> For the complete documentation index, see [llms.txt](https://docs.autentique.com.br/api/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.autentique.com.br/api/integration-basics.md).

# Integration basics

- [Using Altair](https://docs.autentique.com.br/api/integration-basics/altair.md): Altair is an application for running GraphQL queries/mutations. With it, you can build and check the results of requests on the web before integrating them into your code.
- [Sandbox/tests](https://docs.autentique.com.br/api/integration-basics/sandbox-testes.md): A great way to run tests on the platform without extra costs or using up your free documents.
- [Webhooks](https://docs.autentique.com.br/api/integration-basics/webhooks.md): Receive events from your organization on Autentique through your webhook endpoints.
- [Webhooks (deprecated)](https://docs.autentique.com.br/api/integration-basics/webhooks-1.md): How to set up Webhooks and receive document status notifications
- [Error messages](https://docs.autentique.com.br/api/integration-basics/mensagens-de-erro.md): Examples of error messages or validations returned by the API and what they are
- [OAuth 2.0](https://docs.autentique.com.br/api/integration-basics/oauth2.md): Let users authorize your integration to access the Autentique API on their behalf.
- [Creating an OAuth application](https://docs.autentique.com.br/api/integration-basics/oauth2/creating-an-oauth-application.md): Create and configure an OAuth application in the Autentique dashboard.
- [Authorizing a user](https://docs.autentique.com.br/api/integration-basics/oauth2/authorizing-a-user.md): Send the user to Autentique, request permissions, and validate the authorization response.
- [Obtaining and using tokens](https://docs.autentique.com.br/api/integration-basics/oauth2/obtaining-and-using-tokens.md): Exchange the authorization code for tokens, call the GraphQL API, and refresh access.
- [OAuth errors and security](https://docs.autentique.com.br/api/integration-basics/oauth2/oauth-errors-and-security.md): Troubleshoot OAuth failures and protect credentials, authorization codes, and tokens.