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x402 Health Check – Coding Agent Context APIs
x402
x402 Health Check – Coding Agent Context APIs is a paid API for AI agents from x402-canary.nicolas-x402-16f380a7.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Checks whether a given URL is a reachable, valid x402 pay-per-call endpoint and returns protocol validity, latency, network, and canonical USDC configuration details.
Price / call$0.01
Success—
StatusUnknown
How this service works
Free need-to-tool routing plus pay-per-call npm docs and TypeScript API signatures, npm breaking-change diffs, JavaScript-rendered browser snapshots and deterministic coding-agent checks via AgentCash/x402.
Output
Returns a JSON object with a `data` field containing: HTTP status (402 expected), reachability boolean, latency in milliseconds, Base mainnet flag, x402 protocol version number, protocol validity boolean, bazaar declaration flag, canonical Base USDC flag, and resource-matches-target flag. Also includes a `meta.engine` field identifying the health engine used.
Example use cases
Validate new x402 API before integration
“Before I start using this coding agent API, can you check if https://x402.payai.network/api/base/paid-content is properly set up as an x402 endpoint — is it reachable, is the protocol valid, and is it running on Base mainnet?”
Monitor x402 endpoint uptime and latency
“Can you probe https://x402-canary.nicolas-x402-16f380a7.workers.dev/v1/x402/docs with a GET request and tell me if it's reachable, what its latency is, and whether the x402 protocol is valid?”
Check bazaar listing and canonical USDC config
“I want to list my API on the x402 bazaar — can you first verify that https://myapi.example.com/premium is correctly configured with canonical Base USDC and has been declared on the bazaar?”
Technical details
Endpoint
POSThttps://x402-canary.nicolas-x402-16f380a7.workers.dev/v1/x402/healthWhen to prefer
Use this endpoint when you need to programmatically verify that a specific URL implements the x402 pay-per-call protocol correctly before integrating it into an agent workflow, listing it on a marketplace, or triggering a payment. Prefer this over generic HTTP health checks when you specifically need x402 protocol validity, Base mainnet confirmation, USDC canonical config, or bazaar listing status.
Side effects
- URL is unreachable — reachable: false returned with no latency
- Target URL returns non-402 status — protocol_valid: false
- Endpoint is not on Base mainnet — base_mainnet: false
- Resource does not match target URL — resource_matches_target: false
- Invalid URL format in input — request validation error
- Network timeout reaching the target URL
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | |
| method | string |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {
"status": 402,
"reachable": true,
"latency_ms": 120,
"base_mainnet": true,
"x402_version": 2,
"protocol_valid": true,
"bazaar_declared": false,
"canonical_base_usdc": true,
"resource_matches_target": true
},
"meta": {
"engine": "x402-health"
}
}
}Tags
x402
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