Blockchain Events MCP server

@cryptoapis-io/mcp-blockchain-events

MCP server for Crypto APIs Blockchain Events product. Create and manage webhook subscriptions for on-chain events.

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

Features

• Create webhook subscriptions for blockchain events (new block, confirmed transaction, address coins, token transfers, etc.)
• List, get, activate, and delete existing subscriptions
• Supports all major blockchains (EVM, UTXO, Solana, XRP)

Prerequisites

• Node.js 18+
• Crypto APIs account and API key (sign up | get API key)

Installation

npm install @cryptoapis-io/mcp-blockchain-events

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

Usage

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

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

# HTTP transport
npx @cryptoapis-io/mcp-blockchain-events --transport http --port 3000 --api-key YOUR_API_KEY

Claude Desktop

Add to your Claude Desktop config (~/Library/Application Support/Claude/claudedesktopconfig.json on macOS, %APPDATA%\Claude\claudedesktopconfig.json on Windows):

{
  "mcpServers": {
    "cryptoapis-blockchain-events": {
      "command": "npx",
      "args": ["-y", "@cryptoapis-io/mcp-blockchain-events"],
      "env": {
        "CRYPTOAPIS_API_KEY": "your_api_key_here"
      }
    }
  }
}

Cursor

Add to .cursor/mcp.json (project) or ~/.cursor/mcp.json (global):

{
  "mcpServers": {
    "cryptoapis-blockchain-events": {
      "command": "npx",
      "args": ["-y", "@cryptoapis-io/mcp-blockchain-events"],
      "env": {
        "CRYPTOAPIS_API_KEY": "your_api_key_here"
      }
    }
  }
}

MCP Inspector

npx @modelcontextprotocol/inspector npx @cryptoapis-io/mcp-blockchain-events --api-key YOUR_API_KEY

n8n

1. Start the server in HTTP mode:

npx @cryptoapis-io/mcp-blockchain-events --transport http --port 3000 --api-key YOUR_API_KEY

1. In your n8n workflow, add an AI Agent node
2. Under Tools, add an MCP Client Tool and set the URL to http://localhost:3000/mcp

All servers default to port 3000. Use --port to assign different ports when running multiple servers.

Available Tools

blockchaineventsmanage

Manage existing webhook subscriptions.

blockchaineventscreate

Create new webhook subscriptions for blockchain events.

CLI Arguments

HTTP API Key Modes

When using HTTP transport, the server supports two API key modes:

Shortened. The full README is on GitHub.