kcp-harness — KCP compliance proxy MCP Server

by cantara Your server? Claim it

local only

kcp-harness — KCP compliance proxy runs on your own machine — the client starts it, so there is no endpoint to ping. 217 installs a week from npm. Last commit 7 Oct 2026.

MCP compliance proxy between agent and tools: deterministic governance, fail-closed, audit trail.

Installs per day peak 45 · avg 13 · +24% w/w

a month agotoday

217

Installs / week

npm · kcp-harness

Stars

1 open issue

7 Oct 2026

Last commit

2 releases in 90 days

Apache-2.0

License

TypeScript

What the code does

We read the source, 5 h ago · rules 995398eba69f

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.

Runs an external command src/downstream.ts:50

    const conn = this.spawn(config);

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.

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.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add kcp-harness -- npx -y kcp-harness

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "kcp-harness": {
      "command": "npx",
      "args": [
        "-y",
        "kcp-harness"
      ]
    }
  }
}

~/.codex/config.toml

[mcp_servers.kcp-harness]
command = "npx"
args = ["-y", "kcp-harness"]

.cursor/mcp.json

{
  "mcpServers": {
    "kcp-harness": {
      "command": "npx",
      "args": [
        "-y",
        "kcp-harness"
      ]
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "kcp-harness": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "kcp-harness"
      ]
    }
  }
}

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kcp-harness — KCP compliance proxy — questions

Answers built from our own checks of this server.

Why is there no uptime for kcp-harness — KCP compliance proxy?

kcp-harness — KCP compliance proxy 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 kcp-harness was installed 217 times last week.

How do I connect kcp-harness — KCP compliance proxy?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It runs locally, so the command pulls kcp-harness straight from npm; nothing to host, nothing to sign up for.

How many people use kcp-harness — KCP compliance proxy?

The npm package kcp-harness was installed 217 times in the last week. Week over week that is +24%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is kcp-harness — KCP compliance proxy open source?

Yes — it is published under the Apache-2.0 licence, written in TypeScript, 0 stars on GitHub and 1 open issue. The source link is on this page, so you can read exactly what it does with your data before you connect it.