---
title: Runtime APIs
description: Explore the JavaScript and web platform APIs available in the Cloudflare Workers runtime.
image: https://developers.cloudflare.com/dev-products-preview.png
---

> Documentation Index  
> Fetch the complete documentation index at: https://developers.cloudflare.com/workers/llms.txt  
> Use this file to discover all available pages before exploring further.

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# Runtime APIs

The Workers runtime is designed to be [JavaScript standards compliant ↗](https://ecma-international.org/publications-and-standards/standards/ecma-262/) 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 ↗](https://wintercg.org/) JavaScript runtimes.

[Workers runtime features](https://developers.cloudflare.com/workers/runtime-apis/) are [compatible with a subset of Node.js APIs](https://developers.cloudflare.com/workers/runtime-apis/nodejs) and the ability to set a [compatibility date or compatibility flag](https://developers.cloudflare.com/workers/configuration/compatibility-dates/).

* [ Bindings (env) ](https://developers.cloudflare.com/workers/runtime-apis/bindings/)
* [ Cache ](https://developers.cloudflare.com/workers/runtime-apis/cache/)
* [ Console ](https://developers.cloudflare.com/workers/runtime-apis/console/)
* [ Context (ctx) ](https://developers.cloudflare.com/workers/runtime-apis/context/)
* [ Encoding ](https://developers.cloudflare.com/workers/runtime-apis/encoding/)
* [ EventSource ](https://developers.cloudflare.com/workers/runtime-apis/eventsource/)
* [ Fetch ](https://developers.cloudflare.com/workers/runtime-apis/fetch/)
* [ Handlers ](https://developers.cloudflare.com/workers/runtime-apis/handlers/)
* [ Headers ](https://developers.cloudflare.com/workers/runtime-apis/headers/)
* [ HTMLRewriter ](https://developers.cloudflare.com/workers/runtime-apis/html-rewriter/)
* [ MessageChannel ](https://developers.cloudflare.com/workers/runtime-apis/messagechannel/)
* [ Node.js compatibility ](https://developers.cloudflare.com/workers/runtime-apis/nodejs/)
* [ Performance and timers ](https://developers.cloudflare.com/workers/runtime-apis/performance/)
* [ Remote-procedure call (RPC) ](https://developers.cloudflare.com/workers/runtime-apis/rpc/)
* [ Request ](https://developers.cloudflare.com/workers/runtime-apis/request/)
* [ Response ](https://developers.cloudflare.com/workers/runtime-apis/response/)
* [ Scheduler ](https://developers.cloudflare.com/workers/runtime-apis/scheduler/)
* [ Streams ](https://developers.cloudflare.com/workers/runtime-apis/streams/)
* [ TCP sockets ](https://developers.cloudflare.com/workers/runtime-apis/tcp-sockets/)
* [ Web Crypto ](https://developers.cloudflare.com/workers/runtime-apis/web-crypto/)
* [ Web standards ](https://developers.cloudflare.com/workers/runtime-apis/web-standards/)
* [ WebAssembly (Wasm) ](https://developers.cloudflare.com/workers/runtime-apis/webassembly/)
* [ WebSockets ](https://developers.cloudflare.com/workers/runtime-apis/websockets/)

```json
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```