Phantom Wallet MCP

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)