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Cryptoapis Mcp Blockchain Fees MCP Server

FinanceLow Risk10.0Local
Free

MCP server for fee recommendations and gas estimation on EVM, UTXO, XRP, Tezos, Solana

About

MCP server for fee recommendations and gas estimation on EVM, UTXO, XRP, Tezos, Solana

Security Report

10.0
Low Risk10.0Low Risk

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:

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-fees": {
      "env": {
        "CRYPTOAPIS_API_KEY": "your-cryptoapis-api-key-here"
      },
      "args": [
        "-y",
        "@cryptoapis-io/mcp-blockchain-fees"
      ],
      "command": "npx"
    }
  }
}

Getting Started

Once installed, try these example prompts and explore these capabilities:

  • 1"What is the recommended fee for a Bitcoin transaction right now?"
  • 2"Estimate the gas needed for this Ethereum contract call"
  • 3"Get EIP-1559 base fee and priority fee for Polygon"
  • 4"What is the current recommended XRP fee?"
  • 5Tool: blockchain_fees_utxo — Bitcoin/UTXO fee recommendations and smart fee estimation
  • 6Tool: blockchain_fees_evm — EVM fee recommendations, EIP-1559 fees, gas estimation
  • 7Tool: blockchain_fees_xrp — XRP fee recommendations

Documentation

View on GitHub

From the project's GitHub README.

@cryptoapis-io/mcp-blockchain-fees

MCP server for Crypto APIs Blockchain Fees product. Fee recommendations and gas estimates for UTXO, EVM, and XRP blockchains.

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

Features

  • UTXO fee recommendations and smart fee estimation (Bitcoin, Bitcoin Cash, Litecoin, Dogecoin, Dash, Zcash)
  • EVM fee recommendations, EIP-1559 fees, and gas estimation for transfers and contract calls
  • XRP fee recommendations

Prerequisites

Installation

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

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

Usage

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

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

# HTTP transport
npx @cryptoapis-io/mcp-blockchain-fees --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-fees": {
      "command": "npx",
      "args": ["-y", "@cryptoapis-io/mcp-blockchain-fees"],
      "env": {
        "CRYPTOAPIS_API_KEY": "your_api_key_here"
      }
    }
  }
}

Cursor

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

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

MCP Inspector

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

n8n

  1. Start the server in HTTP mode:
    npx @cryptoapis-io/mcp-blockchain-fees --transport http --port 3000 --api-key YOUR_API_KEY
    
  2. In your n8n workflow, add an AI Agent node
  3. 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

blockchain_fees_utxo

Fee recommendations for UTXO blockchains (Bitcoin, Bitcoin Cash, Litecoin, Dogecoin, Dash, Zcash).

ActionDescription
get-fee-recommendationsGet fee recommendations (slow, standard, fast)
estimate-transaction-smart-feeEstimate smart fee for a target confirmation time

blockchain_fees_evm

Fee recommendations and gas estimation for EVM blockchains.

ActionDescription
get-fee-recommendationsGet fee recommendations (slow, standard, fast)
get-eip-1559-fee-recommendationsGet EIP-1559 fee recommendations (base fee, priority fee)
estimate-native-coin-transfer-gasEstimate gas for native coin transfer
estimate-token-transfer-gasEstimate gas for token transfer
estimate-contract-interaction-gasEstimate gas for contract interaction

blockchain_fees_xrp

Fee recommendations for XRP (mainnet, testnet).

ActionDescription
get-fee-recommendationsGet XRP fee recommendations

CLI Arguments

ArgumentDescriptionDefault
--api-keyCrypto APIs API keyCRYPTOAPIS_API_KEY env var
--transportTransport type: stdio or httpstdio
--hostHTTP host0.0.0.0
--portHTTP port3000
--pathHTTP path/mcp
--statelessEnable stateless HTTP modefalse

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-key request headers are ignored.
  • Without --api-key: Each request must include an x-api-key header 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-fees --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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Version History

v0.2.4Mar 5, 2026Re-scanned

Dependency updates and stability improvements.