> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://respan.ai/docs/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://respan.ai/docs/_mcp/server.

# RubyLLM (tracing)

> Use RubyLLM with Respan — gateway routing, model switching, and full observability.

[RubyLLM](https://rubyllm.com/) provides a unified Ruby interface for GPT, Claude, Gemini, and more. Since Respan is OpenAI-compatible, you can route all RubyLLM requests through the Respan gateway by pointing the OpenAI base URL to Respan and get full observability automatically.

#### Set up Respan

Create an account at [platform.respan.ai](https://platform.respan.ai) and grab an [API key](https://platform.respan.ai/platform/gateway/api-keys).

Run `npx @respan/cli setup` to set up with your coding agent.

#### Use Respan Gateway

See [RubyLLM gateway setup](/docs/gateway/ruby-llm) to route this integration through the Respan gateway.