> For the complete documentation index, see [llms.txt](https://docs.unisat.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.unisat.io/developer-support/open-api-documentation/api-for-fractal-bitcoin/fractal-development-support-testnet.md).

# Fractal Development Support (testnet)

**Fractal Testnet Developer Notices**

* **Wallet Integration**: When integrating the UniSat wallet, please ensure you are using the **FRACTAL\_BITCOIN\_TESTNET** network.
* **Open-API Endpoint**: The Open-API endpoint has been updated. Developers should now use the following endpoint for all API requests:  <https://open-api-fractal-testnet.unisat.io>&#x20;
* Please apply for new API Key on our developer center <https://unisat.io/plans>&#x20;

These updates are essential for ensuring compatibility and optimal performance during the test phase. We encourage all developers to make the necessary adjustments to their integrations.