MCP server for address derivation and encoding utilities across multiple blockchains via Crypto APIs
About
MCP server for address derivation and encoding utilities across multiple blockchains via Crypto APIs
Security Report
Valid 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 (17/17 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:
Environment variable: CRYPTOAPIS_API_KEY
How to Install
Add this to your MCP configuration file:
{
"mcpServers": {
"io-github-cryptoapis-io-mcp-utils": {
"env": {
"CRYPTOAPIS_API_KEY": "your-cryptoapis-api-key-here"
},
"args": [
"-y",
"@cryptoapis-io/mcp-utils"
],
"command": "npx"
}
}
}Getting Started
Once installed, try these example prompts and explore these capabilities:
- 1"Validate this Bitcoin address: bc1qxy2kgdygjrsqtzq2n0yrf2493p83kkfjhx0wlh"
- 2"Decode this raw Ethereum transaction hex: 0x02f8..."
- 3"Derive 5 receiving addresses from my xPub for Bitcoin mainnet"
- 4"Convert this XRP classic address to an X-Address with tag 12345"
- 5Tool: utxo_utils: Validate UTXO addresses and decode raw transactions
- 6Tool: evm_utils: Validate EVM addresses and decode raw transactions
- 7Tool: xrp_utils: Validate XRP addresses and encode/decode X-Addresses
- 8Tool: derive_addresses: Derive HD wallet addresses from xPub/yPub/zPub
Documentation
View on GitHubFrom the project's GitHub README.
@cryptoapis-io/mcp-utils
MCP server for Crypto APIs Utils product. Validate addresses, decode raw transactions, and XRP X-Address encode/decode.
API Version: Compatible with Crypto APIs version 2024-12-12
Features
- UTXO utils: Validate address, decode raw transaction hex (bitcoin, bitcoin-cash, litecoin, dogecoin, dash, zcash)
- EVM utils: Validate address, decode raw transaction hex
- XRP utils: Validate address, decode X-Address, encode X-Address
- Derive addresses: Derive HD wallet (xPub/yPub/zPub) change or receiving addresses without syncing
Prerequisites
Installation
npm install @cryptoapis-io/mcp-utils
Or install all Crypto APIs MCP servers: npm install @cryptoapis-io/mcp
Usage
# Run with API key
npx @cryptoapis-io/mcp-utils --api-key YOUR_API_KEY
# Or use environment variable
export CRYPTOAPIS_API_KEY=YOUR_API_KEY
npx @cryptoapis-io/mcp-utils
# HTTP transport
npx @cryptoapis-io/mcp-utils --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-utils": {
"command": "npx",
"args": ["-y", "@cryptoapis-io/mcp-utils"],
"env": {
"CRYPTOAPIS_API_KEY": "your_api_key_here"
}
}
}
}
Cursor
Add to .cursor/mcp.json (project) or ~/.cursor/mcp.json (global):
{
"mcpServers": {
"cryptoapis-utils": {
"command": "npx",
"args": ["-y", "@cryptoapis-io/mcp-utils"],
"env": {
"CRYPTOAPIS_API_KEY": "your_api_key_here"
}
}
}
}
MCP Inspector
npx @modelcontextprotocol/inspector npx @cryptoapis-io/mcp-utils --api-key YOUR_API_KEY
n8n
- Start the server in HTTP mode:
npx @cryptoapis-io/mcp-utils --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
utxo_utils
| Action | Description |
|---|---|
validate-address | Check if a UTXO address is valid. Requires blockchain, network, address |
decode-raw-transaction | Decode a raw transaction hex. Requires blockchain, network, rawTransactionHex |
convert-bitcoin-cash-address | Convert Bitcoin Cash address between legacy and CashAddr formats. Requires network, address (Bitcoin Cash only, no blockchain parameter) |
Supported Blockchains: bitcoin, bitcoin-cash, litecoin, dogecoin, dash, zcash
evm_utils
| Action | Description |
|---|---|
validate-address | Check if an EVM address is valid. Requires blockchain, network, address |
decode-raw-transaction | Decode a raw transaction hex. Requires blockchain, network, rawTransactionHex |
xrp_utils
| Action | Description |
|---|---|
validate-address | Check if an XRP address is valid. Requires network, address |
decode-x-address | Decode X-Address to classic address and tag. Requires network, xAddress |
encode-x-address | Encode classic address and tag to X-Address. Requires network, classicAddress, addressTag |
derive_addresses
Derive HD wallet (xPub/yPub/zPub) change or receiving addresses without syncing. Derives up to 10 addresses per call.
| Parameter | Description |
|---|---|
blockchain | Target blockchain |
network | Network name |
extendedPublicKey | xPub/yPub/zPub for the HD wallet |
addressFormat | Address format (optional): p2pkh, p2sh, p2wpkh, standard, p2sh-cash, p2pkh-cash, classic, base58 |
addressesCount | Number of addresses to derive, up to 10 (optional) |
isChange | If true, derive change address(es); if false, derive receiving/deposit (optional, UTXO only) |
startIndex | Starting index for derivation (optional) |
Supported Blockchains: bitcoin, bitcoin-cash, litecoin, dogecoin, dash, zcash, ethereum, ethereum-classic, binance-smart-chain, xrp, tron
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-utils --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
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