Mock Webhook Payload Generator

How to use

1. 1️⃣
   Choose your options above
2. 2️⃣
   Click Generate
3. 3️⃣
   Copy your result

Detailed instructions

1. Select the service you want to simulate from the Service dropdown (GitHub, Stripe, Slack, or Generic).
2. Set the count field to the number of distinct payloads you need, then click Generate.
3. Review each generated payload in the output list and click Copy on the one you want to use.
4. Paste the JSON into curl, Postman, or a test fixture file to send it to your local webhook endpoint.
5. Adjust the service or count and regenerate to get fresh random values for additional test scenarios.

Use Cases

• •Feeding a local Express webhook endpoint with Stripe payment_intent payloads before a single card is charged
• •Loading GitHub push event fixtures into a Jest test suite for deterministic, repeatable CI runs
• •Populating a Postman collection with varied Slack event bodies to share across a backend team
• •Reproducing a production parsing bug by replaying a controlled payload against your handler in isolation
• •Generating sample payloads to illustrate webhook event structure in API onboarding docs or a README

Tips

• →Generate three or four Stripe payloads at once to get varied amounts and IDs — good for testing currency formatting edge cases.
• →Paste a GitHub push payload into a fixture file alongside your unit tests so CI never needs a live GitHub connection.
• →When debugging signature verification failures, isolate the problem by first confirming your handler accepts the payload body itself using one of these mocks with signature checks temporarily disabled.
• →The generic payload type is a fast starting point for internal microservice events — rename the event_type field to match your own naming convention.
• →If your framework logs incoming webhook bodies, replace real production payloads in your logs with generated mocks when sharing debug output with teammates to avoid leaking customer data.
• →Compare the generated schema against the service's official event reference once before writing your handler — this confirms which fields you can safely rely on versus fields that may be absent.

FAQ