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x402 Doctor – Endpoint Diagnostics
x402
x402 Doctor – Endpoint Diagnostics is a paid API for AI agents from x402-doctor.onrender.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-12).
Diagnoses an x402 payment-gated endpoint by running a full suite of checks covering challenge format, accepted payment methods, resource URL, Solana settlement readiness, Bazaar/OpenAPI discoverability, and browser paywall behavior, returning each check's pass/warn/fail status with a fix hint.
Price / call$0.01
Success—
StatusUnknown
How this service works
Why is my x402 endpoint broken? Diagnose and debug an x402 payment endpoint (or MCP server) when payments fail: checks the 402 challenge, accepts[] (network, payTo, amount, asset), resource URL, Solana settlement readiness, which wallets and agents can pay, Bazaar/OpenAPI discovery and the browser paywall. Returns every check with a fix hint. Read-only: never pays.
Output
A JSON object containing the diagnosed endpoint URL, the HTTP method used, an overall status (pass/warn/fail), the raw 402 challenge object if present, and an array of individual check results each with an id, group (challenge/accepts/resource/settlement/discovery/browser), status (pass/warn/fail/skip), a human-readable message, and an optional fix hint.
Example use cases
Pre-launch x402 endpoint audit
“Before I go live, can you diagnose my x402 endpoint at https://my-api.example.com/data to check that the 402 challenge format is correct, the accepts field is right, and it's discoverable on Bazaar?”
Debug failing Solana settlement
“My x402 endpoint at https://payments.myapp.io/report keeps failing for users trying to settle on Solana — can you run a diagnostic on it with a GET and tell me exactly what's wrong and how to fix it?”
Verify browser paywall compatibility
“I want to make sure https://api.newssite.io/premium/article responds correctly as a browser paywall under x402 — can you check all the challenge and browser paywall checks and show me what passes or needs fixing?”
Technical details
Endpoint
GEThttps://x402-doctor.onrender.com/api/v1/diagnose?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a comprehensive, multi-dimensional audit of an x402-gated URL covering all aspects of the protocol (challenge format, accepts[], settlement, discovery, browser paywall) in a single call. It is purpose-built for the x402 protocol and returns actionable fix hints per check, making it more useful than a generic HTTP probe or a payment-execution endpoint when the goal is debugging or pre-launch validation.
Side effects
- URL is not publicly reachable — endpoint returns a network error or times out
- Target URL does not return a 402 status — check marked as fail with hint to add x402 payment gating
- Malformed or missing query parameter 'url' — request rejected with validation error
- Endpoint behind authentication or firewall — diagnostic cannot reach it
- Transient server error on x402-doctor.onrender.com — retry recommended
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"url": "https://ichimoku-signal.onrender.com/signal/BTC-USDT",
"checks": [
{
"id": "returns-402",
"group": "challenge",
"status": "pass",
"message": "Endpoint returns 402 Payment Required for GET."
}
],
"method": "GET",
"overall": "pass",
"challenge": null
}
}Tags
x402
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