Simulation run on this device. Scenario values are not sent anywhere — the engine is fully local.
agents studio · free
Webhook Inspector & Replayer
Capture webhook payloads, edit, and replay them against your handler.
What did that delivery actually contain?
Engine 1.0.0 · studio
0900
- Fields
- 5
- Top-level keys
- 4
- Signed
- no
| Field | Value |
|---|---|
| id | "evt_1" |
| type | "invoice.paid" |
| created | 1710000000 |
| data.amount | 4200 |
| data.currency | "usd" |
- highNo signature field
The payload has no verifiable signature header/field — a replayer cannot authenticate it.
- mediumReplay age 600s exceeds the 5-min window
Most providers reject events older than 5 minutes; a replayed event this old must be forced.
replay: re-send with created bumped to now and a freshly computed signature for the named scenario
Replay = same body, new signature + timestamp. Mutate one field at a time to reproduce the handler bug.
Method
- Parses the payload, flattens nested fields, and checks for a signature and timestamp within the freshness window.
- Replay = same body with a new timestamp and signature; mutate one field at a time to reproduce the handler bug.