First public release of API Dev Studio from the new release pipeline. If you tried an earlier build, this is the one to install: the app now keeps itself up to date.
What is API Dev Studio
A desktop app for API development that runs entirely on your machine. Mock APIs, catch webhooks, proxy real traffic and record it into replayable mocks. No cloud, no account, no telemetry.
Highlights in 0.5.1
- Auto-updater with signed releases. Check manually in Settings > Updates or let it check on launch. Download and install progress shown in app.
- Public API registry import: browse 50+ public APIs on apidevstudio.com/apis and import one into a project with a single click via deep link.
- Mock server with 4 response modes (static, sequential, random, conditional), 30+ template helpers, and callbacks.
- Webhook catcher with public URL tunneling.
- Proxy mode with recording: capture real API responses and turn them into mocks.
- MCP server with 26 tools so AI agents like Claude can drive your mocks.
- OpenAPI and Postman import, project export and sharing.
- 668 automated tests behind it all.
Downloads
| Platform | File |
|---|---|
| Windows installer | API.Dev.Studio_0.5.1_x64_en-US.msi |
| Windows setup (NSIS) | API.Dev.Studio_0.5.1_x64-setup.exe |
| macOS Apple Silicon | API.Dev.Studio_0.5.1_aarch64.dmg |
| macOS Intel | API.Dev.Studio_0.5.1_x64.dmg |
| Linux AppImage | API.Dev.Studio_0.5.1_amd64.AppImage |
| Linux Debian/Ubuntu | API.Dev.Studio_0.5.1_amd64.deb |
Heads up: binaries are not yet code-signed with an OS vendor certificate, so Windows SmartScreen and macOS Gatekeeper will warn on first launch. Install steps for each platform: https://docs.apidevstudio.com/getting-started/installation/
Pricing
Free tier: 3 projects, 10 endpoints each, 500 request history. Pro is a one-time purchase, currently in early access pricing: https://apidevstudio.com/#pricing
Found a bug? Open an issue right here in this repository.