NestDaddy

Nav Substrate

io.github.Wchampe/nav-substrate ยท v0.1.1

Relativistic navigation calcs for agents: time dilation, trip planning, chronometry, gamma.

Connect Runs on your machine

Terminal
claude mcp add nav-substrate -e NAV_SERVICE_API_KEY=<NAV_SERVICE_API_KEY> -e NAV_SERVICE_URL=<NAV_SERVICE_URL> -e NAV_SERVICE_LOCAL=<NAV_SERVICE_LOCAL> -- uvx nav-substrate-mcp==0.1.1
claude_desktop_config.json
{
  "mcpServers": {
    "nav-substrate": {
      "command": "uvx",
      "args": [
        "nav-substrate-mcp==0.1.1"
      ],
      "env": {
        "NAV_SERVICE_API_KEY": "<NAV_SERVICE_API_KEY>",
        "NAV_SERVICE_URL": "<NAV_SERVICE_URL>",
        "NAV_SERVICE_LOCAL": "<NAV_SERVICE_LOCAL>"
      }
    }
  }
}
~/.cursor/mcp.json
{
  "mcpServers": {
    "nav-substrate": {
      "command": "uvx",
      "args": [
        "nav-substrate-mcp==0.1.1"
      ],
      "env": {
        "NAV_SERVICE_API_KEY": "<NAV_SERVICE_API_KEY>",
        "NAV_SERVICE_URL": "<NAV_SERVICE_URL>",
        "NAV_SERVICE_LOCAL": "<NAV_SERVICE_LOCAL>"
      }
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "nav-substrate": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "nav-substrate-mcp==0.1.1"
      ],
      "env": {
        "NAV_SERVICE_API_KEY": "<NAV_SERVICE_API_KEY>",
        "NAV_SERVICE_URL": "<NAV_SERVICE_URL>",
        "NAV_SERVICE_LOCAL": "<NAV_SERVICE_LOCAL>"
      }
    }
  }
}

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools

This server runs locally, so its tools are listed by your MCP client once it starts.

Environment variables

NameDescription
NAV_SERVICE_API_KEY
Optional
Your Nav Substrate API key (or 'demo').
NAV_SERVICE_URL
Optional
Base URL of the hosted API.
NAV_SERVICE_LOCAL
Optional
Set to 1 to run the calc core in-process (offline, no metering).

Details

Package[email protected] (PYPI, stdio)
First published9 Sep 2026
Last updated9 Sep 2026
Registry nameio.github.Wchampe/nav-substrate

More ai and media servers See all

Listing data from the official MCP registry. Status and tools from NestDaddy's daily check. Browse all MCP servers.