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MCP Wallet Signer
MCPOpen SourceMIT31.2
by nikicat • Uncategorized
An MCP server that routes blockchain transactions to a browser wallet for user approval without exposing private keys.
Example Use Cases
- 1
Securely sign blockchain transactions without exposing private keys in config files.
- 2
Interact with EVM-compatible chains while requiring explicit user approval for each transaction.
- 3
Connect to a browser wallet to send transactions, sign messages, or check balances.
Description
MCP Wallet Signer enables secure transaction signing by routing every blockchain transaction to the user's browser wallet (e.g., MetaMask, Rabby) via EIP-6963. This approach ensures private keys never leave the browser and every transaction requires explicit user approval, eliminating risks of silent or unauthorized transactions. It supports multiple EVM-compatible chains and integrates seamlessly with MCP-compatible clients via stdio transport.
Capabilities(10 total)
Tools (5)
connect_wallet
Connect to a browser wallet and get the wallet address. IMPORTANT: This tool opens a browser window where the user must approve the connection. Tell the user to switch to their browser window to approve. This tool blocks until the user acts or the request times out (5 min).
chainId:numberaddress:string
send_transaction
Send a transaction (ETH transfer or contract call) via the connected browser wallet. IMPORTANT: This tool opens a browser window where the user must review and approve the transaction. Tell the user to switch to their browser window to approve. This tool blocks until the user acts or the request times out (5 min).
to:string*value:stringdata:stringchainId:numbergasLimit:stringmaxFeePerGas:stringmaxPriorityFeePerGas:string
sign_message
Sign an arbitrary message using personal_sign. IMPORTANT: This tool opens a browser window where the user must approve the signature. Tell the user to switch to their browser window to approve. This tool blocks until the user acts or the request times out (5 min).
message:string*address:stringchainId:number
sign_typed_data
Sign EIP-712 typed data. IMPORTANT: This tool opens a browser window where the user must review and approve the signature. Tell the user to switch to their browser window to approve. This tool blocks until the user acts or the request times out (5 min).
domain:object*types:object*primaryType:string*message:object*address:stringchainId:number
get_balance
Get the ETH balance of an address. Does not require browser interaction - reads directly from the blockchain.
address:string*chainId:number
Prompts (3)
send-eth
Send ETH to an address
amountaddresschain
check-balance
Check the ETH balance of a wallet address
addresschain
sign-message
Sign a message with the connected wallet
message
Resources (2)
Supported Chains
List of supported blockchain networks with chain IDs, RPC URLs, and native currencies
URI: wallet://chainsMIME: application/json
Server Configuration
Current MCP wallet signer configuration (default chain, port)
URI: wallet://configMIME: application/json
Quick Actions
Security
Scanned 2 month(s) agoRisk Level
MINIMAL
Read-only data retrieval, no side effects
Trust Score
C61/100
7/17 checks passed
Scores are informational only and provided “as is” without warranty. AgentHotspot assumes no liability for actions taken based on these ratings.
Quick Stats
Service TypeMCP
Pricing ModelFree
Capabilities5 Tools / 3 Prompts / 2 Resources
Ownernikicat
CategoryUncategorized
DependenciesStandalone
Tags
ai-agentblockchaineip-6963ethereummcpmetamaskmodel-context-protocolnon-custodialtypescriptwalletweb3