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ATAC vs ArdorQuery: catalog facts
ATAC	ArdorQuery
Free Free and open source under the MIT licence.	Free Free and open source under GPL-3.0.
Windows, macOS, Linux, Command line	Linux
Full API client inside the terminal Optional Vim key bindings	Tests REST, HTML, image, GraphQL, and OData endpoints Shows requests as readable, color-coded lines
Still working toward its 1.0 release No graphical interface for people who prefer a mouse	Available for Linux
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: GPL-3.0
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 September 23, 2026	Official website Full listing and sources Checked October 8, 2026

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