Twin-Bridge is a tool that helps you capture, replay, and compare (diff) your APIs. It lets you build and test your applications without needing an internet connection. The app learns from your real API traffic and creates "twins" that simulate the actual services. This can speed up your development and testing process.
If you use APIs for your work or hobby, Twin-Bridge can help you see how your apps behave under different conditions, catch errors early, and save time.
Before installing, check that your Windows PC meets these basic requirements:
- Windows 10 or newer
- 4 GB of RAM or more
- 500 MB free disk space
- Internet connection for initial download (not needed after)
- Administrator rights to complete installation
The app uses Electron, which runs on most Windows setups without extra steps.
Follow these steps carefully to download and open Twin-Bridge on your Windows PC. No coding skills are needed.
Click this link to visit the official download page:
You will see the GitHub repository where the app is hosted.
On the GitHub page:
- Look for the Releases section on the right sidebar or under the repository name.
- Click the most recent release version (usually named with a date or version number).
- Scroll down until you find the Windows installation file. It should end with
.exe.
Click the Windows .exe file to start downloading. It might be named something like TwinBridgeSetup.exe.
The download could take a few minutes, depending on your internet speed.
- Open the folder where your browser saved the file (usually the Downloads folder).
- Double-click the installer file to start setup.
- If Windows asks, choose "Run" or "Yes" to allow the program to make changes.
- Follow the on-screen prompts:
- Agree to the license terms.
- Choose an install location or accept the default.
- Click "Install" to begin.
The process completes quickly.
After installation:
- Find the Twin-Bridge icon on your desktop or start menu.
- Double-click to open the app.
- The main window will appear, ready for you to start using its features.
Twin-Bridge helps you with three main tasks:
The app listens to your actual API traffic. It records requests and responses to create a full picture of how your app talks to other services.
- Open the "Capture" tab.
- Click "Start" to begin recording.
- Use your app normally. Twin-Bridge will save the data.
- Click "Stop" when done.
You can play back your recorded API traffic. This lets you test your app without connecting to the real services. It helps find bugs and check behavior faster.
- Open the "Replay" tab.
- Load a saved capture file.
- Start the replay.
- Run your tests or app as usual, pointing it to the local Twin-Bridge server.
Twin-Bridge can show differences between two API sessions. This helps spot regressions or unintended changes.
- Open the "Diff" tab.
- Select two capture sessions.
- View the side-by-side comparison.
- Investigate any differences in requests or responses.
Twin-Bridge lets you fine-tune how it captures and replays traffic.
- Proxy Settings: Twin-Bridge can act as a proxy between your app and the internet. Adjust the proxy port if needed.
- Schema Support: The app works with OpenAPI specs. You can import your API definitions to validate traffic.
- Mock Server Options: Set rules for how the app responds when replaying. Choose strict matching or flexible to handle variations.
- Storage: Manage where capture files are saved and how long they are kept.
If you run into problems:
- Ensure you run the app with administrator rights.
- Check that no other programs block your network ports (like firewalls).
- Restart Twin-Bridge if it stops responding.
- Verify you downloaded the correct Windows installer.
- Look for updates on the GitHub releases page in case of fixes.
- Use the Issues tab on the GitHub page to report bugs.
- Read through the existing issues for common questions.
- The app includes basic help sections accessed from the menu bar.
To get the latest features and fixes:
- Visit the GitHub releases page again.
- Download the newest Windows installer.
- Run it to overwrite the old version.
- Your settings and captures will remain intact.
Click here to visit the main page and grab the latest version for Windows: