Back to Browse
Free
MCP server for subscribing to and managing on-chain event webhooks via Crypto APIs
About
MCP server for subscribing to and managing on-chain event webhooks via Crypto APIs
Security Report
10.0
Low Risk10.0Low RiskValid MCP server (2 strong, 3 medium validity signals). No known CVEs in dependencies. Package registry verified. Imported from the Official MCP Registry. Trust signals: trusted author (14/14 approved).
12 files analyzed · 1 issue found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
What You'll Need
Set these up before or after installing:
Crypto APIs API keyRequired
Environment variable: CRYPTOAPIS_API_KEY
How to Install
Add this to your MCP configuration file:
{
"mcpServers": {
"io-github-cryptoapis-io-mcp-blockchain-events": {
"env": {
"CRYPTOAPIS_API_KEY": "your-cryptoapis-api-key-here"
},
"args": [
"-y",
"@cryptoapis-io/mcp-blockchain-events"
],
"command": "npx"
}
}
}Getting Started
Once installed, try these example prompts and explore these capabilities:
- 1"Subscribe to new block events on Ethereum mainnet and notify my webhook URL"
- 2"Monitor address 0xABC... for any incoming coins on Polygon"
- 3"List all my active blockchain event subscriptions"
- 4"Delete the webhook subscription with ID xyz"
- 5Tool: blockchain_events_create — Create webhook subscriptions for on-chain events
- 6Tool: blockchain_events_manage — List, get, activate, and delete subscriptions
Documentation
View on GitHubFrom the project's GitHub README.
@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/claude_desktop_config.json on macOS, %APPDATA%\Claude\claude_desktop_config.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
- Start the server in HTTP mode:
npx @cryptoapis-io/mcp-blockchain-events --transport http --port 3000 --api-key YOUR_API_KEY - In your n8n workflow, add an AI Agent node
- Under Tools, add an MCP Client Tool and set the URL to
http://localhost:3000/mcp
All servers default to port 3000. Use
--portto assign different ports when running multiple servers.
Available Tools
blockchain_events_manage
Manage existing webhook subscriptions.
| Action | Description |
|---|---|
list-subscriptions | List all webhook subscriptions |
get-subscription | Get details of a specific subscription |
delete-subscription | Delete a subscription |
activate-subscription | Activate a paused subscription |
blockchain_events_create
Create new webhook subscriptions for blockchain events.
| Parameter | Description |
|---|---|
eventType | Event type to subscribe to (e.g., new block, confirmed transaction, address coins) |
callbackUrl | URL to receive webhook notifications |
blockchain | Target blockchain (optional, depends on event type) |
network | Target network (optional, depends on event type) |
address | Address to monitor (optional, depends on event type) |
CLI Arguments
| Argument | Description | Default |
|---|---|---|
--api-key | Crypto APIs API key | CRYPTOAPIS_API_KEY env var |
--transport | Transport type: stdio or http | stdio |
--host | HTTP host | 0.0.0.0 |
--port | HTTP port | 3000 |
--path | HTTP path | /mcp |
--stateless | Enable stateless HTTP mode | false |
HTTP API Key Modes
When using HTTP transport, the server supports two API key modes:
- With
--api-key: The key is used for all requests.x-api-keyrequest headers are ignored. - Without
--api-key: Each request must include anx-api-keyheader with a valid Crypto APIs key. This enables hosting a public server where each user provides their own key.
# Per-request key mode (multi-tenant)
npx @cryptoapis-io/mcp-blockchain-events --transport http --port 3000
# Clients send x-api-key header with each request
Stdio transport always requires an API key at startup.
Important: API Key Required
Warning: Making requests without a valid API key — or with an incorrect one — may result in your IP being banned from the Crypto APIs ecosystem. Always ensure a valid API key is configured before starting any server.
Remote MCP Server
Crypto APIs provides an official remote MCP server with all tools available via HTTP Streamable transport at https://ai.cryptoapis.io/mcp. Pass your API key via the x-api-key header — no installation required.
License
MIT
Reviews
No reviews yet
Be the first to review this server!
More Finance MCP Servers
Toleno
Freeby Toleno · Developer Tools
Toleno Network MCP Server — Manage your Toleno mining account with Claude AI using natural language.
114
Stars
397
Installs
10.0
Security
4.8
Local
mcp-creator-python
Freeby mcp-marketplace · Developer Tools
Create, build, and publish Python MCP servers to PyPI — conversationally.
-
Stars
54
Installs
10.0
Security
5.0
Local
MarkItDown
Freeby Microsoft · Content & Media
Convert files (PDF, Word, Excel, images, audio) to Markdown for LLM consumption
89.9K
Stars
13
Installs
8.5
Security
5.0
Local
mcp-creator-typescript
Freeby mcp-marketplace · Developer Tools
Scaffold, build, and publish TypeScript MCP servers to npm — conversationally
-
Stars
13
Installs
10.0
Security
5.0
Local
FinAgent
Freeby mcp-marketplace · Finance
Free stock data and market news for any MCP-compatible AI assistant.
-
Stars
13
Installs
10.0
Security
No ratings yet
Local
Google Workspace MCP
Freeby Taylorwilsdon · Productivity
Control Gmail, Calendar, Docs, Sheets, Drive, and more from your AI
1.6K
Stars
11
Installs
7.0
Security
No ratings yet
Local