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

# Users

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

## Docs

- [Registered Users](https://docs.merge.dev/merge-agent-handler/build/users/registered-users.md): How Registered Users work in Agent Handler: isolation model, lifecycle, multi-tenancy with origin_user_id and origin_company_id, common errors.
- [Companies and Groups](https://docs.merge.dev/merge-agent-handler/build/users/companies-and-groups.md): How to model B2B tenants with Companies and slice users dynamically with Groups in Agent Handler.