About phantom-wallet-mcp
phantom-wallet-mcp is a skill for interacting with a user's Phantom wallet through the phantom MCP server. It supports address lookup, signing, transfers, and Solana token swap quotes across the networks listed in its README.
Key features
- 01Retrieve wallet addresses
- 02Sign transactions and messages
- 03Transfer SOL and SPL tokens
- 04Fetch Solana swap quotes
- 05Support listed networks across four chains
Use cases
- 01Retrieve addresses for a connected wallet
- 02Sign a transaction or authentication message
- 03Send SOL or SPL tokens
- 04Request a Solana token swap quote
MCP support
Connects to the phantom MCP server, which exposes wallet address, signing, transfer, and token quote operations to MCP clients. The server uses stdio transport and requires a PHANTOM_APP_ID.
Install
Copy the command and run it in a terminal.
npx skills add https:/After installing, type/phantom-wallet-mcpin Claude Code to confirm it loaded.
Details
From the project READMEPhantom 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)