> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.merge.dev/merge-unified/crm/custom-objects/association-types/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.merge.dev/_mcp/server.

# Association Types

> Build once. Connect to every API, tool, and LLM. Ship products and agents to production without owning the integration stack.


## API Docs

- Association Types [/custom-object-classes/{custom_object_class_id}/association-types](https://docs.merge.dev/merge-unified/crm/custom-objects/association-types/custom-object-classes-association-types-list.md)
- Association Types [/custom-object-classes/{custom_object_class_id}/association-types/{id}](https://docs.merge.dev/merge-unified/crm/custom-objects/association-types/custom-object-classes-association-types-retrieve.md)
- Association Types [/custom-object-classes/{custom_object_class_id}/association-types/meta/post](https://docs.merge.dev/merge-unified/crm/custom-objects/association-types/custom-object-classes-association-types-meta-post-retrieve.md)

## OpenAPI Specification

The raw OpenAPI 3.1 specification for this API is available at:
- [OpenAPI JSON](https://docs.merge.dev/merge-unified/crm/custom-objects/association-types/openapi.json)
- [OpenAPI YAML](https://docs.merge.dev/merge-unified/crm/custom-objects/association-types/openapi.yaml)