> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://mailchimp.com/developer/marketing/build/start-developing/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://mailchimp.com/_mcp/server.

# Start developing

> Find all the Mailchimp API documentation and tools developers need to send marketing and transactional emails.

## Docs

- [Client libraries and SDKs](https://mailchimp.com/developer/marketing/build/start-developing/client-libraries-and-sdks.md): Official client libraries for the Mailchimp Marketing API, plus the Mobile SDK for iOS and Android.
- [Send your first API request](https://mailchimp.com/developer/marketing/build/start-developing/send-your-first-api-request.md): Make your first call to the Marketing API and verify your credentials with the Ping endpoint.
- [CLI](https://mailchimp.com/developer/marketing/build/start-developing/cli.md): Install and use the Mailchimp CLI to call the Marketing API from your terminal.
- [Set up an OAuth app](https://mailchimp.com/developer/marketing/build/start-developing/set-up-an-oauth-app.md): Register an application, implement the OAuth 2 flow on your server, and rotate a client secret.