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agent-custody MCP Server

local only

agent-custody runs on your own machine — the client starts it, so there is no endpoint to ping. 394 installs a week from npm. Last commit 15 Oct 2026.

MCP gateway that checks each agent tool call against a signed grant and policy, and signs a receipt

Installs per day peak 1 509 · avg 170 · -77% w/w
a month agotoday
394
Installs / week
npm · @agent-custody/receipts
8
Stars
16 open issues
15 Oct 2026
Last commit
43 releases in 90 days
Apache-2.0
License
TypeScript

What the code does

We read the source, 20 h ago · rules ccca72095570

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

    "payload": "eyJfdHlwZSI6Imh0dHBzOi8vaW4tdG90by5pby9TdGF0ZW1lbnQvdjEiLCJwcmVkaWNhdGUiOnsiYWdlbnQiOnsiaWQiOiJjbGF1ZGUtY29kZSIsInByb3ZlbmFuY2UiOiJjbGFpbWVkIn0sImV4ZWN1dGlvbiI6eyJwcm92ZW5hbmNlIjoiY2xhaW1lZCIsInJlYXNvbiI6InBvbGljeTEiLCJzdGF0dXMiOiJkZW5pZWQifSwiZmFjdHMiOnt9LCJpc3N1…

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

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

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 agent-custody -- npx -y @agent-custody/receipts
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "agent-custody": {
      "args": [
        "-y",
        "@agent-custody/receipts"
      ],
      "command": "npx"
    }
  }
}
~/.codex/config.toml
[mcp_servers.agent-custody]
command = "npx"
args = ["-y", "@agent-custody/receipts"]
.cursor/mcp.json
{
  "mcpServers": {
    "agent-custody": {
      "args": [
        "-y",
        "@agent-custody/receipts"
      ],
      "command": "npx"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "agent-custody": {
      "args": [
        "-y",
        "@agent-custody/receipts"
      ],
      "command": "npx"
    }
  }
}

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same job, measured the same way
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Fail-closed Cedar policy gate + Ed25519 signed receipts for agent tool calls. Denies on any error.

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answering
SafeNode MCP Gateway
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Policy proxy for MCP tool calls. A denied call never reaches the downstream server.

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agent-custody — questions

Answers built from our own checks of this server.

Why is there no uptime for agent-custody?
agent-custody 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 @agent-custody/receipts was installed 394 times last week.
How do I connect agent-custody?
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 @agent-custody/receipts straight from npm; nothing to host, nothing to sign up for.
How many people use agent-custody?
The npm package @agent-custody/receipts was installed 394 times in the last week. Week over week that is -77%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is agent-custody open source?
Yes — it is published under the Apache-2.0 licence, written in TypeScript, 8 stars on GitHub and 16 open issues. The source link is on this page, so you can read exactly what it does with your data before you connect it.