Claude Agent SDK
Free tier availableBuild custom AI agents on Claude
About Claude Agent SDK
Anthropic's framework for building production AI agents on top of Claude — with built-in tool use, file system access, code execution, and the same orchestration that powers Claude Code itself. The most direct path for developers who want agent capabilities without rebuilding the harness from scratch, and the official SDK to use when you need to ship agents on Claude in production.
How Claude Agent SDK compares
| Rating | 0 | 0 | 0 | 0 |
| Reviews | — | — | — | — |
| Price | Pay per token | Included with ChatGPT | Free | Contact for pricing |
| Free tier | Free tier available | Free tier available | Free | Free tier available |
| API access | ✓ | ✗ | ✓ | ✓ |
Alternatives to Claude Agent SDK
OpenAI's official Chrome extension that lets Codex navigate web pages and complete multi-step tasks directly in the browser — fill forms, scrape data, drive web apps without copy-pasting between tabs. Browser-native agents are the new assistant battleground, and this is the most polished option for ChatGPT users who want their AI to actually do the work rather than just describe it.
Open-source browser automation built on Bun rather than Node, with an API designed for AI agent workflows from the ground up. Faster startup and lower memory overhead than Puppeteer or Playwright when spinning up disposable browser sessions for agents to drive — useful for any developer building autonomous web tasks at scale.
Schedules recurring AI agent runs with one command and zero infrastructure — no servers, queues, or wrappers required. The plumbing layer for anyone running agents that need to wake up on a schedule rather than only on a user prompt, which covers most production agent use cases once you move past chat.