Solana Onchain

Crates.io License: MIT Changelog

MCP server for Solana blockchain operations.

Demo

Install

Method 1: Prebuilt Binary (Recommended)

Warning: make sure you understand what the bash script doing before executing it

curl -fsSL https://raw.githubusercontent.com/widnyana/solana-onchain-mcp/refs/heads/main/install.sh | bash

This downloads the latest release for your platform and installs to ~/.local/bin.

Method 2: Install from crates.io

cargo install solana-onchain-mcp

Method 3: Build from Source

cargo install --git https://github.com/widnyana/solana-onchain-mcp

Requires Rust 1.85+.

Setup

Start the server first:

SOLANA_NETWORK=devnet solana-onchain-mcp --port 3000

Claude Code

.mcp.json:

{
  "mcpServers": {
    "solana": {
      "url": "http://localhost:3000/mcp"
    }
  }
}

Cursor

.cursor/mcp.json:

{
  "mcpServers": {
    "solana": {
      "url": "http://localhost:3000/mcp"
    }
  }
}

VS Code

.vscode/mcp.json (see MCP Server docs):

{
  "servers": {
    "solana": {
      "type": "http",
      "url": "http://localhost:3000/mcp"
    }
  }
}

With Keypair (for transfers)

Start the server with keypair support (localhost only):

SOLANA_NETWORK=devnet SOLANA_KEYPAIR_PATH=/path/to/keypair.json \
  solana-onchain-mcp --http-allow-keypair --accept-risk --host 127.0.0.1 --port 3000

Then connect your client to http://localhost:3000/mcp.

Tools (19)

Read (no keypair required)

Tool	Description
get_balance	SOL balance for address
get_account_info	Account data and metadata
get_multiple_accounts	Batch fetch up to 100 accounts
get_token_accounts_by_owner	SPL token accounts for wallet
get_program_accounts	Accounts owned by program
get_transaction	Transaction by signature
get_signatures_for_address	Transaction history for address
get_signature_status	Transaction confirmation status
get_slot	Current slot/block height
simulate_transaction	Test transaction without signing
inspect_transaction_raw	Raw transaction with program names
inspect_transaction_humanized	Human-readable transaction summary
get_server_info	Server configuration and network info

Write (requires keypair)

Tool	Description
transfer_sol	Transfer SOL
transfer_token	Transfer SPL tokens
create_associated_token_account	Create token account
approve_token	Approve token delegate
revoke_token	Revoke token delegate
close_token_account	Close unused token account

Mainnet Usage

⚠️ WARNING: Mainnet operations involve real assets. Always:

1. Test thoroughly on devnet first
2. Use a dedicated wallet with minimal funds
3. Verify all transaction parameters
4. Set SOLANA_ACCEPT_RISK=true or use --accept-risk flag

See Mainnet Usage for details.

Docs

See USAGE.md for configuration, parameters, and security.

Requirements

• Rust 1.85+ (edition 2024)
• Solana RPC access

License

MIT