# API Suite Fundamentals

The following sections are general information required for using the Flute API suite.

 - [baseURL Environments](https://developer.flute.com/api-reference/v2/flute-v2/api-suite-fundamentals/baseurl-environments.md): # baseURL Environments Flute provides different environments to run endpoints. **Sandbox** The sandbox environment is for development and testing. No payments, charges, or invoices will be enforced. I
 - [OAuth Token baseURLs](https://developer.flute.com/api-reference/v2/flute-v2/api-suite-fundamentals/oauth-token-baseurls.md): # OAuth Token baseURLs The OAuth token endpoint (used to generate an API token) uses its own base URL, separate from the API baseURLs above. **Sandbox** Endpoint: `POST https://sandbox.oauth.api.flut
 - [Payment Flow](https://developer.flute.com/api-reference/v2/flute-v2/api-suite-fundamentals/payment-flow.md): # Payment Flow The following is a generalized workflow.