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

# Custom Fields

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


## API Docs

- Custom Fields [Create custom field <Badge intent="info" minimal outlined>OAuth Scope: custom_fields:write</Badge>](https://developers.beehiiv.com/api-reference/custom-fields/create.md)
- Custom Fields [Get custom field <Badge intent="info" minimal outlined>OAuth Scope: custom_fields:read</Badge>](https://developers.beehiiv.com/api-reference/custom-fields/show.md)
- Custom Fields [List custom fields <Badge intent="info" minimal outlined>OAuth Scope: custom_fields:read</Badge>](https://developers.beehiiv.com/api-reference/custom-fields/index.md)
- Custom Fields [Update custom field <Badge intent="info" minimal outlined>OAuth Scope: custom_fields:write</Badge>](https://developers.beehiiv.com/api-reference/custom-fields/put.md)
- Custom Fields [Delete custom field <Badge intent="info" minimal outlined>OAuth Scope: custom_fields:write</Badge>](https://developers.beehiiv.com/api-reference/custom-fields/delete.md)

## OpenAPI Specification

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