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CocoaRestClient vs Advanced REST Client: catalog facts
CocoaRestClient	Advanced REST Client
Free Free and open source.	Free Free to download; the source is published on GitHub.
macOS	macOS
Native Cocoa app with low memory use Pretty prints JSON and XML responses	Dedicated desktop app for manual HTTP and REST testing Source code is public and the repository is still active
macOS only Fewer collaboration and scripting features than larger API platforms	No releases published on the GitHub releases page License is not clearly identified in the repository metadata
Downloadable app	Downloadable app
Open source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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