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Sigil MCP Server

local only

Sigil runs on your own machine — the client starts it, so there is no endpoint to ping. 329 installs a week from npm. Last commit 13 Sep 2026.

Local keystore + MCP server. Claude can sign EVM transactions but never sees the private key.

Installs per day peak 195 · avg 33 · -4% w/w
a month agotoday
329
Installs / week
npm · sigild
3
Stars
7 open issues
13 Sep 2026
Last commit
0 releases in 90 days
Apache-2.0
License
TypeScript

What the code does

We read the source, 13 min ago · rules 3dff92dd89df

In the project's build, not in the package

Found in continuous integration, deployment or infrastructure files, or in a neighbouring package of the same monorepo. None of this is installed when you add the server: it describes how the project is built and released. We list it because a leaked key in a build pipeline is still a real problem, but it is not something this server does on your machine.

Builds a database query by concatenation .github/workflows/lockfile-diff.yml:119
      - name: Post / update PR comment
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

Nothing serious here today

Today is the operative word: we check Sigil every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Three servers free · no card

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

run in your terminal
claude mcp add sigil -- npx -y sigild
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "sigil": {
      "args": [
        "-y",
        "sigild"
      ],
      "command": "npx"
    }
  }
}
~/.codex/config.toml
[mcp_servers.sigil]
command = "npx"
args = ["-y", "sigild"]
.cursor/mcp.json
{
  "mcpServers": {
    "sigil": {
      "args": [
        "-y",
        "sigild"
      ],
      "command": "npx"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "sigil": {
      "args": [
        "-y",
        "sigild"
      ],
      "command": "npx"
    }
  }
}

This one needs environment variables set before it will start: SIGIL_HOME (Override the default ~/.sigil directory for keyfiles, audit log, and control socket.), SIGIL_CONTROL_SOCK (Override the default control socket path (~/.sigil/control.sock).). The author declared them in the registry entry; get the values from the project itself.

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Sigil — questions

Answers built from our own checks of this server.

Why is there no uptime for Sigil?
Sigil runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the npm package sigild was installed 329 times last week.
How do I connect Sigil?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It runs locally, so the command pulls sigild straight from npm; nothing to host, nothing to sign up for.
How many people use Sigil?
The npm package sigild was installed 329 times in the last week. Week over week that is -4%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is Sigil open source?
Yes — it is published under the Apache-2.0 licence, written in TypeScript, 3 stars on GitHub and 7 open issues. The source link is on this page, so you can read exactly what it does with your data before you connect it.