Yaak

About Yaak

Yaak is a local-first desktop API client covering HTTP, GraphQL, gRPC, WebSocket and SSE requests, positioned against the hosted API clients that have progressively moved workspace state into their own cloud and required an account to open the app. Yaak works offline with no account at all, stores data locally, encrypts secrets, and syncs through plain files committed to Git rather than a proprietary sync service — which means a team's request collection lives in the repository next to the code it tests, reviews through pull requests, and does not disappear if a vendor changes its plan. The AI-relevant additions are two. The first is readable LLM API responses: streaming completion responses from model APIs are rendered legibly instead of arriving as a wall of server-sent-event frames, which is a genuine daily annoyance when debugging an LLM integration. The second is a CLI built specifically for agents, so a coding agent can drive the same saved requests a human uses in the GUI. The project describes itself as zero telemetry and private by default. It is open source, ships for macOS, Linux and Windows, and is free for personal use — a licence is required only when using it at work.

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