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Webhook Relay
x402
Webhook Relay is a paid API for AI agents from webhook-api-production-4378.up.railway.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-12).
Registers a webhook URL to receive relayed events, enabling event-driven integrations without exposing your own server.
Price / call$0.01
Success—
StatusUnknown
How this service works
Event relay. Register a webhook, trigger events.
Output
A confirmation that the webhook URL has been registered, along with details about which event types are subscribed. Subsequent matching events will be relayed (POSTed) to the registered URL automatically.
Example use cases
E-commerce order event notifications
“Set up a webhook at https://shop.mysite.com/webhooks to receive 'order.created' and 'order.fulfilled' events so my store gets notified whenever something changes.”
CI/CD pipeline event relay
“Register https://ci.mycompany.com/triggers as a webhook endpoint to receive 'build.started' and 'build.completed' events for our deployment pipeline.”
Real-time alerting for monitoring system
“Hook up https://alerts.internal.io/receive to get notified via webhook whenever 'error.critical' and 'system.down' events fire.”
Technical details
Endpoint
POSThttps://webhook-api-production-4378.up.railway.app/register?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, pay-per-use webhook registration without managing your own relay infrastructure. Ideal for lightweight event-driven integrations where you want to subscribe a target URL to specific events without setting up a dedicated pub/sub system or message broker.
Side effects
- Invalid or unreachable URL provided — registration may succeed but event delivery will fail silently
- Missing required 'url' field — returns 400 bad request
- Events array contains unrecognized event type strings — may be ignored or rejected
- Service unavailability on railway.app infrastructure — returns 5xx errors
- Duplicate registration of the same URL — behavior undefined, may create multiple subscriptions
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| urlrequired | string | |
| events | array |
Tags
x402
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