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

# Mailchimp core concepts

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

## Docs

- [How Mailchimp works](https://mailchimp.com/developer/marketing/concepts/how-mailchimp-works.md): What Mailchimp does for the businesses that use it, and what people use the Marketing API to do.
- [Audiences](https://mailchimp.com/developer/marketing/concepts/audiences.md): How audiences, contacts, tags, merge fields, and segments relate to each other in Mailchimp.
- [Contacts](https://mailchimp.com/developer/marketing/concepts/audiences/contacts.md): The contact model, subscription status across channels, and how tags organize contacts.
- [Merge fields](https://mailchimp.com/developer/marketing/concepts/audiences/merge-fields.md): Save and retrieve custom contact data to personalize campaigns.
- [Segments](https://mailchimp.com/developer/marketing/concepts/audiences/segments.md): Subsets of contacts in an audience, defined by their attributes, activity, or tags.
- [Advanced segments](https://mailchimp.com/developer/marketing/concepts/audiences/advanced-segments.md): Create, read, and update advanced segments through the Marketing API, and write the definitions that decide who belongs in them.
- [E-Commerce](https://mailchimp.com/developer/marketing/concepts/e-commerce.md): How stores, customers, products, carts, and orders relate to each other in Mailchimp.