cuemcp 0.1.3

Cue MCP server/adapter

An MCP service on top of HAP (Human Agent Protocol) — compose humans and agents into a team.

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The pitch (10 seconds)

cuemcp is an MCP server that gives your agents a single “collaboration inbox” (cue/cue()), so you can run Claude Code, Cursor, Codex, Windsurf (and other MCP-capable runtimes) with one consistent collaboration flow.

Pair it with cue-console for a desktop/mobile UI to view pending collaboration requests and respond from anywhere.

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Quickstart (1 minute)

Goal

Add cuemcp as a local stdio MCP server inside your agent/runtime.

Assumptions:

• You have uv.
• Your machine can run uvx.

Notes

• The current version can occasionally disconnect (for example, the agent replies directly without calling cue() at the end).
• If you get disconnected, type cue in the affected runtime to trigger auto-reconnect.

Step 1: Add the HAP rule to your agent/runtime

Before using cuemcp, add a persistent HAP rule so your agent knows it must call cue() at the end of every response.

• Windsurf: add it to Global Rules.
• Codex: add it to agents.md.
• Claude Code: add it to Claude.md.

Human Agent Protocol (HAP) rules (required)

Human Agent Protocol (HAP)

Hard rule: the agent must call the `cue` tool at the end of every response, no exceptions.
Always use the cue MCP to provide a final summary, ask a question, or request input.

Convention: when the user types `cue`, the user is accepting the HAP rules (supports disconnect + reconnect).

- First-time connection / no agent_id: call join() to obtain an agent_id, then call cue().
- Reconnect / existing agent_id (e.g. the cue call timed out but the chat continued):
  when the user types cue again, prefer calling cue() with the existing agent_id;
  only call join() again if you cannot determine the agent_id.

When to call

- On first message in a new chat (no history): call join().
- After completing any task: call cue().
- Before ending any response: call cue().

Forbidden behavior

- Using a self-chosen name without calling join() first.
- Ending a reply without calling cue().
- Replacing cue() with "let me know if you need anything else".
- Assuming there are no follow-ups.

Notes

If you are not sure whether to call it, call it.

Not calling cue() means the user cannot continue the interaction.

Then continue with MCP configuration below.

Step 2: Configure the MCP server

Claude Code

Claude Code can install local stdio MCP servers via claude mcp add.

claude mcp add --transport stdio cuemcp -- uvx --from cuemcp cuemcp

Windsurf

Windsurf reads MCP config from ~/.codeium/mcp_config.json and uses the Claude Desktop-compatible schema.

{
  "mcpServers": {
    "cuemcp": {
      "command": "uvx",
      "args": ["--from", "cuemcp", "cuemcp"]
    }
  }
}

Cursor

Cursor uses mcp.json for configuration, and the Cursor CLI (cursor-agent) can list and manage servers. The CLI uses the same MCP configuration as the editor.

cursor-agent mcp list

Create an mcp.json in your project (Cursor discovers configs with project → global → parent directory precedence) and add a cuemcp stdio server:

{
  "mcpServers": {
    "cuemcp": {
      "command": "uvx",
      "args": ["--from", "cuemcp", "cuemcp"],
      "env": {}
    }
  }
}

VS Code

VS Code MCP configuration uses a JSON file with servers and optional inputs.

{
  "servers": {
    "cuemcp": {
      "type": "stdio",
      "command": "uvx",
      "args": ["--from", "cuemcp", "cuemcp"]
    }
  }
}

Codex

Codex can register a local stdio MCP server via the CLI:

codex mcp add cuemcp -- uvx --from cuemcp cuemcp

For deeper configuration, Codex stores MCP servers in ~/.codex/config.toml.

Gemini CLI

Gemini CLI can add a local stdio MCP server via:

gemini mcp add cuemcp uvx --from cuemcp cuemcp

Fallback: run from source (no `uvx`)

If you don’t want to rely on uvx (for example, you prefer pinned source or local hacking), you can run cuemcp from a cloned repository.

git clone https://github.com/nmhjklnm/cue-mcp.git
cd cue-mcp
uv sync
uv run cuemcp

Then configure your MCP client to run:

• command: cuemcp
• args: []

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Step 3: Connect your runtime

In the agent/runtime you want to use, type cue to trigger connect (or reconnect) and route the collaboration flow to cue-console.

How it works (the contract)

Semantics

• An MCP-capable agent issues a cue (a request that requires collaboration).
• The team responds (today via a UI; later possibly via a human assistant agent).
• cuemcp provides the MCP-facing surface so any MCP participant can plug in.

Reference implementation (SQLite mailbox)

Current implementation uses a shared SQLite mailbox to connect the MCP server with a client/UI:

MCP Server  ──writes──▶  ~/.cue/cue.db  ──reads/writes──▶  cue-console (UI)
             ◀─polls──                         ◀─responds──

• DB path: ~/.cue/cue.db
• Core tables:
  • cue_requests — server ➜ UI/client
  • cue_responses — UI/client ➜ server

This keeps the integration simple: no websockets, no extra daemon, just a shared mailbox.

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Pairing with cue-console

Rule #1: both sides must agree on the same DB location.

• Start cuemcp.

• Start cue-console.

• Confirm cue-console is reading/writing ~/.cue/cue.db.

When the UI shows pending items, you’re watching the current reference implementation route collaboration through the console.

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Dev workflow (uv)

uv sync
uv run cuemcp

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Safety

• Do not commit tokens.
  • If you store publish credentials in a project file (e.g. .secret), ensure it stays ignored.
• Do not share tokens in chat.

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Links

• PyPI: pypi.org/project/cuemcp
• Repo: github.com/nmhjklnm/cue-mcp