blocknative-mcp

An MCP server that provides real-time gas price predictions across multiple blockchains, powered by Blocknative.

• Tools:
• predict_gas_price: Fetches gas price predictions for a specified chain (default: Ethereum Mainnet, chain_id=1), including base fee and a table with confidence levels, price, max priority fee, and max fee.
• estimate_gas_cost: Estimates transaction costs based on gas limit, confidence level, and chain ID, returning costs in Gwei and ETH.
• get_supported_chains: Lists supported blockchains in a table with chain ID, system, and network.
• Prompt:
• gas_price_query: A prompt template for querying gas prices at a specific confidence level and chain ID.
• Asynchronous: Uses httpx for non-blocking HTTP requests to Blocknative's Gas Price and Chains APIs.
• Optional API Key: Supports low-frequency access without a Blocknative API key; high-frequency use requires setting BLOCKNATIVE_API_KEY.

• Python: Version 3.10
• uv: For dependency management and running the project (installation guide)
• Blocknative API Key (optional): Required for high-frequency API access. Sign up at Blocknative to obtain a free API key.

1. Clone the Repository:

   git clone https://github.com/kukapay/blocknative-mcp.git
   cd blocknative-mcp

1. Set Up the Project with `uv`:

   uv sync

1. Set the Blocknative API Key (Optional):

• For high-frequency access, set the environment variable:

     export BLOCKNATIVE_API_KEY="your-api-key-here"

• For low-frequency access, skip this step.

The serv