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21st Agents SDK

SDK to add an Claude Code AI agent to your app

221upvotes

Launched March 7, 2026

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About 21st Agents SDK

21st Agents SDK is the fastest way to add an AI agent to your app. Define your agent in TypeScript, deploy in one command, and embed a production-ready chat UI with Built-in streaming, session management, usage billing, and observability — so you can focus on what makes your agent unique, not infrastructure. Backed by Y Combinator (W26).

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Category💻 Developer Tools

Upvotes221

Comments9

Launched3/7/2026

Topics

Developer ToolsArtificial IntelligenceSDK

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