consentgate-mcp

A Model Context Protocol server that lets any MCP-capable agent (Claude Desktop, Claude Code, Cursor, custom agents, …) gate its own actions behind a human's consent policy via ConsentGate.

The agent asks before it acts; you stay in control. High-stakes actions can block on an explicit Approve / Deny tap delivered to your Telegram.

Tools

Tool	Blocks?	What it does
check_action	no	Evaluates an action against your consent rules. Returns allow, deny, or ask (no rule matched). Use it before any sensitive/irreversible action.
request_approval	yes (≤120s)	Sends an Approve/Deny prompt to your Telegram and blocks until you tap or it times out. Returns allow only on an explicit human Approve; everything else (deny, timeout, not-available) is deny.

Both fail closed: anything other than an explicit allow means do not proceed.

Prerequisites

1. A ConsentGate account and an API key → https://consentgate.fyi/dashboard/keys (cg_…).
2. For request_approval (interactive approvals): the Pro plan and a linked Telegram account (Dashboard → Telegram → Connect). check_action works on any plan.

Configuration

Environment variables:

Var	Required	Default	Notes
CONSENTGATE_API_KEY	✅	—	Your cg_… key.
CONSENTGATE_BASE_URL	—	https://consentgate.fyi	Override for self-hosted instances.

Claude Desktop

Add to claude_desktop_config.json (Settings → Developer → Edit Config):

{
  "mcpServers": {
    "consentgate": {
      "command": "npx",
      "args": ["-y", "consentgate-mcp"],
      "env": { "CONSENTGATE_API_KEY": "cg_your_key_here" }
    }
  }
}

Claude Code

claude mcp add consentgate --env CONSENTGATE_API_KEY=cg_your_key_here -- npx -y consentgate-mcp

Generic MCP client

Run npx -y consentgate-mcp (stdio transport) with CONSENTGATE_API_KEY in the environment.

Run from source

Until the package is published to npm, point your client at the built file (node /abs/path/to/mcp/dist/index.js) instead of npx consentgate-mcp.

cd mcp
npm install        # also builds via the `prepare` script
npm run build      # -> dist/index.js
CONSENTGATE_API_KEY=cg_… npm run smoke   # lists tools + a live check_action

How an agent should use it

A good agent policy:

Before performing any action that sends messages, spends money, deletes data, posts publicly, or changes external state, call check_action. If the result is allow, proceed. If deny, stop. If ask (or the action is high-stakes), call request_approval and proceed only on an explicit allow.

Example (request_approval):

{
  "action": "transfer_funds",
  "category": "spending",
  "metadata": { "amount": "$500", "to": "Acme Corp" },
  "wait_seconds": 90
}
// -> blocks; you tap Approve in Telegram -> { "decision": "allow", "resolved_by": "human" }

License

MIT