Phantom Wallet MCP

Use the phantom MCP server to interact with the user's Phantom wallet directly.

Available Tools

Tool	Description
get_wallet_addresses	Get blockchain addresses (Solana, Ethereum, Bitcoin, Sui) for the connected wallet
sign_transaction	Sign a transaction (base64url for Solana, RLP hex for Ethereum)
transfer_tokens	Transfer SOL or SPL tokens on Solana — builds, signs, and sends the transaction
buy_token	Fetch Solana swap quotes from Phantom API; optionally sign and send
sign_message	Sign a UTF-8 message with automatic chain-specific routing

Setup

The phantom MCP server requires a PHANTOM_APP_ID environment variable from Phantom Portal. On first use, it opens a browser for OAuth authentication via Google or Apple login.

Supported Networks

Chain	Networks
Solana	mainnet, devnet, testnet
Ethereum	Mainnet, Sepolia, Polygon, Base, Arbitrum
Bitcoin	Mainnet
Sui	Mainnet, Testnet

Networks use CAIP-2 format (e.g., solana:mainnet, eip155:1).

Examples

Get wallet addresses

Ask the phantom MCP to retrieve the user's wallet addresses, then use them for transactions.

Transfer SOL

Use transfer_tokens to send SOL to a recipient address. The MCP handles transaction building, signing, and submission.

Sign a message

Use sign_message for wallet verification or authentication flows. The MCP routes to the correct chain based on the network parameter.

Important Notes

• Sessions persist locally in ~/.phantom-mcp/session.json
• This is preview software — use a separate wallet with minimal funds for testing
• The MCP server runs via stdio transport (launched by npx -y @phantom/mcp-server)