Request Bin

Free Webhook Tester

A webhook tester is a temporary endpoint for sending test webhook requests and inspecting exactly what arrived. Generate a request bin, capture JSON payloads, review headers and query strings, then copy replay examples for your debugging notes.

This tool is for short development sessions. Do not send production secrets or customer data. For production inbound email delivery, MailParse receives messages, parses MIME, and posts structured JSON to your webhook.

Temporary endpoint

Send GET, POST, PUT, PATCH, or DELETE requests to this URL.

Webhook endpoint

https://www.mailparse.dev/api/tools/webhook-tester/mp-loading

Capture status

Generate a bin to start testing.

Replay with cURL

curl -X POST 'https://www.mailparse.dev/api/tools/webhook-tester/mp-loading?source=docs' \
  -H 'Content-Type: application/json' \
  -H 'X-MailParse-Test: true' \
  --data '{
  "event": "email.parsed",
  "messageId": "msg_2Wk7Jp9N4",
  "from": "alerts@example.com",
  "to": "inbound@mailparse.dev",
  "subject": "Webhook tester sample",
  "attachments": 2,
  "receivedAt": "2026-06-07T19:15:00.000Z"
}'

Replay with fetch

await fetch("https://www.mailparse.dev/api/tools/webhook-tester/mp-loading?source=docs", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "X-MailParse-Test": "true"
  },
  body: JSON.stringify({
  "event": "email.parsed",
  "messageId": "msg_2Wk7Jp9N4",
  "from": "alerts@example.com",
  "to": "inbound@mailparse.dev",
  "subject": "Webhook tester sample",
  "attachments": 2,
  "receivedAt": "2026-06-07T19:15:00.000Z"
})
});

How to test a webhook

Generate a request bin

Create a unique temporary endpoint for this browser session.

Send a webhook request

Point your app, cURL, or webhook provider at the generated endpoint.

Inspect the payload

Review request method, headers, query string, raw body, parsed JSON, and size.

Replay or document it

Copy the cURL or fetch example and save the captured payload for debugging notes.

Frequently asked questions

What is a webhook tester?

A webhook tester gives you a temporary endpoint where you can send test webhook requests, then inspect the method, headers, query string, body, and JSON payload that arrived.

How long are webhook test requests stored?

This free tester keeps recent requests in temporary server memory for short debugging sessions. Use it for development tests, not permanent logging or production audit records.

Can I test JSON webhooks?

Yes. Send a request with Content-Type application/json and the inspector will parse the JSON body, show raw text, and provide replay examples.

Should I send secrets to a public webhook tester?

No. Never send production secrets, access tokens, passwords, or customer data to a public test endpoint. Use sample payloads or redacted development events.

How is this different from MailParse webhooks?

This page is a temporary debugging tool. MailParse is the production service for receiving inbound email, parsing MIME, and delivering structured JSON to your webhook.

Need production email webhooks?

MailParse gives every inbox a reliable webhook destination with structured JSON, attachments, authentication results, and retry-friendly delivery for real applications.

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