LEMA Chat as an MCP server

LEMA Chat speaks MCP (the Model Context Protocol) in both directions. You can drive your workspace from any MCP client — Claude Code, Codex, or your own framework — and, from the admin side, LEMA Chat can consume external MCP servers too (see Integrations).

This page is about the first direction: connecting your tools to LEMA Chat.

How it works

LEMA Chat exposes a single MCP endpoint at /mcp (streamable HTTP, JSON-RPC 2.0). You authenticate with a personal API key — login tokens are refused, only lcak_… keys are accepted.

The tools you're offered are generated from your own access:

• Chat-asset tools — list, move, and copy docs, files, canvases, and widgets across the chats you can see (chat_* tools, each taking a chat_id).
• Workspace tools — list_workspaces, list_chats, create_chat, create_folder, list_groups, list_members, and describe.

Crucially, tools/list is filtered to your effective permissions, and every tools/call is re-checked against the same walls the in-app agents obey. The MCP surface can't exceed what you can do in the UI, and every call is written to the audit log.

Connecting Claude Code

claude mcp add --transport http lemachat https://mcp.lemachat.com/mcp \
  --header "Authorization: Bearer lcak_..."

Then just ask in natural language, for example:

"Move these docs into the project chat's docs folder and copy the logos into the branding chat."

…which resolves to list_chats → chat_list_docs / chat_list_files → chat_move_doc / chat_copy_file, all inside your clearance.

Endpoint address

Until the mcp.lemachat.com DNS record is live, the same endpoint is reachable at https://api.lemachat.com/mcp. Ask your admin which host to use.

Safety properties

• Owner-scoped — the key acts as you; no capability escalation.
• Idempotent writes — repeated write calls inside a dedup window are refused, so a retry can't double-apply.
• Audited — every call records an mcp.call audit row identifying the key.
• No hidden cost — the MCP tools don't run inference, so they aren't credit-priced today.