EVM Wallet Signer MCP Server

Your private keys never leave your browser. Every transaction requires explicit approval in your own wallet (MetaMask, Rabby, TronLink, …). It runs locally over stdio via the published package.

People who work with blockchain, eip 6963 and ethereum and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in TypeScript.

VERIFIED ACTIVE

LAST COMMIT 2026-09-18 · ★ 3 · #141 OF 290 MAINTAINED BROWSER AUTOMATION · VERIFIED 2026-09-30

MIT · TypeScript servers · how we verify → /methodology

01 · Install EVM Wallet Signer

Claude Code

claude mcp add nikicat-mcp-wallet-signer -- npx -y mcp-wallet-signer

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "nikicat-mcp-wallet-signer": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-wallet-signer"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license MIT - declared in the repository

npm package mcp-wallet-signer - unscoped; check the name against the project README before installing

registry namespace io.github.nikicat is GitHub-verified and matches the repo owner

03 · What EVM Wallet Signer can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Limitations (from the README)

[!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-signer directly.

Latest releases

[email protected] · 2026-09-18

Fixes #2: 0.6.0 could not start at all - it imported browser-evm-signer, whose 0.3.0 exports pointed at a file its tarball didn't ship. · 0.7.0 is a thin MCP stdio shim over browser-web3-signer, which owns the bridge…

[email protected] · 2026-09-18

A compatibility shim over browser-web3-signer, which superseded this package. · WalletSigner - including triggerContract and deployContract - the network table and the TronGrid balance reads are unchanged. The…

[email protected] · 2026-09-18

Fixes the broken 0.3.0, whose exports pointed at ./esm/mod.js while the tarball shipped ./esm/browser-evm-signer/src/mod.js - every install failed to resolve (#2). · 0.3.1 is a compatibility shim over…

04 · Who maintains EVM Wallet Signer

EVM Wallet Signer is maintained by nikicat. It's the only MCP server we track from this author; the repo dates to Feb 2026.

05 · Facts

repository: github.com/nikicat/mcp-wallet-signer
website: https://github.com/nikicat/mcp-wallet-signer
category: browser automation - ranked #141 of 290 actively-maintained browser automation servers as of 2026-09-30.
release cadence: 3 releases in the last 90 days (latest 2026-09-18)
registry: io.github.nikicat/mcp-wallet-signer (active, first published 2026-02-10)
packages: npm:mcp-wallet-signer

06 · EVM Wallet Signer FAQ

What is EVM Wallet Signer?

Your private keys never leave your browser. Every transaction requires explicit approval in your own wallet (MetaMask, Rabby, TronLink, …). It runs locally over stdio via the published package.

Is EVM Wallet Signer still maintained?

Yes - as of 2026-09-30, its last commit was 2026-09-18 and it shipped 3 releases in the last 90 days. We re-verify nightly.

How do I install EVM Wallet Signer?

Run `npx -y mcp-wallet-signer`. You can also paste the ready-made client config above.

Does EVM Wallet Signer run locally?

Yes - it's a stdio server: it runs on your machine (via npx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to EVM Wallet Signer

Alternatives to EVM Wallet Signer

Maintained browser automation servers if EVM Wallet Signer isn't the fit.

Pairs well with

Servers that cover what EVM Wallet Signer doesn't - only shown when the pairing reason fits the companion.

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