MCP server

apps/mcp is a Model Context Protocol server (JSON-RPC 2.0, protocol version 2024-11-05) that gives agents read access to leads and, when explicitly enabled, scoped write access.

Mint a token

Tokens are per workspace and admin-minted:

curl -X POST $OPENGTM/api/mcp/tokens -H "$AUTH" -H 'Content-Type: application/json' \
  -d '{"name": "claude-desktop", "capabilities": ["leads:read"], "ttl_days": 90}'

The plaintext ycp_… token is returned once; only its hash is stored. List with GET /api/mcp/tokens, revoke with DELETE /api/mcp/tokens/{id}. Default TTL is MCP_TOKEN_TTL_DAYS (90; 0 never expires).

Capabilities:

Capability	Unlocks	Role required at call time
`leads:read`	all read tools	any member
`leads:write`	`create_lead`, `update_lead`	editor
`sequences:enroll`	`enroll_leads`	editor
`workbooks:write`	`create_workbook`	editor
`automations:write`	`create_automation`	admin
`outreach:send`	`send_email`	admin
`leads:delete`	`delete_lead`	admin
`workbooks:delete`	`delete_workbook`	admin

Configure a client

Claude Desktop (claude_desktop_config.json) or any stdio MCP client:

{
  "mcpServers": {
    "opengtm": {
      "command": "python",
      "args": ["-m", "apps.mcp.server"],
      "cwd": "/path/to/opengtm",
      "env": { "OPENGTM_MCP_TOKEN": "ycp_..." }
    }
  }
}

For HTTP clients, run python -m apps.mcp.server --sse 3100. It binds 127.0.0.1 only (override with OPENGTM_MCP_SSE_HOST), serves GET /sse and POST /message, and authenticates every request with Authorization: Bearer. Put it behind your own TLS proxy before exposing it.

Single-tenant self-hosted installs with MCP_REQUIRE_AUTH=0 can run keyless against the main workspace.

Tools

Read tools (leads:read):

Tool	Arguments
`find_leads`	`query`, `city`, `tier` (hot/warm/cold), `limit`
`get_lead_detail`	`lead_id`
`get_pipeline_stats`	none
`enrich_company`	`lead_id`
`verify_email`	`email`
`get_hiring_signals`	`company`, `lead_id`
`score_lead`	`lead_id`

Write tools appear in tools/list only when MCP_WRITE_ENABLED=1 and the token holds the capability: create_lead, update_lead, enroll_leads, create_workbook, create_automation, send_email, delete_lead, delete_workbook. All accept an idempotency_key.

The write gate

Six checks stand between a write tool call and a database row:

The token must hold the capability (missing tools are not even listed).
MCP_WRITE_ENABLED must be on globally.
The user’s role is re-checked live; a downgrade to viewer denies the call even with a valid token.
A per-workspace daily write cap (MCP_MAX_WRITES_PER_DAY, 0 = unlimited) and idempotency reservation.
The token’s bound workspace wins; arguments naming another workspace are ignored.
Exactly one audit row per attempt, including denials.