Build without boundaries

The Agents SDK gives you the primitives to build proactive, stateful AI agents on Cloudflare. Built-in memory, scheduling, email handling, and real-time communication: agents that don't just respond, but take initiative. Built-in memory Every agent instance has its own SQLite database. Persist conversation history, user preferences, and state without managing infrastructure. Proactive by design Agents can schedule tasks, respond to emails, handle webhooks, and send messages — not just wait for user input. Multiplayer by default Built-in WebSocket support and state synchronization. Multiple users can interact with the same agent instance in real-time. Each agent instance is a Durable Object with its own SQLite database. State persists automatically across requests and hibernation cycles. WebSockets with automatic hibernation, resumable streams, and state sync. Build chat, collaboration, or multiplayer experiences. Schedule tasks with cron expressions, respond to incoming emails, or trigger actions from webhooks and queue messages. Connect to any MCP server to give agents access to external tools, APIs, and data sources. Each agent instance is a Durable Object with its own SQLite database. State persists automatically across requests and hibernation cycles. WebSockets with automatic hibernation, resumable streams, and state sync. Build chat, collaboration, or multiplayer experiences. Schedule tasks with cron expressions, respond to incoming emails, or trigger actions from webhooks and queue messages. Connect to any MCP server to give agents access to external tools, APIs, and data sources. Build with the Agents SDK: Proactive assistants Real-time collaboration Messaging and notifications The Agents SDK handles state, streaming, and tool integration so you can focus on what your agent does. Join thousands of developers who've eliminated infrastructure complexity and deployed globally with Cloudflare. Start building for free — no credit card required.