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Request Catcher vs Mockbin: catalog facts
Request Catcher	Mockbin
Free Free to use in the browser.	Free Free and open source, with no sign-up.
Web	Web
Choose a subdomain and start receiving requests immediately Catches requests sent to any path on the subdomain	Custom status, headers and body for a mock endpoint Generates mocks from an OpenAPI 3.x document
Only records requests; no responses, transforms or workflows Captured traffic passes through a public third-party service	Fixed responses rather than programmable logic Losing browser storage loses the list of your bins
Web application	Web application
Closed source	Open source
License not stated	License not stated
Not stated if an account is needed	No account needed
Needs internet	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.