EODHD Guard

eodhd-guard-mcp

A guard-first MCP server for the EODHD market-data API: it catches silent failures, says what each price is, and counts what every call costs.

Status: alpha (0.2.x). Tool names, parameters and output fields can still change before 1.0.

Unofficial. This project is not affiliated with or endorsed by EODHD or Unicorn Data Services. You need your own EODHD subscription, and EODHD's data licence applies to everything you fetch. See the data licence notice.

Why

EODHD is a broad, inexpensive market-data API. An evaluation in October 2026 (about 930 calls) found its data sound for the US, London and Swiss markets, and good as a cross-check for India. It also found failures that an AI assistant cannot see, because the API reports them as success:

• Frozen codes. A delisted or renamed code keeps answering HTTP 200 with frozen data. Roche's Swiss line changed from ROG.SW to ROP.SW in March 2026, and the old code kept answering.
• Empty and placeholder answers. A real-time quote for an unknown code is HTTP 200 with every field set to "NA". Tokyo and the UAE have no prices and answer with [] or a bare 404.
• Ignored parameters. A bad from date is ignored and the whole history comes back. An unknown period falls back to daily. A symbol without an exchange suffix silently means the US.
• Prices that are not what they look like. close is not adjusted for splits or dividends, yet it is back-adjusted for some spin-offs and demergers. adjusted_close is the column to use for returns.
• Lateness. Quotes are 15 to 20 minutes delayed. Intraday bars for the current session are not available. End-of-day bars appear anywhere from 10 minutes (US) to 4.5 hours (India) after the close.
• Cost. Every endpoint has a price in API calls (end-of-day 1, intraday 5, fundamentals 10, news 5 for each ticker), so an unattended agent can spend a day's allowance in minutes.
• Scores that look like measurements. News sentiment is an automated text score. In checks, a story about steep declines scored strongly positive, and polarity was close to +1 or -1 for most of the articles.

This server has 17 tools, and every one has guards. It validates arguments before sending anything, turns empty and placeholder answers into errors or explicit warnings, says whether each price is raw or adjusted and how old it is, states the cost of every response, counts every call in a local ledger, and stops at a daily budget. Each caveat is explained in docs/caveats.md.

Requirements

• Python 3.10 or later.
• Your own EODHD subscription and API key. This project does not include or resell data.
• An MCP client that can start a stdio server or connect to a streamable-HTTP one, such as Claude Code or Claude Desktop.

EODHD plan for each tool

EODHD refuses requests that your plan does not include (HTTP 403). The server reports that as PLAN_ERROR. For intraday bars, fundamentals, the three calendars and dividend and split history, the message names the plans that include the endpoint. For the other endpoints it says that a higher plan may include it.

check_symbol also needs the plan that covers get_quote when you pass include_quote. The free EODHD plan allows 20 calls a day and one year of end-of-day history; if you use it, set EODHD_GUARD_DAILY_BUDGET=20. EODHD changes its plans from time to time, so check eodhd.com for the current table.

Data licence notice

EODHD's data is licensed for personal, non-commercial use, and EODHD's terms do not allow redistributing it. That was the position at the time of the October 2026 evaluation; read the current terms on eodhd.com before you use output for anything beyond your own analysis.

• This project ships no EODHD data. Its tests use synthetic fixtures.
• You are responsible for complying with EODHD's terms for everything you fetch, store and share.
• The local cache holds EODHD responses. Do not share it, sync it to a shared folder or commit it. See Cache and state files.
• Nothing here is legal advice.

Unofficial

eodhd-guard-mcp is an independent project. It is not affiliated with, endorsed by or supported by EODHD or Unicorn Data Services. "EODHD" and "EOD Historical Data" are names of their respective owners, used here only to say which API the server talks to.

Install

The package is on PyPI. Run it without installing, with uv:

uvx eodhd-guard-mcp --version

Or install it, preferably into an isolated environment:

pipx install eodhd-guard-mcp

or, inside a virtual environment

pip install eodhd-guard-mcp

It is also listed in the official MCP registry as io.github.techfreakworm/eodhd-guard-mcp.

The latest unreleased code installs from GitHub:

pip install git+https://github.com/techfreakworm/eodhd-guard-mcp

Or from a clone:

git clone https://github.com/techfreakworm/eodhd-guard-mcp.git

cd eodhd-guard-mcp pip install -e .

Check the install and your configuration:

eodhd-guard-mcp --version

EODHD_API_KEY_FILE="$HOME/.config/eodhd-guard-mcp/api_key" eodhd-guard-mcp --check

--check prints the configuration to stderr, with the key shown only as set or not set, together with the state directory and the budget. Add --online to make one free call to EODHD's account endpoint and print only its usage counters. The exit code is non-zero when something is wrong. See Command line.

Configure

The server needs your API key. Pass it as EODHD_API_KEY_FILE, the path of a file that holds only the key, or as EODHD_API_KEY. Prefer the file. An inline key lands in your shell history and in your MCP client's configuration, in plain text.

To create the key file without putting the key in your shell history:

mkdir -p ~/.config/eodhd-guard-mcp

(umask 077; touch ~/.config/eodhd-guard-mcp/api_key) ${EDITOR:-nano} ~/.config/eodhd-guard-mcp/api_key

Claude Code

claude mcp add eodhd-guard --env EODHD_API_KEY_FILE="$HOME/.config/eodhd-guard-mcp/api_key" -- eodhd-guard-mcp

With the key inline, which is easier but leaves it in your shell history and in Claude Code's configuration file:

claude mcp add eodhd-guard --env EODHD_API_KEY=... -- eodhd-guard-mcp

examples/claude_code.md has the full walk-through, including uvx, user scope and a lower budget.

Claude Desktop

Add the server to claude_desktop_config.json and restart Claude Desktop. The file is at ~/Library/Application Support/Claude/ on macOS and %APPDATA%\Claude\ on Windows.

{

"mcpServers": { "eodhd-guard": { "command": "eodhd-guard-mcp", "args": [], "env": { "EODHD_API_KEY_FILE": "/Users/you/.config/eodhd-guard-mcp/api_key" } } } }

Claude Desktop does not always see the PATH of your shell. If it cannot find the command, put the absolute path from which eodhd-guard-mcp (macOS and Linux) or where eodhd-guard-mcp (Windows) in command. On Windows, write backslashes twice inside the JSON. Or let uvx fetch and run it:

{

"mcpServers": { "eodhd-guard": { "command": "uvx", "args": ["eodhd-guard-mcp"], "env": { "EODHD_API_KEY_FILE": "/Users/you/.config/eodhd-guard-mcp/api_key" } } } }

The same file is in examples/claude_desktop_config.json.

Any other stdio client

Start eodhd-guard-mcp with no arguments and set EODHD_API_KEY_FILE in its environment. python -m eodhd_guard_mcp does the same. Logs go to stderr, because stdout carries the protocol.

Streamable HTTP

eodhd-guard-mcp --transport streamable-http --host 127.0.0.1 --port 8000

The server answers at http://127.0.0.1:8000/mcp. This transport has no authentication. Anyone who can reach the port can spend your EODHD calls, so keep the host on 127.0.0.1. The server prints a warning to stderr to remind you.

Command line

--check writes a JSON report to stderr, because stdout carries the protocol on stdio. It holds the version, api_key (set or NOT SET), the base URL, the state directory, the daily budget (a number, or unlimited), the cache setting, the stale-session threshold and the coverage switch. With --online it adds account (EODHD's counters) or account_error. The exit code is 0 when all is well, 1 when no key is set or the online call fails, and 2 when a setting is invalid.

Environment variables

An invalid value stops the server at start-up with a CONFIG_ERROR message that names the variable and the values it accepts. A key file that cannot be read, or is empty, does the same. A key that is simply not set does not stop the server: listing tools works, and each tool c