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Cryo

Provides a powerful Ethereum blockchain data extraction and analysis interface using Cryo and DuckDB...

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Updated Sep 9, 2025
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Provides a powerful Ethereum blockchain data extraction and analysis interface using Cryo and DuckDB, enabling efficient SQL-based querying of on-chain datasets with advanced filtering capabilities.
  1. Obtain an Ethereum RPC Endpoint URL

    • Sign up for an Ethereum RPC service provider like Infura (https://infura.io/), Alchemy (https://www.alchemy.com/), or another provider of your choice.
    • Create a new project in your provider's dashboard.
    • Copy the HTTPS endpoint URL for the Ethereum mainnet (or your target network).
  2. Prepare Your Environment Variable

    • The required environment variable is ETH_RPC_URL.
    • Paste your obtained RPC endpoint URL as the value for ETH_RPC_URL.
    • (Optionally) If you want to specify a data directory for Cryo MCP to store downloaded blockchain data, set the CRYO_DATA_DIR environment variable to your desired filesystem path.
  3. Add Environment Variables to FastMCP

    • Click the “Install Now” button to start the connection setup with FastMCP.
    • In the FastMCP connection interface, add the following environment variables:
      • ETH_RPC_URL — Paste your Ethereum RPC endpoint URL here
      • (Optional) CRYO_DATA_DIR — Enter a directory path to store blockchain data (if desired; otherwise, it will use the default).
  4. Save and Finish

    • Click Save/OK/Confirm in the FastMCP interface to finalize your connection. Your Cryo MCP integration is now ready to use with blockchain data access.

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