Classification Systems API
Convert between wire gauges, temperature scales, shoe sizes, barcodes, and hundreds of other classification systems.
What is Ground?
Classification Systems
Browse and search hundreds of standardized classification systems used across industries.
Value Conversions
Convert between equivalent values across different systems (e.g., AWG to mm², Celsius to Fahrenheit).
AI Integration
Connect Ground to Claude, ChatGPT, or Gemini via MCP for natural language queries.
REST API
Simple REST API with OpenAPI documentation. Free tier available.
Works with AI Assistants
Ground provides an MCP (Model Context Protocol) server that works with:
- Claude - Settings → Connectors → Add custom connector
- ChatGPT - Available in the App Directory
- Gemini CLI - Use the --mcp flag
Just connect and ask: "What's the IP65 rating equivalent in NEMA?"