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x402 Endpoint Safety Verifier
x402
x402 Endpoint Safety Verifier is a paid API for AI agents from judicious-earnest-vaporware.replit.app, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-29).
Checks whether a given x402 payment endpoint is safe to pay by evaluating liveness, 402-compliance, payTo/price sanity, and landmine flags, returning a safety verdict of SAFE, CAUTION, SUSPECT, or DEAD.
Price / call$0.005
Success—
StatusUnknown
How this service works
Checks whether an x402 endpoint is safe to pay: liveness, 402-compliance, payTo/price sanity, landmine flags; returns SAFE/CAUTION/SUSPECT/DEAD
Output
A safety verdict of SAFE, CAUTION, SUSPECT, or DEAD for the target x402 endpoint, along with details on liveness, 402-compliance, payTo/price sanity checks, and any landmine flags detected.
Example use cases
Example prompt
“Before paying that x402 API, can you safety-check https://some-api.example.com/data — I want to know if it's SAFE, CAUTION, SUSPECT, or DEAD before my agent sends any USDC?”
Technical details
Endpoint
GEThttps://judicious-earnest-vaporware.replit.app/verify?utm_source=zero.xyzWhen to prefer
Use this endpoint before your agent pays any x402 micropayment endpoint, especially when the endpoint was discovered dynamically or from an untrusted source. It is purpose-built for x402 safety screening with liveness checks, compliance validation, and fraud-signal detection — prefer it over generic uptime monitors or manual inspection when you need a structured SAFE/CAUTION/SUSPECT/DEAD verdict before committing funds.
Side effects
- Target URL unreachable — endpoint may return DEAD verdict
- Target does not respond with HTTP 402 — flagged as non-compliant
- Missing or malformed target query parameter — returns 400 error
- Target has suspicious payTo address — returns SUSPECT with flags
- Price anomaly detected on target — returns CAUTION or SUSPECT
- Verifier service itself is down — no response from /verify
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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