Connects to Crypto APIs to build unsigned EVM transactions across multiple blockchains. You get three core operations: preparing native coin transfers from an address, ERC-20 token transfers, and ERC-721 NFT transfers. The server returns unsigned transaction hex that pairs with their mcp-signer tool for the signing step. Requires a Crypto APIs account and API key. Works in stdio mode for Claude Desktop and Cursor, or HTTP mode for n8n and custom integrations. The HTTP version supports both single-key mode for personal use and multi-tenant mode where each request supplies its own key via header. Useful when you need to construct blockchain transactions programmatically without handling the low-level transaction building yourself.
claude mcp add --transport stdio io.github.cryptoapis-io-mcp-prepare-transactions uvx mcp-prepare-transactions