Free & open source · MIT

The free, open source API client that lives in Git

Tiger is a git-native API client for macOS, Windows and Linux, and a local-first alternative to Postman, Insomnia and Bruno. Your collections are plain-text .tiger files in your own Git repo, every request runs on your machine, and a built-in MCP server lets AI assistants such as Claude and Cursor run your saved requests. No account, no cloud, no lock-in.

Get started → Get it from Microsoft Store Download for macOS Download for Linux Star on GitHub

No install: Windows portable (zip) · Windows Setup exe · macOS zip · Linux tar.gz

Version 0.7.0 · All downloads · Install guide

Tiger API client workspace: a collection sidebar with a GET request open and tabs for Params, Body, Headers, Auth, Save values, Scripts and tests, Notes, Code snippet and Load test — The Tiger workspace with a demo collection.

Why Tiger

Git-native. Collections are human-readable text files. Diff them, branch them, review them in a pull request.
Local-first and offline. No backend and no sync service. Requests, tokens and responses stay on your machine.
No account. Download and go. Free for personal and commercial use under the MIT license.
Built for AI. The bundled MCP server exposes your saved requests as tools any MCP client can call.
Broad import support. Bring collections over from Postman, Insomnia, Bruno, OpenAPI, WSDL/SOAP or a curl command.
Cross-platform. Native desktop builds for macOS, Windows and Linux.
Speaks your language. English, 中文 (Simplified Chinese), हिन्दी (Hindi), Español, Français and العربية (Arabic, right to left). Tiger starts in your system language and switches live from Settings.

What is in Tiger 0.7.0

Save values to pass a response value into the next request, and Scripts & tests with pre-request and post-response JavaScript.
Collection runner and Load test for pass/fail runs and p50/p95 timings.
Team sync to share a collection through Git with one Sync with team button.
AI assistants (MCP) so Claude, Cursor and other MCP clients can list and run your requests.
Requests and auth including OAuth 2.0, GraphQL, multipart, proxies and client certificates (mTLS).
Environments and secrets with masked secret variables.

Tiger Team sync card for a Payments API collection showing three local changes and a Sync with team button — Team sync shows what changed and shares it with one click.

Download Tiger

Free, no sign-up. Every build is on GitHub Releases.

Windows: Microsoft Store (recommended): signed by Microsoft, no warning, updates itself. No-install / advanced: Setup installer, portable EXE or portable zip (on first run click More info, then Run anyway).
macOS: Apple Silicon or Intel DMG, signed and notarized.
Linux: AppImage or .deb for Debian and Ubuntu.

The Windows build may show a SmartScreen "unknown publisher" prompt on first run; here is how to click through it.

Switching from Postman, Insomnia or Bruno

Export from your current tool and import the file into Tiger. Folders, requests, variables and auth carry over, and the result is a folder you can commit.

Importing collections: Postman, Insomnia, Bruno, OpenAPI, WSDL/SOAP and curl.
Postman to Tiger migration guide.
A free Postman alternative and the full comparison with Bruno, Insomnia and Hoppscotch.

Explore the docs

What is Tiger

The five-minute tour of how Tiger works and who it is for.

Install

macOS, Windows (installer or portable) and Linux builds.

Your first request

Create a collection, send a request, save it to Git.

MCP server

Let Claude and other assistants run your saved requests.

FAQ

Cost, privacy, offline use, platforms and migration.

MCP API client

Use cases and example prompts for AI-driven API work.