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

# Open details

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


## API Docs

- Open details [List campaign open details](https://mailchimp.com/developer/marketing/api/reports/open-details/list-open-details.md)
- Open details [Get opened campaign subscriber](https://mailchimp.com/developer/marketing/api/reports/open-details/get-open-detail.md)

## OpenAPI Specification

The raw OpenAPI 3.1 specification for this API is available at:
- [OpenAPI JSON](https://mailchimp.com/developer/openapi.json)
- [OpenAPI YAML](https://mailchimp.com/developer/openapi.yaml)