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Saylor Innovations x402 Endpoint Audit
x402
Saylor Innovations x402 Endpoint Audit is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-26).
Audits an x402-gated URL before payment, returning compliance status, pricing details, supported networks, metadata, schema, and a risk score
Price / call$0.01
Success—
StatusUnknown
How this service works
x402 endpoint buyer audit - compliance, pricing, networks, metadata, schema and risk score before payment
Output
Returns a JSON object with the canonical URL, a numeric risk/quality score from 0–100, a text verdict summarizing the assessment, an array of reasons/evidence behind the verdict, pricing details, supported payment options, contract address, verification data, and strengths identified for the endpoint.
Example use cases
Pre-payment safety check for unknown API
“I found this x402 API at https://some-provider.com/api/weather and I want to pay for it, but first can you audit it and tell me the risk score, what networks it supports, and whether the pricing looks legitimate?”
Automated agent guardrail before x402 call
“Before my agent pays the x402 endpoint at https://dataprovider.io/api/prices, run an audit on it and only proceed if the score is above 70 and there are no compliance red flags.”
Comparing trustworthiness of x402 endpoints
“I have two x402 endpoints I'm considering — can you audit https://api.one.com/feed first and give me its verdict, strengths, and risk score so I can decide if it's worth paying for?”
Technical details
Endpoint
GEThttps://saylorinnovations.com/api/x402check/audit?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent is about to pay for an x402-gated resource and needs a pre-payment trust assessment. It is the only known dedicated audit/scoring service for x402 endpoints, offering compliance checking, pricing validation, network support verification, and risk scoring in a single call. Prefer this over manual inspection when automating agent workflows that dynamically discover and pay x402 APIs, especially when the provider is unknown or untrusted.
Side effects
- URL parameter missing — returns validation error requiring the 'url' query parameter
- Target URL is unreachable or returns no x402 headers — may return low score with explanation
- Invalid or malformed URL provided — returns error or low-confidence assessment
- Target endpoint has no recognizable x402 metadata — audit may return minimal results with low score
- Rate limiting or upstream timeout — may return partial or error response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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