> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://developers.beehiiv.com/welcome/getting-started/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://developers.beehiiv.com/_mcp/server.

Harness beehiiv's API to enrich your user records with custom fields from external forms,
manage lists and segmentation programmatically, and integrate your beehiiv publication
more closely with advertising platforms.

#### [API Reference](/api-reference)

#### [Create an API Key](/welcome/create-an-api-key)

#### [Sign up for beehiiv](https://app.beehiiv.com/signup)

#### Download OpenAPI Specification

Looking for support? Inspiration? Check out our other resources:

* [Knowledge Base](https://support.beehiiv.com/hc/en-us): Product support, documentation, and assistance.
* [Tutorials](https://www.youtube.com/channel/UCI80tsW3wYNGEJLxwJo42vw): Archive of video tutorials.
* [Course](https://www.beehiiv.com/courses/newsletter-xp): How to build, scale, and monetize your newsletter.
* [Blog](https://blog.beehiiv.com/): Best practices to help scale your newsletter.
* [Submit a support ticket](https://app.beehiiv.com/?new_support_ticket)

> Build your audience with beehiiv's API and SDKs. Create new subscribers and posts, get real-time notifications of subscription activity, and more.