Documentation
Everything you need to integrate with Claude — in any SDK format.
Quickstart
Send your first request in minutes. Point any SDK at one base URL.
IDE Integration
Use your key in Cursor, VS Code (Cline, Roo, Continue), and Codex.
Models
Claude Opus & Sonnet via one universal API. Capabilities and pricing.
API Reference
Multi-format endpoints: Anthropic Messages, OpenAI Chat Completions & Responses, streaming, and models.
Building Agents
Build a custom agent with any SDK. Which mode to pick, the tool-calling loop, and migrating from OpenAI or Anthropic.