Ethereum & EVM Message Signing MCP server

by nirholas·io.github.nirholas/signing-mcp-server·v1.0.0·29 stars

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Sign Ethereum messages - EIP-191, EIP-712 typed data, Permit2, signature verification and recovery

A92/100grade A

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Safety scan

A92/100

full report

Adoption

Growing

29 stars21 downloads/wk

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Ethereum & EVM Message Signing tools (14)

write = sends, deletes, buys or posts

Read from the package source without running it. The installed server may list more.

compose_signature
Compose a signature from v, r, s components.
decompose_signature
Decompose a 65-byte signature into v, r, s components.
get_typed_data_template
Get a template for common EIP-712 typed data structures.
hash_typed_data
Compute the EIP-712 hash of typed data without signing.
normalize_signature
Normalize a signature to a specific v format.
recover_signer
Recover the signer address from a signed message.
recover_typed_data_signer
Recover the signer address from an EIP-712 typed data signature.
sign_hash
Sign a raw 32-byte hash (DANGEROUS - requires acknowledgement).
sign_message
Sign a text message using EIP-191 (personal_sign) format.
sign_message_hex
Sign hex-encoded bytes using EIP-191 format.
sign_typed_data
Sign EIP-712 typed structured data.
validate_signature_format
Validate and analyze a signature's format.
verify_message
Verify an EIP-191 signed message.
verify_typed_data
Verify an EIP-712 typed data signature.

Public scan report

scanner v0.1.10 · 2026-11-14 · same rubric, same numbers if you re-run it

no findings

Code scan19 source files scanned25/25
–Live reliabilityno gateway calls yet and no remote to proben/a
–Tool poisoningtools not inspected (local package is not executed); not countedn/a
Auth qualitylocal package, no credentials required12/15
Maintenancelast push 1 days ago15/15
Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10

Overall 92/100. Components that don't apply are left out of the denominator. Any critical finding is an F.Rubric Appeal a finding JSON

How Ethereum & EVM Message Signing compares

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score: 92/100; higher than 93% of 48,114 servers
Tools: 14; the typical server has 7
Tools that change things: 0%; typical: 0%. Fewer write tools means less an agent can break
GitHub stars: 29; more than 91% of 28,851 servers
Downloads a week: 21; more than 5% of 15,093 servers with a package

What its tools let an agent do: 14 read

Install Ethereum & EVM Message Signing in Claude Code, Cursor or VS Code

claude mcp add signing-mcp-server -- uvx signing-mcp-server

Add to Cursor

What the publisher says

From the Ethereum & EVM Message Signing repository's README, as published. We do not edit it. Read it on GitHub

Ethereum Wallet Toolkit

A collection of Ethereum wallet tools: Python CLI utilities (ethtoolkit.py, wallet.py, keystore.py, sign.py, transaction.py, typeddata.py, validate.py, vanity.py), five Model Context Protocol (MCP) servers exposing wallet functionality to AI assistants, a fully offline single-file HTML wallet (offline.html), and an x402 payment facilitator. See the sections below for each component.

Offline Build - Official Ethereumjs Libraries

This directory contains the build system to create offline1.html using official ethereumjs libraries.

Libraries Used

All libraries are from the official Ethereum ecosystem:

@ethereumjs/tx - Transaction signing (legacy + EIP-1559)
@ethereumjs/util - Utilities (address validation, checksums, etc.)
@ethereumjs/rlp - RLP encoding
@ethereumjs/wallet - Wallet utilities
ethereum-cryptography - Official cryptographic primitives (secp256k1, keccak256)
@scure/bip39 - BIP39 mnemonic (used by ethereumjs)
@scure/bip32 - BIP32 HD derivation (used by ethereumjs)

Build Instructions

# Navigate to this directory
cd offline-build

# Install dependencies
npm install

# Build offline1.html
npm run build

The output file offline1.html will be created in the parent directory.

What Gets Bundled

The build process uses esbuild to:

Bundle all ethereumjs libraries and their dependencies
Minify the code for smaller file size
Inline everything into a single HTML file

Typical bundle size: ~400-600 KB (varies by version)

Features

All features match the CLI tool:

Wallet Generation - Random keypair generation
Mnemonic Support - Create/restore BIP39 mnemonics, derive accounts
Vanity Addresses - All vanity options (prefix, suffix, regex, etc.)
Message Signing - EIP-191 personal_sign
Signature Verification - Recover signer from signature
Validation - Address and key validation
Keystore - V3 keystore encrypt/decrypt (PBKDF2)
Transactions - Sign legacy and EIP-1559 transactions offline
EIP-712 - Typed data signing and verification

Security

The generated HTML file is completely self-contained
No external network requests
Can be saved and used on an air-gapped machine
Uses official, audited Ethereum libraries

MCP Servers

This repository includes 5 Model Context Protocol (MCP) servers that expose Ethereum wallet functionality to AI assistants like Claude.

Documentation

Prompt Examples - Real-world prompts for interacting with the servers
Testing Guide - How to run and write tests
Integration Guide - Setting up with Claude Desktop and other tools
Workflows & Recipes - Common workflows combining multiple servers

Overview

Total: 57 tools, 348 tests

Quick Start

Installation

Each server is a standalone Python package:

# Install all servers
pip install -e ./ethereum-wallet-mcp
pip install -e ./keystore-mcp-server
pip install -e ./signing-mcp-server
pip install -e ./transaction-mcp-server
pip install -e ./validation-mcp-server

Claude Desktop Configuration

Add to your claudedesktopconfig.json:

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

Ethereum & EVM Message Signing: common questions

Is Ethereum & EVM Message Signing MCP server safe?: Yes, by our scan: it is graded A (92/100). Read the Ethereum & EVM Message Signing safety report
How do I install Ethereum & EVM Message Signing?: It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does Ethereum & EVM Message Signing need an API key?: Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Ethereum & EVM Message Signing maintained?: The last commit was 2 days ago (2026-11-13). The latest release is v1.0.0.
How does Ethereum & EVM Message Signing compare with other MCP servers?: safety score 92/100 (higher than 93% of 48,114 servers); tools 14 (the typical server has 7); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.