Yaak
Test REST, GraphQL, gRPC, WebSocket and SSE APIs from a local-first desktop client.
What’s included for free?
Source can be built and used free for personal and commercial work. Prebuilt binaries are free for personal use and require a licence for commercial use.
Where it runs: Local install
Provider information ↗Checked 2026-10-12
Before you use it
Source is MIT. Prebuilt downloads use separate pricing terms: personal use is free, commercial use requires a paid binary licence.
Provider terms can change. Check current pricing and usage rights before starting a project.