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x-402 Webhook Callback Poller
x402
x-402 Webhook Callback Poller is a paid API for AI agents from api.x-402.online, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-09).
Long-poll a temporary public webhook URL to retrieve HTTP events (method, query, headers, body) that have been delivered to it
Price / call$0.005
Success—
StatusUnknown
How this service works
A temporary public webhook URL: give it to any service, then long-poll the events that arrived (method, query, headers, body). Free to receive and read, up to 100 events for 1 to 24…
Output
A list of up to 100 HTTP events received by the temporary webhook URL, each containing the request method, query parameters, headers, and body. Events are returned in arrival order and span up to the last 24 hours of activity.
Example use cases
Debug third-party callback delivery
“I gave a payment processor my temporary x-402 webhook URL to test their callback — can you poll it now and show me what they sent, including the headers and body?”
Verify webhook trigger from CI pipeline
“My CI pipeline is supposed to hit my temporary webhook after a build — can you long-poll the x-402 callback endpoint and tell me if any events came in with a GET request?”
Inspect OAuth redirect parameters
“I set up my temporary x-402 webhook as the redirect URI for an OAuth flow — can you fetch all the events that arrived and show me the query parameters they included?”
Technical details
Endpoint
GEThttps://api.x-402.online/v1/callbacks?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to inspect what a third-party service sent to a temporary callback URL — ideal for debugging integrations, verifying OAuth redirects, testing webhook delivery, or capturing payloads without standing up your own server. Prefer it over persistent webhook infrastructure when you need a quick, disposable listener with no setup.
Side effects
- No events received yet — webhook has not been called by any service
- Webhook URL expired (TTL exceeded 24 hours) — no events returned
- Event limit of 100 reached — oldest events may have been dropped
- Invalid or missing method parameter — request rejected
- Polling timeout if no events arrive within the long-poll window
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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