Market Data

market-data-mcp is an MCP server that combines broad crypto market data from CoinGecko, the Crypto Fear & Greed Index, and optional CryptoPanic news into one tool surface for agents.

What It Covers

• Global market overview
• Fear & Greed index with history
• Top coins by market cap
• Detailed coin lookups by CoinGecko ID
• Search for CoinGecko IDs
• Trending assets
• Optional news feed from CryptoPanic

Why This Server Exists

Most agent tasks need a quick high-level market snapshot before deeper exchange or derivatives analysis. This server provides that common layer with:

• public market data sources
• simple MCP tool contracts
• bounded input handling
• optional news support without requiring it for the rest of the server

Requirements

• Python 3.11+
• No API key is required for the core tools
• Optional keys improve rate limits or enable news

Quick Start

1. Create your local env file:

cp secrets/market_data.env.example secrets/market_data.env

2. Optionally set:

• COINGECKO_API_KEY
• CRYPTOPANIC_API_KEY

3. Run locally:

pip install -e .
python -m market_data_mcp

Docker

docker build -t market-data-mcp .
docker run --rm -p 38089:38089 --env-file secrets/market_data.env market-data-mcp

Claude / Codex MCP Registration

claude mcp add market-data --transport http http://127.0.0.1:38089/mcp

Tools

Tool	Source	Notes
get_global_market	CoinGecko	Global market cap, dominance, volume
get_fear_greed	alternative.me	Current value plus history
get_top_coins	CoinGecko	Ranked by market cap
get_coin_info	CoinGecko	Detailed market data for one asset
search_coin	CoinGecko	Resolve CoinGecko IDs
get_trending	CoinGecko	Current trending assets
get_news	CryptoPanic	Requires CRYPTOPANIC_API_KEY

Configuration

Variable	Default	Description
COINGECKO_API_KEY	empty	Optional demo key for better CoinGecko limits
CRYPTOPANIC_API_KEY	empty	Enables get_news
COINGECKO_BASE_URL	https://api.coingecko.com/api/v3	CoinGecko base URL
FEAR_GREED_BASE_URL	https://api.alternative.me	Fear & Greed API base URL
MCP_TRANSPORT	http	http, streamable-http, sse, or stdio
MCP_HOST	0.0.0.0	Bind host
PORT	38089	HTTP listen port
MCP_PATH	/mcp	MCP endpoint path
MCP_ALLOWED_HOSTS	empty	Extra allowed hosts, comma-separated
MCP_ALLOWED_ORIGINS	empty	Extra allowed origins, comma-separated

Rate Limits

• CoinGecko free tier is limited; a demo key helps substantially
• Fear & Greed generally works without authentication
• CryptoPanic free tier is limited and news is optional in this server

Development

Install test dependencies and run tests:

pip install -e ".[test]"
pytest

Security Notes

• Do not commit secrets/market_data.env
• If you expose HTTP externally, put it behind your own auth or trusted network boundary