How to Capture Webhooks Without Webhook.site
Capture and inspect webhook payloads without Webhook.site. Use a persistent webhook catcher URL, inspect headers, and replay events to localhost.
August 15, 2026 · 8 min read · MockFlow Team
Why Leave Webhook.site?
Webhook.site is the default paste-a-URL tool in a lot of SaaS docs. It is fast. It is also easy to outgrow: temporary URLs expire, there is no replay to your real server, and there is no mock API next to the inspector.
If you searched for a webhook.site alternative, you probably need a webhook catcher that stays up, shows the full payload (including signatures), and lets you re-send the event without clicking “Send test webhook” again.
The Capture Workflow
- Create a free MockFlow account and a Request Catcher.
- Copy the public HTTPS URL.
- Paste it into the provider’s webhook settings.
- Trigger a test event and inspect headers, body, query, and IP.
- Replay the captured request to localhost or staging.
That is the whole webhook catcher loop. You do not need ngrok for the capture step, because MockFlow already has a public URL. Use replay when you want the payload on your machine.
Stripe and GitHub
For Stripe, add the catcher as an endpoint in Developers → Webhooks, or run stripe listen --forward-to https://api.mockflow.io/…. Inspect Stripe-Signature before you write verification code.
For GitHub, set the catcher as the webhook URL on a repo or organization. Push an empty commit or use “Redeliver” after you have captured one payload.
FAQ
Can I keep using Webhook.site for one-off tests?
Yes. Switch when you need persistence, replay, or a workspace you will open again tomorrow.
Where do I start?
Create a free account, then a Request Catcher. The product page walks through the first cURL request.
Capture webhooks on a URL that does not expire
Free webhook catcher with inspection and replay. No credit card.