Mcp Prepare Transactions
Let your coding agent assemble unsigned blockchain transactions through Crypto APIs instead of hand-rolling RPC payloads for every chain.
Overview
mcp-prepare-transactions is a Build-phase MCP server that builds unsigned multi-chain transactions via Crypto APIs for agent-driven integration work.
What is this MCP server?
- Builds unsigned transactions on multiple blockchains through Crypto APIs
- npm package @cryptoapis-io/mcp-prepare-transactions v0.3.0 with stdio MCP transport
- Requires CRYPTOAPIS_API_KEY as a secret environment variable
- Pairs naturally with local mcp-signer and mcp-simulate in the CryptoAPIs MCP stack
- Keeps private keys out of the prepare step by returning unsigned payloads only
- Server version 0.3.0
What problem does it solve?
Hand-crafting unsigned transaction payloads per chain burns time and invites RPC format mistakes when your agent should be writing product code instead.
Who is it for?
Indie builders adding multi-chain send or contract-call flows to an agent-assisted codebase who already have a Crypto APIs key.
Skip if: Teams that only need local signing with no upstream API, or pure read-only chain analytics with no transaction authoring.
What do I get? / Deliverables
Your agent returns standardized unsigned transactions from Crypto APIs so you can simulate, sign, and broadcast with confidence.
- Unsigned transaction payloads ready for simulation or signing
- Agent-callable prepare-transaction tools over MCP
- Repeatable multi-chain tx construction without custom RPC glue
Recommended MCP Servers
Journey fit
Transaction construction is core product integration work while you are building wallet, payout, or on-chain automation features. Fits the integrations shelf because it wires an external blockchain API into Claude Code or Cursor via MCP stdio.
How it compares
MCP blockchain prep integration, not a wallet UI skill or on-device key store.
Common Questions / FAQ
Who is mcp-prepare-transactions for?
It is for solo builders and small teams who use Claude Code, Cursor, or similar agents to integrate multi-chain transaction creation through Crypto APIs.
When should I use mcp-prepare-transactions?
Use it during build when you need unsigned transactions drafted for EVM or other Crypto APIs–supported networks before simulation or signing.
How do I add mcp-prepare-transactions to my agent?
Install @cryptoapis-io/mcp-prepare-transactions, set CRYPTOAPIS_API_KEY, register the stdio MCP server in your agent config, and invoke prepare tools from the chat.