool...1234 — can you get a scored risk verdict on whether that's advisable, with a confidence level and a cryptographic receipt I can keep for audit purposes?”
Compliance review of wallet release
“Our compliance agent needs to review releasing $25,000 to counterparty wallet 0xCafe...dead for a cross-border payment — get a PASS/WARN/FAIL verdict with reasons and the EIP-712 attestation so we can log it.”
Technical details
Endpoint
POSThttps://x402.payperbyte.io/feeds/reasoning-verdictWhen to prefer
Choose this endpoint when you need an AI-generated risk verdict on a specific transaction or decision AND require a cryptographic attestation (EIP-712) proving the exact response bytes were served by the publisher — ideal for agentic payment workflows, compliance logging, or any context where tamper-evidence of the advisory output is required. Prefer it over generic LLM reasoning calls when auditability and on-chain provenance matter.
Side effects
- Invalid or missing subject field returns a 400 error
- Payment failure via x402 protocol results in 402 response before any verdict is issued
- Unknown or unsupported ruleset returns an error
- Model uncertainty may produce low-confidence verdicts with ambiguous reasoning
- Attestation signer recovery failure if chainId or domain parameters mismatch
- Rate limiting or upstream model unavailability returns 5xx
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| kind | string | Optional. The action type, to focus the judgment (default "general"). Echoed back in answer.kind. |
| context | string | Optional. Extra context for the judgment — a string, or a JSON object/array (it is stringified). Length-capped server-side. |
| subject | string | The action/text to judge — the message, payload, proposal, payee, or tool-call the agent is about to act on. Returns a signed ALLOW/WARN/BLOCK/ABSTAIN verdict + a 0-100 safe-to-proceed score + reasons from a LOCAL model (no data egress). |
Output
Schema · Response
{
"type": "json",
"example": {
"_note": "Illustrative response shape — not a live answer. The verdict is advisory. The embedded EIP-712 receipt (domain chainId 421614 = Arbitrum Sepolia, a frozen signing namespace, not a settlement rail) proves who signed the exact answer bytes — not that the verdict is correct.",
"answer": {
"v": "reasoning-verdict/v1",
"kind": "transaction",
"score": 40,
"reasons": [
"illustrative — real answers list the model's risk reasons"
],
"ruleset": "rv-v1",
"subject": "Release 5,000 USDC to 0x1111111111111111111111111111111111111111 for invoice #42?",
"summary": "illustrative — a one-sentence rationale from the LOCAL model",
"verdict": "WARN",
"confidence": "medium",
"disclaimer": "The receipt proves these exact bytes came from this publisher; it does NOT guarantee the verdict is correct. AI-generated advisory analysis — verify independently before acting."
},
"attestation": {
"domain": {
"name": "BYTE Library",
"chainId": 421614,
"version": "1"
},
"signer": "0x…",
"signature": "0x…",
"payloadHash": "0x…"
}
}
}Tags
x402
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