Overview
What is MCP Helius?
MCP Helius is a Model Context Protocol (MCP) server that gives Claude access to Solana blockchain data via the Helius API. It enables Claude to check wallet balances, get blockchain information, and interact with tokens and NFTs on Solana.
How to use MCP Helius?
Install Node.js v16+, get a Helius API key, then add the server entry to your Claude Desktop configuration file (claude_desktop_config.json) with the npx command and HELIUS_API_KEY environment variable. Restart Claude; you can also run locally after cloning and building the repository.
Key features of MCP Helius
- Get wallet balances, account info, and transaction signatures
- Query token accounts, supply, and balances
- Fetch NFT and digital asset details
- Search assets by owner, creator, or authority
- Estimate priority fees and send Jito bundles
- Execute Jupiter token swaps
Use cases of MCP Helius
- Check the SOL balance of any Solana wallet address
- Fetch the current block height or slot on Solana
- List NFTs owned by a specific wallet address
- Retrieve transaction details by signature
- Execute a token swap using Jupiter
FAQ from MCP Helius
What are the prerequisites for MCP Helius?
You need Node.js (v16+), a Helius API key (get one at dev.helius.xyz), and the Claude Desktop application.
How do I configure MCP Helius for Claude Desktop?
Edit your Claude Desktop config file (claude_desktop_config.json) and add an entry under mcpServers with command npx, args ["-y","@mcp-dockmaster/mcp-server-helius"], and env HELIUS_API_KEY set to your key.
Can I run MCP Helius locally?
Yes. Clone the repository, run npm ci and npm run build, then start with HELIUS_API_KEY=your-key node build/index.js or directly via npx @dcspark/mcp-server-helius.
What blockchain operations can MCP Helius perform?
It exposes tools for basic blockchain queries (balance, block height, slot, transaction, account info), token operations (accounts, supply, balance), NFT/asset retrieval and search, system info (epoch, fees), and advanced functions like fee estimation, Jito bundles, and Jupiter swaps.
How do I add new tools to MCP Helius?
Define the tool in src/tools.ts, create a handler function in the appropriate handler file, then add the
