# x402 Radar Conformance Probe

> x402 Radar Conformance Probe is a paid API for AI agents from influenced-conducting-temp-contributors.trycloudflare.com, paid per call via x402, $0.002/call, status down (last checked 2026-10-03).

Checks whether a given URL correctly implements the x402 payment protocol, returning handshake validity, price, asset, network, payTo address, and latency.

## Facts

- Endpoint: POST https://influenced-conducting-temp-contributors.trycloudflare.com/api/check?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: down
- Last checked: 2026-10-03
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-radar-conformance-probe-03b69f72
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hXzl1volyNBr5twpMfvsr

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability x402-radar-conformance-probe-03b69f72 -d '<json body>'
```

Example prompt: Before I pay, can you check whether https://api.exa.ai/search is a legitimate x402 endpoint — tell me if the handshake is valid, what it costs, and which network and wallet it pays to?

## When to prefer this

Use this endpoint when an AI agent needs to verify an x402 payment endpoint before committing funds, when integrating with an unknown x402 service and wanting to confirm correct protocol implementation, or when debugging why an x402 handshake is failing. Prefer this over trusting directory listings alone — it performs a live probe of the actual endpoint.

## Known failure modes

- URL is unreachable or times out — alive:false returned
- Endpoint returns 402 but with malformed or missing x402 headers — valid_handshake:false
- Endpoint does not return 402 at all — x402:false
- Network or asset fields missing from response — incomplete handshake data
- Cloudflare tunnel hosting the probe itself is temporarily unavailable

## 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 endpoint is alive, whether it correctly responds with HTTP 402 and a valid x402 handshake, the payment scheme, network (e.g. base), asset, payTo wallet address, atomic price, estimated price in USD if USDC, and round-trip latency in milliseconds.

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "example": {
  "x402": true,
  "alive": true,
  "scheme": "exact",
  "status": 402,
  "checked": "https://api.exa.ai/search",
  "network": "base",
  "latency_ms": 340,
  "valid_handshake": true,
  "price_usd_if_usdc": 0.007
 },
 "properties": {
  "at": {
   "type": "string"
  },
  "x402": {
   "type": "boolean"
  },
  "alive": {
   "type": "boolean"
  },
  "asset": {
   "type": "string"
  },
  "payTo": {
   "type": "string"
  },
  "scheme": {
   "type": "string"
  },
  "status": {
   "type": "number"
  },
  "checked": {
   "type": "string"
  },
  "network": {
   "type": "string"
  },
  "latency_ms": {
   "type": "number"
  },
  "price_atomic": {
   "type": "string"
  },
  "x402_version": {
   "type": "number"
  },
  "valid_handshake": {
   "type": "boolean"
  },
  "price_usd_if_usdc": {
   "type": "number"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-radar-conformance-probe-03b69f72/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from influenced-conducting-temp-contributors.trycloudflare.com](https://www.zero.xyz/host/influenced-conducting-temp-contributors.trycloudflare.com/llms.txt)