How do I install Usno?

Copy the stdio config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.

Does Usno need an API key?

No required environment variable is listed on this record.

When was Usno last checked?

Last checked 2026-11-13. Sun rise and set, moon phases, twilight times and the seasons from the US Naval Observatory.

Usno MCP server

Power your agent

Add this server

The publisher's own command. Not a PlugMCP endpoint.

Add to Cursor Add to VS Code Run on PlugMCP

Host a copy with our keys and logs.

Local command

npx -y @mrfentmen/[email protected]

Claude Code has no install link for a local command. Copy the command below and run it in a terminal.

shClaude Code

1claude mcp add io.github.mrfentmen-usno-mcp -- npx -y @mrfentmen/usno-mcp@1.0.1

Run in a terminal.

jsonClaude Desktop

1{2  "mcpServers": {3    "io.github.mrfentmen-usno-mcp": {4      "command": "npx",5      "args": [6        "-y",7        "@mrfentmen/[email protected]"8      ]9    }10  }11}

claude_desktop_config.json

Local · npmPublisher installStep-by-step: add this in Claude

Remote URL or a command on your machine? How the two installs differ

Run on PlugMCP

Host a copy with our keys and logs.

A new server you create. It is not this listing's official endpoint. Use the publisher install when you want their URL and their credentials.

Launch

Server facts

Local

Transport: stdio
Version: 1.0.1
Last checked

Tools

No tool list yet. Remote servers get one after the first health check.

FAQ

Usno

Add this server

Host a copy with our keys and logs.

Server facts

Tools

Questions

How do I install Usno?

Does Usno need an API key?

What transport does Usno use?

When was Usno last checked?

Documentation