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

# API Fundamentals

> Build amazing commerce solutions powered by the BigCommerce platform

## Docs

- [API Accounts](https://docs.bigcommerce.com/developer/docs/overview/api-fundamentals/api-accounts.md): Create API accounts, authenticate requests, and configure OAuth scopes and access tokens for BigCommerce APIs.
- [Rate Limits](https://docs.bigcommerce.com/developer/docs/overview/api-fundamentals/rate-limits.md)
- [Integration Design](https://docs.bigcommerce.com/developer/docs/overview/api-fundamentals/integration-design.md)
- [Deprecations and Sunsets](https://docs.bigcommerce.com/developer/docs/overview/api-fundamentals/deprecations-sunsets.md)