> ## Documentation Index
> Fetch the complete documentation index at: https://docs.defindex.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Sandbox

> Testnet, where the money is fake and everything else is the same.

Everything in these docs runs on Stellar testnet with `?network=testnet`. Same API, same contracts, faucet money.

## What you need

|                      | Testnet                                                                                                            |
| -------------------- | ------------------------------------------------------------------------------------------------------------------ |
| API                  | `https://api.defindex.io`, with `?network=testnet` on every call                                                   |
| XLM for fees         | [Friendbot](https://laboratory.stellar.org/#account-creator?network=test)                                          |
| BlendUSDC to deposit | The faucet at [testnet.blend.capital](https://testnet.blend.capital), with a Freighter wallet set to Testnet       |
| Contract addresses   | [testnet.contracts.json](https://github.com/defindex-io/stellar-contracts/blob/main/public/testnet.contracts.json) |
| RPC                  | `https://soroban-testnet.stellar.org`                                                                              |

Your API key from the [Console](https://console.defindex.io) works on both networks.

## What differs from mainnet

* Assets are test tokens. BlendUSDC on testnet is not Circle USDC.
* Stellar resets testnet periodically and every address stops working when it does. The next scheduled reset is December 16, 2026. If an address fails, ask on [Discord](https://discord.gg/aV5jHwmsaj).
* Stable APY runs on mainnet only.

## Next

* [Quickstart](/integration-guide/quickstart), with `network=testnet`.
* [Create a Vault using the API](/integration-guide/creating-a-defindex-vault/using-the-api): a full testnet example in TypeScript.