Apple Stocks MCP Server

🍎 apple-stocks-mcp

A macOS-only Model Context Protocol (MCP) server that lets an AI assistant read your own data from the Stocks app that ships with macOS — your watchlist, and the quotes, fundamentals and intraday charts the app has already cached on your Mac.

100% local and read-only. It reads files that already exist on your own machine, in the Stocks app's container under your home folder. It makes no network requests, uses no external API, needs no API keys, and sends nothing anywhere. The data is whatever the Stocks app last synced — open the app to refresh it.

⚠️ macOS only. The data lives inside the macOS Stocks app's container, so this server does not work on Linux or Windows. On a non-macOS host the server still starts, but exposes a single platform_info tool that politely explains it's macOS-only and how to remove it — no failing tools, no crashes.

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Quick start (30 seconds)

On a Mac, open the Stocks app once (so its data exists), then:

Claude Desktop / any MCP client — add this and restart:

{ "mcpServers": { "apple-stocks": { "command": "npx", "args": ["-y", "apple-stocks-mcp"] } } }

Claude Code:

claude mcp add apple-stocks -- npx -y apple-stocks-mcp

Then ask: "What's the Apple stock doing today?" The first time, your client asks permission to use the tool — choose Yes (or "Yes, and don't ask again"). That's it. If anything's off, ask it to run stocks_doctor — it tells you exactly what to fix.

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Contents

• What you can ask
• Privacy
• Where the data comes from
• Tools · Resources · Prompts
• Example output
• Requirements
• Setup
• FAQ & troubleshooting
• Development & testing
• Legal

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What you can ask

Once connected (see Setup), ask your assistant things like:

• "What's in my stock watchlist?"
• "What's the Apple stock doing today?"
• "Show me the fundamentals for NVDA."
• "Which of my stocks are up the most today?"
• "Summarize my whole watchlist."

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Privacy

This is the most important section, so it's first.

• Read-only. The server never modifies, deletes, or writes to the Stocks app's data. It opens the SQLite caches with sqlite3's -readonly flag and only parses the watchlist file. The single write-style action, add_stock, does not touch any file — it just asks macOS to open a symbol in the Stocks app so you can add it with a tap.
• Local only. Every byte read stays on your machine and is only returned to the MCP client you connected (e.g. your local AI assistant). There are no outbound network connections in this server's code — you can verify this: there is no fetch/http/https client call anywhere in src/.
• Your own data. It reads only files owned by your user account, in your home folder (~/Library/Group Containers/group.com.apple.stocks/). It does not access other users' data, remote accounts, or anything outside that container.
• No telemetry, no analytics, no tracking. None. Ever. The only thing ever written outside the tool results is a one-line startup message to stderr (which platform it started on) — that goes to your MCP client's local logs and is never sent anywhere.
• You stay in control of access. On recent macOS versions the app reading this data (your terminal or MCP client) must be granted Full Disk Access by you, in System Settings. Revoke it any time and the server can no longer read.

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Where the data comes from

All paths are inside your own user container ~/Library/Group Containers/group.com.apple.stocks/:

This is the same "read the app's own local store" approach used by other macOS MCP servers such as apple-notes-mcp. It is reading your data from your Mac — analogous to exporting your own information — and it does not bypass any DRM, access any account, or contact any Apple service.

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Tools

Resources

Prompts

Why add_stock opens the app instead of writing the database

The watchlist lives in an encrypted, iCloud-synced store. Editing it by hand risks corrupting your watchlist and breaking sync, so add_stock deliberately does not write anything — it uses the stocks:// URL scheme to open the symbol in the Stocks app, where you add it with one tap and the app keeps its own data consistent.

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Example output

These are the actual text results the tools return (symbols shown are generic examples). Numbers come straight from your Stocks app's local cache.

apple_stock / stock_details AAPL — fundamentals at a glance:

AAPL (Apple Inc.): 299.18 USD  +3.23 (+1.09%) [open]
  Open: 298.44   Day range: 298.07 – 299.75
  52-week range: 196.86 – 317.4
  Market cap: 4.39T   Volume: 11.12M (avg 47.14M)
  P/E: 36.27   EPS: 8.26   Beta: 1.09   Div yield: 0.36%
  Next earnings: 2026-07-30
AAPL is in the watchlist.

stock_chart NVDA — intraday OHLCV as an ASCII sparkline:

NVDA intraday (7 points)
  ▁▁▂▃▆▇█
  prev close: 204.65   last: 208.69   day range: 207.36 – 208.69
  change vs prev close: +4.04 (+1.97%)

portfolio_summary — whole-watchlist analysis:

Watchlist summary — 98/99 quoted (1 without a cached quote)
  Up: 57   Down: 41   Flat: 0

  Top gainers:
    NVDA: +1.97%
    AMD:  +4.13%
    MSFT: +0.31%
  Top losers:
    INTC: -2.10%
    ...

  By currency:
    USD: 82
    EUR: 16
  By exchange:
    NASDAQ: 38
    NYSE: 35
    XETRA: 9
    ...

get_quote ["AAPL","MSFT","BTC-USD","EGL.LS"] — one line per symbol, across US / crypto / European tickers:

AAPL (Apple Inc.): 299.18 USD  +3.23 (+1.09%) [open]
MSFT (Microsoft Corporation): 378.83 USD  -0.08 (-0.02%) [open]
BTC-USD (Bitcoin USD): 64291.09 USD  -928.50 (-1.42%) [open]
EGL.LS (Mota-Engil, SGPS, S.A.): 4.67 EUR  -0.04 (-0.81%) [open]

What each tool returns

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Requirements

• macOS, with the Stocks app opened at least once (so its data exists).
• Node.js ≥ 18.
• The system sqlite3 at /usr/bin/sqlite3 (ships with macOS).
• On recent macOS versions, the MCP client (or your terminal) may need Full Disk Access to read the Stocks container. If tools return a "not found / unreadable" error, run the stocks_doctor tool, then grant Full Disk Access in System Settings → Privacy & Security → Full Disk Access.

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Setup

Option A — npx (no install)

Add this to your MCP client config (e.g. Claude Desktop: ~/Library/Application Support/Claude/claude_desktop_config.json):

{
  "mcpServers": {
    "apple-stocks": {
      "command": "npx",
      "args": ["-y", "apple-stocks-mcp"]
    }
  }
}

Option B — from source

git clone https://github.com/helderpgoncalves/apple-stocks-mcp.git
cd apple-stocks-mcp
npm install            # also builds via the `prepare` hook

{
  "mcpServers": {
    "apple-stocks": {
      "command": "node",
      "args": ["/absolute/path/to/apple-stocks-mcp/dist/index.js"]
    }
  }
}

Claude Code

Add it as an MCP server:

claude mcp add apple-stocks -- npx -y apple-stocks-mcp

…or install it as a plugin (this repo is also a Claude Code plugin marketplace), which wires up the MCP server for you:

/plugin marketplace add helderpgoncalves/apple-stocks-mcp
/plugin install apple-stocks-mcp@apple-stocks

Restart the client after editing the config.

OpenAI Codex

This repo is also an OpenAI Codex plugin. Add the marketplace and install:

codex plugin marketplace add helderpgoncalves/apple-stocks-mcp
codex plugin install apple-stocks-mcp

Or add it as a plain MCP server in your Codex config (command: npx, args: ["-y", "apple-stocks-mcp"]).

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Quick local test

The server speaks JSON-RPC over stdio:

printf '%s\n' \
'{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2024-11-05","capabilities":{},"clientInfo":{"name":"t","version":"1"}}}' \
'{"jsonrpc":"2.0","method":"notifications/initialized"}' \
'{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{"name":"apple_stock","arguments":{}}}' \
| npx -y apple-stocks-mcp

Example output: AAPL (Apple Inc.): 299.18 USD +3.23 (+1.09%) [open]

If anything looks off, run the built-in diagnostics tool — ask your assistant to run stocks_doctor, or:

printf '%s\n' \
'{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2024-11-05","capabilities":{},"clientInfo":{"name":"t","version":"1"}}}' \
'{"jsonrpc":"2.0","method":"notifications/initialized"}' \
'{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{"name":"stocks_doctor","arguments":{}}}' \
| npx -y apple-stocks-mcp

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FAQ & troubleshooting

The tools' error messages are self-explanatory and tell you exactly what to do, so you rarely need this section. When in doubt, ask your assistant to run stocks_doctor — it checks everything and prints the fix.

Yes — that's Claude's standard safety prompt the first time any MCP tool runs. Choose Yes (or "Yes, and don't ask again" to skip it next time). It's not an error and nothing is sent anywhere.

The message tells you which case it is. The two causes:

1. The Stocks app has never run. Open the macOS Stocks app once so it creates its data, then try again.
2. Full Disk Access. On recent macOS, the app running this server (your terminal, or your MCP client) must be granted Full Disk Access:
   1. System Settings → Privacy & Security → Full Disk Access
   2. Turn it on for your terminal / MCP client (add it with + if missing)
   3. Fully quit and reopen that app, then try again

Run stocks_doctor to re-check.

The very first run downloads the package via npx, which can take a moment. Just try again, or raise the startup timeout: start your client with MCP_TIMEOUT=60000 (milliseconds).

This server reads the Stocks app's local cache — the last data the app synced. It intentionally makes no network calls. To refresh, open the Stocks app (or its widget); the cache updates and the next tool call reflects it.

The app hadn't cached a quote for that exact symbol when you asked (some tickers, e.g. certain regional listings, aren't always cached). Open the Stocks app and view the symbol once, then retry. The watchlist still lists it; only its quote was missing.

add_stock opens the symbol in the Stocks app so you add it with one tap. It deliberately does not write to the app's encrypted, iCloud-synced store — that would risk corrupting your watchlist and sync. This is a safety decision.

No. The data lives in the macOS Stocks app's container, so the server is macOS-only. (The pure parsing logic is unit-tested on Linux CI using synthetic fixtures, but the real data only exists on macOS.)

No. There are zero network calls in the source — only local sqlite3 (read-only) and open. Everything read is returned solely to the MCP client you connected. See Privacy.

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Development & testing

npm run build      # compile to dist/
npm run typecheck  # type-check only
npm test           # build + run the test suite

Tests run against synthetic fixtures in test/fixtures/ (a generated dbstore.json and two small SQLite databases) — they never touch your real Stocks data. STOCKS_TEST_MODE=1 bypasses the macOS gate so the pure parsing/formatting logic can be tested on any OS, which is what CI does (GitHub Actions, Linux, Node 18/20/22).

Data paths can be overridden via env vars (used by the tests): STOCKS_DBSTORE_PATH, STOCKS_SHARED_DB_PATH, STOCKS_SPARKLINE_DB_PATH, STOCKS_SQLITE_BIN.

Project layout

src/
  index.ts           # MCP server: tools, resources, prompts
  appleStocks.ts     # reads your Stocks app data (read-only): watchlist + quotes/details/chart
  bplist-parser.d.ts
test/
  appleStocks.test.ts
  fixtures/          # synthetic data — no personal holdings
docs/
  demo.tape          # VHS script that generates demo.gif
  run-tool.sh        # helper used by the demo
server.json          # MCP Registry metadata
.github/workflows/ci.yml

To regenerate the demo GIF (requires VHS):

vhs docs/demo.tape   # writes docs/demo.gif

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Legal

Not affiliated with Apple

This is an independent, community project. It is not affiliated with, endorsed by, sponsored by, or supported by Apple Inc. "Apple", "Apple Stocks", "Stocks", "macOS", and related marks are trademarks of Apple Inc. They are used here only nominatively — to describe, factually and accurately, which app's local data this software reads. No claim of ownership or endorsement is made or implied.

This project ships no Apple code, assets, or trademarks, and does not bundle or redistribute any Apple data.

How it accesses data

The server reads files that already exist on your own Mac, under your own user account, in read-only mode. It does not circumvent any technical protection measure or DRM, does not access any online account or third-party data, and does not transmit data off your machine. The cache file formats may change between macOS versions; if that happens, a tool may simply return "no data" rather than misbehave.

Not financial advice

All figures are read from your Stocks app's local cache, may be delayed or inaccurate, and are provided as-is. Nothing here is investment, financial, legal, or tax advice. Do your own research; do not rely on this software for trading decisions. Market data ultimately originates from third-party providers via the Stocks app and is subject to their terms.

Warranty

This software is provided "AS IS", without warranty of any kind, to the fullest extent permitted by law. See the MIT License. Use at your own risk.

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License

MIT © Hélder Gonçalves