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x402 Payment Debug
x402
x402 Payment Debug is a paid API for AI agents from x402.dailyelo.com, paid per call via x402, $0.25/call, status unknown (last checked 2026-10-11).
Validates whether a real x402 payment to a given endpoint would be accepted by the CDP facilitator, without moving any funds
Price / call$0.25
Success—
StatusUnknown
How this service works
Your 402 envelope can pass every static check and still not get you paid. We build a real signed payment at your listed price and submit it to the CDP facilitator verify endpoint, which checks signature, requirements and the on-chain transfer simulation. Nothing settles, so no money moves. You get back whether a real payment would be accepted, and if not, the facilitator own reason verbatim. Pass ?url= or ?domain=.
Output
Returns whether a real signed payment at the endpoint's listed price would be accepted by the CDP facilitator, including the facilitator's verbatim rejection reason if validation fails, covering signature validity, payment requirements compliance, and on-chain transfer simulation outcome.
Example use cases
Pre-launch x402 integration check
“I just set up x402 on my endpoint at payments.myapp.com and I want to make sure it'll actually accept payments before I announce it — can you run a payment simulation and tell me if the CDP facilitator would approve it?”
Diagnosing why buyers aren't paying
“My x402 endpoint at api.datatool.io is listed in the Bazaar but nobody has paid me yet — can you debug it and tell me verbatim what the facilitator returns when it tries to verify a payment?”
Validating x402 config after an update
“I just changed my pricing and signature setup on x402.myplatform.com — can you run a payment debug to confirm the new config passes the CDP facilitator's signature and on-chain simulation checks?”
Technical details
Endpoint
GEThttps://x402.dailyelo.com/v1/payment/debug?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to diagnose why an x402 endpoint is failing to receive payments or hasn't been purchased, and you want the CDP facilitator's own verdict rather than a static lint check. Prefer it over manual inspection when you want to catch signature errors, misconfigured payment requirements, or on-chain simulation failures without risking real funds.
Side effects
- No URL or domain provided — returns market-wide stats instead of endpoint-specific result
- Endpoint does not return a valid 402 envelope — cannot construct a test payment
- CDP facilitator unreachable — upstream error propagated
- Domain or URL is malformed — query param rejected
- Endpoint's listed price is missing or unparseable — payment construction fails
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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