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Qnexus MCP Server

local only

Qnexus MCP runs on your own machine — the client starts it, so there is no endpoint to ping. 91 installs a week from pypi. Last commit 23 Jul 2026.

MCP server for Quantinuum Nexus, wrapping the qnexus SDK. Not affiliated with Quantinuum.

Installs per day peak 41 · avg 16 · -37% w/w
a month agotoday
91
Installs / week
pypi · qnexus-mcp
1
Stars
0 open issues
23 Jul 2026
Last commit
from GitHub
Apache-2.0
License
Python

What the code does

We read the source, 6 d ago · rules 995398eba69f

Evidence

Things with no honest explanation: a promise that contradicts the code, code that runs at install time while hiding what it does, data leaving the machine.

Name looks like a popular package nexus-mcp
qnexus-mcp похож на nexus-mcp

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

We found things in this code

Code changes quietly between releases, and nobody reads the diff of a dependency. We do, on every release — watch Qnexus MCP and you get told the day something new turns up.

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 qnexus-mcp -- uvx qnexus-mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "qnexus-mcp": {
      "command": "uvx",
      "args": [
        "qnexus-mcp"
      ]
    }
  }
}
~/.codex/config.toml
[mcp_servers.qnexus-mcp]
command = "uvx"
args = ["qnexus-mcp"]
.cursor/mcp.json
{
  "mcpServers": {
    "qnexus-mcp": {
      "command": "uvx",
      "args": [
        "qnexus-mcp"
      ]
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "qnexus-mcp": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "qnexus-mcp"
      ]
    }
  }
}

Optional settings from the registry entry, left out of the block above: QNEXUS_MCP_TOOLSETS (Comma-separated toolsets: read,execute,manage,destructive (default: read)), QNEXUS_MCP_ALLOW_SPEND (Permit credit-spending (HQC) execution (default: false)), QNEXUS_MCP_ALLOW_HARDWARE (Permit real-QPU targets (default: false)), QNEXUS_MCP_ALLOW_DESTRUCTIVE (Permit delete/cancel/archive tools (default: false)), QNEXUS_MCP_MAX_CREDITS (Hard per-call HQC ceiling; 0 blocks all spend (default: 0)), QNEXUS_MCP_MAX_OUTCOMES (Top-N cap on distinct measurement outcomes returned per result item (default: 100)), QNEXUS_MCP_MAX_SUBMISSIONS_PER_MINUTE (Sliding-window submission cap; each circuit in a batch counts as one (default: 6)), QNEXUS_MCP_PROJECTS (Comma-separated project allowlist, enforced on every mutating tool (default: all projects)).

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Qnexus MCP — questions

Answers built from our own checks of this server.

Why is there no uptime for Qnexus MCP?
Qnexus MCP 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 pypi package qnexus-mcp was installed 91 times last week.
How do I connect Qnexus MCP?
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 qnexus-mcp straight from pypi; nothing to host, nothing to sign up for.
How many people use Qnexus MCP?
The pypi package qnexus-mcp was installed 91 times in the last week. Week over week that is -37%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is Qnexus MCP open source?
Yes — it is published under the Apache-2.0 licence, written in Python and 1 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.