Blocknative MCP Server

Overview

The Blocknative MCP Server is a specialized AI‑friendly interface that delivers real‑time gas price forecasts for multiple blockchain networks. It solves a common pain point for developers building decentralized applications: the difficulty of obtaining accurate, up‑to‑date fee estimates without constantly querying external APIs or maintaining their own caching layer. By exposing a small set of high‑level tools—, , and —the server abstracts away the complexities of interacting with Blocknative’s Gas Price and Chains APIs, allowing AI assistants like Claude to request precise fee data in natural language.

What the Server Does

When an AI client invokes , the server contacts Blocknative’s Gas Price endpoint, retrieves a table of confidence‑based fee predictions (e.g., 99 %, 95 %), and returns a neatly formatted Markdown summary that includes the current base fee, max priority fee, and total max fee. builds on this by accepting a gas limit and confidence level, calculating the expected transaction cost in both Gwei and ETH. The tool provides a quick lookup of all blockchains the server can query, including chain IDs and network names. These tools enable developers to embed real‑time fee calculations directly into conversational agents, smart contract builders, or automated deployment pipelines.

Key Features & Capabilities

• Multi‑chain support: Default to Ethereum Mainnet but can query any chain supported by Blocknative.
• Confidence‑aware predictions: Each prediction includes multiple confidence levels, letting users balance speed versus cost.
• Asynchronous HTTP: Uses for non‑blocking requests, ensuring the MCP server remains responsive even under load.
• Optional API key: Low‑frequency use works without a key; for high‑volume scenarios, a free Blocknative API key unlocks full rate limits.
• Prompt template: The prompt offers a ready‑made query format that developers can plug into their own workflows.

Real‑World Use Cases

• DeFi protocol builders: Dynamically adjust transaction fees in real time to avoid failed or costly transactions.
• NFT marketplaces: Provide users with the most economical gas estimates before minting or purchasing.
• Automated bot operators: Integrate the MCP into trading bots to ensure they pay just enough for timely inclusion.
• Developer tooling: Embed gas price queries into IDE extensions or CLI utilities that assist with contract deployment.

Integration Into AI Workflows

Because the server follows FastMCP conventions, it can be launched directly from a local environment or installed into Claude Desktop with a single command. Once active, any AI assistant that supports MCP can call the exposed tools as if they were native language functions. The returned Markdown tables are immediately renderable in chat interfaces, making the data both human‑readable and machine‑processable. This seamless integration turns abstract fee calculations into actionable insights delivered through conversational AI.

Standout Advantages

Unlike generic blockchain explorers, the Blocknative MCP Server offers confidence‑based fee predictions and a straightforward estimation of total costs, eliminating guesswork. Its asynchronous design keeps latency low, while the optional API key provision allows developers to start without additional costs and scale later. By packaging these capabilities into a single, well‑documented MCP server, the project empowers developers to focus on higher‑level logic rather than boilerplate API handling.