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x402 Radar Conformance Probe
x402
x402 Radar Conformance Probe is a paid API for AI agents from remind-host-lots-rouge.trycloudflare.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Checks whether a given URL serves a valid x402 payment handshake and returns its price, asset, network, payTo address, and latency.
Price / call$0.002
Success—
StatusUnknown
How this service works
Live x402 conformance probe: url=<endpoint>, returns whether it serves a valid 402 handshake, actual price/asset/network/payTo, latency. Verify before you pay. By x402 Radar.
Output
Returns a JSON object indicating whether the probed URL is alive, x402-compliant, and serving a valid 402 handshake. Includes the detected price in USD (if USDC), atomic price, asset type, blockchain network, payTo wallet address, x402 scheme (e.g. 'exact'), x402 protocol version, HTTP status code returned, and round-trip latency in milliseconds.
Example use cases
Pre-payment x402 conformance check
“Check whether https://api.someservice.com/inference actually serves a valid x402 handshake before I integrate it — I need to know the price, network, asset, and payTo address.”
Comparing x402 endpoints by latency
“Probe https://api.exa.ai/search for me and tell me its x402 latency and whether the handshake is valid — I'm trying to compare response times across a few paid APIs.”
Debugging a broken x402 integration
“Something seems off with https://myapp.com/api/generate — can you check if it's alive and returning a proper x402 402 status with a valid scheme and price?”
Technical details
Endpoint
POSThttps://remind-host-lots-rouge.trycloudflare.com/api/checkWhen to prefer
Use this endpoint when an AI agent needs to verify that a third-party x402-enabled API is live and correctly configured before committing a payment. It is the right choice when you want to inspect the price, asset, network, and payTo address of an x402 endpoint without actually paying. Prefer this over manually parsing 402 responses yourself, or when building automated pipelines that must gate payment execution on valid handshake confirmation.
Side effects
- Probed URL is unreachable — alive: false, no payment data returned
- URL does not serve a 402 status — x402: false, valid_handshake: false
- Malformed or non-conformant 402 response — valid_handshake: false with partial fields
- Network timeout leading to high latency_ms or missing response
- Input URL is invalid or missing — request rejected with error
- Transient Cloudflare tunnel instability causing probe failures
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| at | string | |
| x402 | boolean | |
| alive | boolean | |
| asset | string | |
| payTo | string | |
| scheme | string | |
| status | number | |
| checked | string | |
| network | string | |
| latency_ms | number | |
| price_atomic | string | |
| x402_version | number | |
| valid_handshake | boolean | |
| price_usd_if_usdc | number |
Tags
x402
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