EVM Wallet Signer
Routes blockchain transactions through your actual browser wallet instead of asking for private keys in config files. Exposes MCP tools for EVM chains (MetaMask, Rabby) via EIP-6963 and TRON via TronLink. You get connect_wallet, send_transaction, sign_message, sign_typed_data, plus balance lookups that work without opening a browser. Each signing operation spawns a local HTTP server and opens an approval page where you review the transaction in your wallet extension. Works with Ethereum, Polygon, Arbitrum, Base, and other EVM chains plus TRON mainnet and testnets. Reach for this when you want Claude to interact with smart contracts but need to approve every action yourself.
- GitHub stars
- 1
- tools
- 4
- transport
- STDIO
- env vars
- 2
- last updated
- Feb 10, 2026
Tools
4 toolsPublic tool metadata for what this MCP can expose to an agent.
connect_walletConnect a wallet, return the address
Connect a wallet, return the address
No parameter schema in public metadata yet.
send_transactionSend value or call a contract, return the tx hash
Send value or call a contract, return the tx hash
No parameter schema in public metadata yet.
sign_message`personal_sign` a message, return the signature
`personal_sign` a message, return the signature
No parameter schema in public metadata yet.
sign_typed_dataSign EIP-712 typed data, return the signature
Sign EIP-712 typed data, return the signature
No parameter schema in public metadata yet.
Sponsors
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EVM_MCP_PORTdefault: 3847HTTP server port for the browser approval UI (default: 3847)
EVM_MCP_DEFAULT_CHAINdefault: 1Default EVM chain ID (default: 1 for Ethereum mainnet)
Readme
mcp-wallet-signer
[!WARNING] Superseded by browser-web3-signer — the same browser-wallet signing flow, reimplemented in Rust with a CLI plus Rust/TypeScript/Go libraries. Everything published from this repo is now a thin compatibility shim over it, so existing installs keep working; new code should use
browser-web3-signerdirectly.
Your private keys never leave your browser. Every transaction requires explicit approval in your own wallet (MetaMask, Rabby, TronLink, …).
Most blockchain tooling wants a private key in a config file — full, unsupervised access to your funds. These packages route each request to the browser wallet you already use, so you review and approve it like any other dapp interaction.
Packages
Details
- Repository
- github.com/nikicat/mcp-wallet-signer
- Website
- github.com/nikicat/mcp-wallet-signer
- Category
- Web & Browser Automation
- Package
mcp-wallet-signer- Transport
- STDIO
- Registry
- MCP registry, active
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