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

To add qnexus-mcp to Claude, run the install command below or copy the ready-made config for Claude Code, Claude Desktop, Cursor and VS Code further down. Restart your client after adding it and its tools show up in your next conversation. It declares 8 environment variables, listed below.

DevTools

Install

uvx qnexus-mcp@0.2.0

Environment variables

QNEXUS_MCP_TOOLSETSSet in your MCP config
QNEXUS_MCP_ALLOW_SPENDSet in your MCP config
QNEXUS_MCP_ALLOW_HARDWARESet in your MCP config
QNEXUS_MCP_ALLOW_DESTRUCTIVESet in your MCP config
QNEXUS_MCP_MAX_CREDITSSet in your MCP config
QNEXUS_MCP_MAX_OUTCOMESSet in your MCP config
QNEXUS_MCP_MAX_SUBMISSIONS_PER_MINUTESet in your MCP config
QNEXUS_MCP_PROJECTSSet in your MCP config

Set only if the maker requires them; this listing does not flag any of them as required.

Install with your client

Terminal
claude mcp add qnexus --env QNEXUS_MCP_TOOLSETS=<YOUR_QNEXUS_MCP_TOOLSETS> --env QNEXUS_MCP_ALLOW_SPEND=<YOUR_QNEXUS_MCP_ALLOW_SPEND> --env QNEXUS_MCP_ALLOW_HARDWARE=<YOUR_QNEXUS_MCP_ALLOW_HARDWARE> --env QNEXUS_MCP_ALLOW_DESTRUCTIVE=<YOUR_QNEXUS_MCP_ALLOW_DESTRUCTIVE> --env QNEXUS_MCP_MAX_CREDITS=<YOUR_QNEXUS_MCP_MAX_CREDITS> --env QNEXUS_MCP_MAX_OUTCOMES=<YOUR_QNEXUS_MCP_MAX_OUTCOMES> --env QNEXUS_MCP_MAX_SUBMISSIONS_PER_MINUTE=<YOUR_QNEXUS_MCP_MAX_SUBMISSIONS_PER_MINUTE> --env QNEXUS_MCP_PROJECTS=<YOUR_QNEXUS_MCP_PROJECTS> -- uvx qnexus-mcp@0.2.0

Run this in a terminal to add the server to Claude Code.

What this does

qnexus-mcp exposes a set of tools to Claude over the Model Context Protocol. After you add it to claude_desktop_config.json (snippet above) and restart Claude Desktop, those tools become callable inside any conversation.

Requirements

This server declares the following environment variables. Set only the ones the maker requires for your setup; this listing does not flag any of them as required:

QNEXUS_MCP_TOOLSETS
QNEXUS_MCP_ALLOW_SPEND
QNEXUS_MCP_ALLOW_HARDWARE
QNEXUS_MCP_ALLOW_DESTRUCTIVE
QNEXUS_MCP_MAX_CREDITS
QNEXUS_MCP_MAX_OUTCOMES
QNEXUS_MCP_MAX_SUBMISSIONS_PER_MINUTE
QNEXUS_MCP_PROJECTS

Set these via the env object in your MCP config (see claude_desktop_config.json snippet above).

Frequently asked questions

How do I install qnexus-mcp?

Run the Claude Code command in the install section to add qnexus-mcp to Claude Code, or copy the ready-made config for your client from the install section on this page. Restart your client afterwards and the tools appear in your next conversation.

Which clients work with qnexus-mcp?

This page carries setup and config for Claude Code, Claude Desktop, Cursor and VS Code. Any other MCP client that accepts a standard server config can connect to qnexus-mcp as well.

Does qnexus-mcp need an API key?

This listing does not flag an API key as required. The server can use these environment variables: QNEXUS_MCP_TOOLSETS, QNEXUS_MCP_ALLOW_SPEND, QNEXUS_MCP_ALLOW_HARDWARE, QNEXUS_MCP_ALLOW_DESTRUCTIVE, QNEXUS_MCP_MAX_CREDITS, QNEXUS_MCP_MAX_OUTCOMES, QNEXUS_MCP_MAX_SUBMISSIONS_PER_MINUTE, QNEXUS_MCP_PROJECTS; the maker's docs say which of them your setup needs. They go in the env block of your MCP config.

Imported from the Official MCP Registry. The details above come from the registry entry; the maker can claim this listing to correct them, add docs, and see its traffic.

Is this your MCP server?

Claim this listing to see its traffic, fix details yourself, and skip the review queue on future updates.

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