Mini CRM MCP

A complete, end-to-end Model Context Protocol server over crm/leads.db (40 sales leads). An MCP client or LLM can ask "give me the funnel by stage", "what's in Priya's pipeline", or "what's our weighted forecast" and get structured answers without ever writing SQL.

This is a practical server (like the sibling Mcp_venki is a teaching one). It replaced an earlier StudentAnalytics prototype — same architecture, pointed at real CRM data.

Pipeline stages: New → Contacted → Qualified → Proposal → Won / Lost.

What it exposes

Tools (model-callable)

Resources (loadable read-only data)

• crm://schema — the table schema + stage order

• crm://lead/{lead_id} — a single lead as a readable card (URI template)

Prompt

• pipeline_review(owner?) — template that asks the model to write a pipeline review

The weighted forecast

Each stage has a close probability (New 10%, Contacted 25%, Qualified 50%, Proposal 70%, Won 100%, Lost 0%). forecast() and owner_leaderboard() multiply each lead's value by its stage probability and sum — a standard sales-forecasting method. On the current data this yields ≈ $396,755 weighted against a $942,310 raw pipeline.

Related MCP server: Sales Tools MCP Server

Safety

The SQLite connection is opened with mode=ro, so the server physically cannot write to the DB — the engine rejects any mutation. Every query is a parameterized SELECT; tool arguments are bound, never string-formatted, so they can't inject SQL. A test asserts the read-only guarantee.

Run it

Use any Python (3.10+) that has the mcp SDK installed:

pip install -r requirements.txt

# 1. Drive it end-to-end with a hand-written client (no Claude, no config):
python client_demo.py

# 2. Run the protocol tests (launch the real server over stdio):
python -m pytest test_server.py -q

A demo database ships in data/leads.db, so the server runs out of the box. CRM_DB (env var) overrides the database path to point at your own leads table.

Registered in Claude

Added to the project .mcp.json as MiniCRM, pointing at the hermes-venv Python and the repo's crm/leads.db. Restart the app / reconnect MCP servers to pick it up, then the tools appear as mcp__MiniCRM__* and the prompt as /mcp__MiniCRM__pipeline_review.

Files

• server.py — the MCP server (7 tools, 2 resources, 1 prompt)

• client_demo.py — hand-written stdio client that exercises every primitive

• test_server.py — 8 protocol-level tests (all passing)

• data/leads.db — bundled demo database (40 synthetic leads)

• requirements.txt / pytest.ini

• docs/ — the illustrated deep-dive PDF and its HTML source

Gotchas (carried over from building the sibling servers)

1. FastMCP returns a list as one content-block per item, and puts the whole value in result.structuredContent (list/scalar wrapped as {"result": ...}, dict returns as-is). Read structuredContent, not content[0].text, or you only see the first element.

2. session.read_resource(uri) returns a result with .contents, not a 2-tuple.

3. Don't hold the MCP session in a pytest_asyncio async-generator fixture — anyio's cancel scope is finalized in a different task and every test errors in teardown. Use async with inside the test body (see test_server.py).