Mailgun Webhook Tester
Mailgun puts signature fields IN the body and event data nested under event-data. HookRay surfaces event, recipient, timestamp, subject line, and the signature token so the meaningful state is visible top-level.
What HookRay Highlights from a Mailgun Webhook
event-data.event"delivered"delivered, opened, clicked, complained, failed, etc.
event-data.recipient"customer@example.com"event-data.timestamp1763583600event-data.message.headers.subject"Your order has shipped"From the original message headers — useful for filtering by campaign.
signature.token"77b1d2a3c4"Part of the HMAC over timestamp + token. Production failure events additionally carry an event-data.id and event-data.severity.
{
"signature": {
"timestamp": "1763583600",
"token": "77b1d2a3c4",
"signature": "9ad98b88077c12af0abc12345def6789"
},
"event-data": {
"event": "delivered",
"timestamp": 1763583600,
"recipient": "customer@example.com",
"message": {
"headers": {
"subject": "Your order has shipped"
}
}
}
}Same payload, no parsing — you scroll, you scan, you guess.
Test a Mailgun Webhook in 30 Seconds
- 1
Get a free webhook URL
Click Start Testing — HookRay generates an instant URL like
https://hookray.com/api/hook/abc123. No signup. - 2
Paste it into Mailgun
Open the Mailgun webhook settings (docs), paste the HookRay URL as your endpoint, and pick the events you want to receive.
- 3
Trigger an event, inspect the payload
Trigger a test event in Mailgun. HookRay captures the payload for raw inspection and one-click replay. The field guide above shows the 5 Mailgun paths the upcoming parser will surface — use it as a cheat sheet while you wire up your handler.
HookRay vs Generic Webhook Testers
| Capability | webhook.site | HookRay |
|---|---|---|
| Free tier | ✓ 100 req | ✓ 100 req/mo |
| No signup required | ✓ | ✓ |
| Mailgun-specific field parsing | — | |
| One-click replay | ✓ (Pro) | ✓ Free |
| 30-day history | $9/mo | $9/mo |
| Persistent URLs | $9/mo | $9/mo |
See the broader comparison in The 7 Best Webhook Testing Tools (2026).
Start Testing Mailgun Webhooks Now
Free, no signup. Raw capture and replay included; Mailgun smart parsing previewed above.
Get a Free Webhook URL