Add official CoinGecko MCP to README.md

[sachiew]

Description

Add official CoinGecko MCP to README.md

Server Details

• Server: https://github.com/coingecko/coingecko-typescript/tree/main/packages/mcp-server
• Docs: https://docs.coingecko.com/reference/mcp-server

Motivation and Context

This allows users to access real-time and historical cryptocurrency price & market data across 200+ blockchain networks, powered by CoinGecko, the world's largest independent crypto data aggregator. It comes with both Remote Public Server (without authentication) and also Local Server (authenticated with API key) options.

How Has This Been Tested?

Yes. Tested with Claude Desktop and Claude.ai

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• I have read the MCP Protocol Documentation
• My changes follows MCP security best practices
• I have updated the server's README accordingly
• I have tested this with an LLM client
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have documented all environment variables and configuration options

[olaservo]

Thanks for your contribution to the servers list. This has been merged in this combined PR: #2144

This is a new process we're trying out, so if you see any issues feel free to re-open the PR and tag me.