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Mcp Broadcast

cryptoapis-io/cryptoapis-mcp-broadcast

This server connects Claude to Crypto APIs' blockchain broadcasting infrastructure, letting you submit locally signed transactions to production and test networks. It exposes a single broadcast_signed_transaction tool that works across both EVM chains (Ethereum, BSC, Polygon, Arbitron, Base, Optimism, Tron) and UTXO chains (Bitcoin, Litecoin, Dogecoin, Dash, Zcash). You'd reach for this when you need Claude to push signed transaction hex strings to the blockchain after handling signing separately, either through their companion mcp-signer server or your own signing setup. Requires a Crypto APIs account and API key. Supports both stdio and HTTP transports, with HTTP mode offering per-request API keys for multi-tenant deployments.

tool
1
auth
Secret needed
transport
STDIO
env var
1
last updated
Sep 24, 2026
View on GitHub

Tools

1 tools

Public tool metadata for what this MCP can expose to an agent.

broadcast_signed_transactionSubmit a signed transaction to the blockchain.

Submit a signed transaction to the blockchain.

No parameter schema in public metadata yet.

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Configuration

CRYPTOAPIS_API_KEY*secret

Crypto APIs API key

Readme

@cryptoapis-io/mcp-broadcast

MCP server for Crypto APIs Broadcast product. Submit locally signed transactions to the blockchain.

API Version: Compatible with Crypto APIs version 2024-12-12

Features

  • Broadcast signed transaction hex to any supported blockchain
  • Supports EVM (Ethereum, Ethereum Classic, BSC, Polygon, Avalanche (C-Chain), Arbitrum, Base, Optimism, Tron)
  • Supports UTXO (Bitcoin, Bitcoin Cash, Litecoin, Dogecoin, Dash, Zcash)
  • Works with transactions signed by @cryptoapis-io/mcp-signer or any external signer

Prerequisites

Installation

npm install @cryptoapis-io/mcp-broadcast

Or install all Crypto APIs MCP servers: npm install @cryptoapis-io/mcp

Usage

# Run with API key
npx @cryptoapis-io/mcp-broadcast --api-key YOUR_API_KEY

# Or use environment variable
export CRYPTOAPIS_API_KEY=YOUR_API_KEY
npx @cryptoapis-io/mcp-broadcast

View the full README on GitHub

Details

Repository
github.com/cryptoapis-io/cryptoapis-mcp-broadcast
Category
Finance & Commerce
Package
@cryptoapis-io/mcp-broadcast
Transport
STDIO
Auth
Required
Registry
MCP registry, active

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