Runtime APIs

Last updated Jul 3, 2026 The Workers runtime ↗︎ is designed to be JavaScript standards compliant ↗︎ and web-interoperable. Wherever possible, it uses web platform APIs, so that code can be reused across client and server, as well as across WinterCG ↗︎ JavaScript runtimes.

Workers runtime features are compatible with a subset of Node.js APIs and the ability to set a compatibility date or compatibility flag.

• Bindings (env)
• Cache
• Console
• Context (ctx)
• Encoding
• EventSource
• Fetch
• Handlers
• Headers
• HTMLRewriter
• MessageChannel
• Node.js compatibility
• Performance and timers
• Remote-procedure call (RPC)
• Request
• Response
• Scheduler
• Streams
• TCP sockets
• Web Crypto
• Web standards
• WebAssembly (Wasm)
• WebSockets

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description: Worker Bindings that allow for interaction with other Cloudflare Resources. title: Bindings (env) image: https://developers.cloudflare.com/workers/runtime-apis/bindings/og.png?v=8ce2f2fc2792c44e

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