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WebHook Tester vs Mockbin: catalog facts
WebHook Tester	Mockbin
Free Free to use; the source code is published on GitHub.	Free Free and open source, with no sign-up.
Linux, Self-hosted	Web
Runs on your own server, so payloads stay in-house Docker, Compose and Helm deployment files included	Custom status, headers and body for a mock endpoint Generates mocks from an OpenAPI 3.x document
You have to host and maintain it yourself In-memory storage means captured requests are not kept long term	Fixed responses rather than programmable logic Losing browser storage loses the list of your bins
Self-hosted	Web application
Closed source	Open source
License not stated	License not stated
No account needed	No account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.