mcp-stock-server (FinanceExpert)

A small Model Context Protocol server built with FastMCP. It exposes Yahoo Finance market data (via yfinance) so assistants can fetch quotes, history as CSV, and plain-text Unicode price charts.

Requirements

Python 3.11+
uv (recommended) or another way to install dependencies from pyproject.toml

Setup

cd mcp-stock-server
uv sync

Run (stdio)

The server speaks MCP over stdio (the default for mcp.run()):

uv run python server.py

Add as an MCP server (Cursor)

Open Cursor Settings → MCP (or edit your MCP JSON config — often ~/.cursor/mcp.json on macOS/Linux).
Register a stdio server whose working directory is this repo and whose command starts server.py.

Option A — `uv run` (recommended)

Replace /absolute/path/to/mcp-stock-server with the real path where you cloned the repo.

{
  "mcpServers": {
    "FinanceExpert": {
      "command": "uv",
      "args": ["run", "python", "server.py"],
      "cwd": "/absolute/path/to/mcp-stock-server"
    }
  }
}

After uv sync, this uses the locked dependencies from uv.lock.

Option B — project virtualenv Python

Use this if you prefer not to invoke uv from the MCP client:

{
  "mcpServers": {
    "FinanceExpert": {
      "command": "/absolute/path/to/mcp-stock-server/.venv/bin/python",
      "args": ["server.py"],
      "cwd": "/absolute/path/to/mcp-stock-server"
    }
  }
}

Create the venv first (from the repo root): uv sync (installs deps into .venv).

Save the config and restart Cursor (or reload MCP). In the MCP panel you should see FinanceExpert with tools get_stock_analysis, get_historical_prices, and get_stock_price_chart.

Other MCP clients (e.g. Claude Code, editors with MCP support) use the same idea: command + args + cwd for a stdio server.

Tools

Tool	Description
`get_stock_analysis`	Snapshot text: current price, 50-day average, analyst recommendation key (from `Ticker.info`).
`get_historical_prices`	Daily close column as CSV for a lookback of `days` calendar days (`period=f"{days}d"`). Default `days=30`.
`get_stock_price_chart`	Box-drawn ASCII/Unicode chart: area fill, price axis, start/end dates on the time axis, and an 8-step sparkline.

`get_stock_price_chart` parameters

ticker — Symbol, e.g. INTU, AAPL.
days — Used when period is omitted: Yahoo range Nd (calendar days). Default 30.
period — Optional Yahoo period string; when set, it overrides days. Examples: 10y, 5y, 1y, 6mo, ytd, max.

Examples:

Last month of sessions (by calendar days): days=30
Last ten calendar years (Yahoo window): period="10y"

Market data comes from Yahoo through yfinance; semantics match yfinance history(period=...).

Disclaimer

Quotes and history are informational only, not investment advice. Yahoo data can lag or contain errors; verify independently for decisions.

FinanceExpert