developer.signalwire.com

> For a complete index of all SignalWire documentation pages, fetch https://signalwire.com/docs/llms.txt # SignalWire Documentation > Build powerful communication applications with SignalWire. Explore our REST APIs, Realtime SDKs, and comprehensive guides. <h1 class="fern-page-heading text-balance break-words"> Build on SignalWire </h1> Voice, video, messaging, and AI — one programmable platform, every interface you need. <strong>New to SignalWire?</strong> Set up your account, grab API credentials, and start building. Get started <h2> What are you building? </h2> #### [AI voice agent](/docs/platform/getting-started#ai-application) LLM-powered phone agents and virtual assistants #### [Browser or mobile](/docs/platform/getting-started#browser-or-mobile-app) WebRTC voice, video, and chat in your app #### [Server application](/docs/platform/getting-started#server-application) Backend call routing, SMS, and IVR systems #### [No-code](/docs/platform/getting-started#no-code--low-code) Drag-and-drop call flows and Dashboard AI agents <h2> Interfaces & SDKs </h2> <p class="fern-page-subtitle"> APIs, markup languages, and client libraries for building on SignalWire. </p> #### [REST APIs](/docs/apis) Complete API reference for voice, video, messaging, and AI services. #### [SWML](/docs/swml) Markup language that unifies LLMs, TTS, and STT with PSTN, SIP, and WebRTC. #### [Server SDKs](/docs/server-sdks) Build AI agents, control calls, send messages, and more. #### [Browser SDK](/docs/browser-sdk) Add video calling, audio calling, and chat directly to your website. <h2> Tools </h2> <p class="fern-page-subtitle"> No-code builders and utilities to accelerate development. </p> #### [Call Flow Builder](/docs/call-flow-builder) Build drag-and-drop calling applications without writing code. #### [Platform & Dashboard](/docs/platform) Manage your SignalWire space, phone numbers, and resources. #### [Wirestarter](/docs/platform/wirestarter