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s2ar x402 Endpoint Inspector
x402
s2ar x402 Endpoint Inspector is a paid API for AI agents from api.s2ar.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-11).
Probes a given HTTPS endpoint for its x402 payment-wall properties — 402 status, accepted payment methods, price, Bazaar extension, and CDP verdict — returning a signed, verifiable record.
Price / call$0.005
Success—
StatusUnknown
How this service works
Inspect an x402 endpoint — its 402, accepts, price, Bazaar extension, CDP verdict; a signed record. GET ?resource=
Output
A signed record containing: whether the endpoint returns a 402, the accepted payment schemes, the listed price, details of any Bazaar extension, and the CDP (Coinbase Developer Platform) verdict. The signature allows anyone to independently verify the inspection result.
Example use cases
Discover API pricing before integrating
“Before I start using this API at https://api.thirdparty.dev/v1/generate, can you check its x402 payment wall — what does it cost, what does it accept, and is it listed on Bazaar?”
Verify a payment wall is correctly configured
“I just deployed an x402 paywall on https://api.myservice.io/data — can you probe it and give me a signed record confirming the 402 is set up correctly, the price is right, and the CDP verdict looks good?”
Audit a competitor's x402 pricing
“Look up the x402 payment terms for https://api.competitor.io/v2/search — I want to see the exact price they charge, which payment schemes they accept, and what Bazaar says about them.”
Technical details
Endpoint
GEThttps://api.s2ar.dev/x402/v1/x402/inspect?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to programmatically discover or verify the payment terms of any x402-compliant API before calling it, when you want an auditable signed record of those terms, or when you need to determine if an endpoint is listed on Bazaar and has received a CDP verdict. It is the authoritative inspection tool for the x402 protocol ecosystem.
Side effects
- Resource URL is not reachable — endpoint may be offline or behind a firewall
- Resource URL does not return a 402 — not an x402-compliant endpoint
- Invalid or malformed URL in the resource parameter
- Requested checks subset doesn't match available check identifiers
- Timeout when probing a slow upstream endpoint
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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