For AI agents: a documentation index is available at the root level at /llms.txt and /llms-full.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.
Opt-in to surface routing metadata on the response under openrouter_metadata. Defaults to disabled. The legacy header X-OpenRouter-Experimental-Metadata is also accepted for backward compatibility.
{"max_tokens": 150,"messages": [{"content": "You are a helpful assistant.","role": "system"}, {"content": "What is the capital of France?","role": "user"} ], “model”: “openai/gpt-4”, “temperature”: 0.7 }
