--- title: Voice API on the Carrier Network | Telnyx canonical: https://telnyx.com/products/voice-api --- # Voice API on the Carrier Network | Telnyx **Build Voice Experiences with AI-ready** # Voice API Deploy seamless communication experiences with developer-friendly APIs, transparent pricing, and scalable infrastructure built for global voice applications. [Talk to an expert](https://telnyx.com/contact-us)[Sign up](https://telnyx.com/sign-up) ## 140+countries supported ## 25M+API requests daily ## 10M+ call minutes per day **WHY TELNYX** ## Why leading companies choose Telynx Voice API * ### Global reach Full programmatic control over PSTN voice services in 130+ countries. As a licensed carrier, we deliver secure, compliant, and reliable infrastructure. So you can scale your voice application confidently. * ### Ultra-low latency Voice traffic stays on a private backbone with AI and telephony infrastructure co-located for faster response times. With PoPs in 18 regions, round trip time stays under 200 ms so your IVRs and AI voice agents feel instant for every caller. * ### Cost-effective pricing Most CPaaS providers buy carrier capacity, add a markup. With Telnyx Voice API, you get usage-based pricing with no hidden fees, no third-party markups, and no upfront investment in infrastructure. Up to 50%+ cost savings when switching from other providers. FEATURES ## Powerful Voice API features Telnyx Voice API gives developers everything they need to build scalable, reliable and programmable voice infrastructure, including AI powered call flows. * Real-time media streaming Stream bi-directional RTP audio over secure WebSockets. Ideal for voice-AI assistants and real-time coaching platforms that analyse speech on the fly and deliver instant, context-aware feedback. * Speech-to-text Convert voice to text in real-time with low-latency, high accuracy engines from Telnyx, Deepgram, Whisper, Turbo Grok STT or AssemblyAI * Text-to-speech Play dynamic, natural-sounding voices in 100+ languages and accents using synthesized speech. * Conversational AI commands Add voice agents to any call in minutes by chaining TTS, STT, and LLM logic via simple AI Gather and AI Assistant commands. * Call control Take full control of every leg of a call with one-line API commands. Route callers, move them between endpoints, or cleanly end sessions in real time. * Browser/App Calling Easily integrate calling into your web and mobile applications with the power of WebRTC. Our Voice SDKs are available for web, iOS, and Android. “Telnyx has been an excellent partner in our new integration. They've helped us unlock new regions that we were unable to service in the past and added resiliency to our platform” Dave Bullock CTO of UJET VOICE API FOR DEVELOPERS ## Build smarter voice applications with flexible APIs With Telnyx’s REST APIs, you can effortlessly create dynamic call flows and integrate AI into the mix without telephony expertise.Your team can go from prototype to production easily with detailed developer documents and 24/7 free support. Go to market fast, scale rapidly, and keep your focus entirely on innovation. [Explore Dev Docs](https://developers.telnyx.com/docs/voice/programmable-voice/get-started) Dial ``` curl -X POST https://api.telnyx.com/v2/calls \ -H "Authorization: Bearer $TELNYX_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "connection_id": "1234567890", "to": "+13125550123", "from": "+13125550456" }' ``` Record ``` curl -X POST https://api.telnyx.com/v2/calls/{call_control_id}/actions/record_start \ -H "Authorization: Bearer $TELNYX_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "format": "mp3", "channels": "single" }' ``` Suppression start ``` curl -X POST https://api.telnyx.com/v2/calls/{call_control_id}/actions/suppression_start \ -H "Authorization: Bearer $TELNYX_API_KEY" \ -H "Content-Type: application/json" \ -d '{}' ``` Gather using AI ``` curl -X POST https://api.telnyx.com/v2/calls/{call_control_id}/actions/gather_using_ai \ -H "Authorization: Bearer $TELNYX_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "parameters": { "type": "object", "properties": { "age": { "type": "integer" } }, "required": ["age"] }, "greeting": "Hi! How old are you?" }' ``` DialRecordSuppression startGather using AI ## Build faster with AI Telnyx Agent Skills provides pre-built tools for AI coding agent like Claude Code, Cursor, and Windsurf to integrate with the Telnyx API in minutes. Available in Python, JavaScript, Go, Java, and Ruby. Let your AI coding assistant write Telnyx integrations. Build in minutes. [Learn more](https://www.telnyx.com/resources/ai-agent-skills-claude-code) **PRICING** ## See our Voice API pricing Customers can save up to 50% by switching to Telnyx with lower per-minute rates, automatic volume discounts, and no hidden fees. Starting at $0.002 per minute [See pricing](https://telnyx.com/pricing/call-control) PRODUCTS ## Build with Voice API * [![Voice AI Agents](https://d2efw2akbx8gaf.cloudfront.net/https://dotcom-payload-assets-prod.s3.us-east-1.amazonaws.com/cms-media/Voice_AI_Agent_2x.webp?width=1024&format=webp)Voice AI AgentsBuild and deploy low-latency Voice AI agents in minutes on a full-stack, conversational AI platform. Take control of voices, languages, and call flows.](https://telnyx.com/products/voice-ai-agents) * [![In app and browser calling](https://d2efw2akbx8gaf.cloudfront.net/https://dotcom-payload-assets-prod.s3.us-east-1.amazonaws.com/cms-media/Browser-APP-calling-ded2ddfc.png?width=901&format=webp)WebRTCEasily integrate calling into your web and mobile applications with the power of WebRTC. Our Voice SDKs are available for web, iOS, and Android.](https://telnyx.com/products/webrtc) * [![Text-to-Speech](https://d2efw2akbx8gaf.cloudfront.net/https://dotcom-payload-assets-prod.s3.us-east-1.amazonaws.com/cms-media/tts.webp?width=512&format=webp)Text-to-SpeechOne API for leading voice engines. Access ElevenLabs, MiniMax, Resemble AI, and others without lock-in.](https://telnyx.com/products/text-to-speech-api) * [![Speech-to-Text](https://d2efw2akbx8gaf.cloudfront.net/https://dotcom-payload-assets-prod.s3.us-east-1.amazonaws.com/cms-media/Speech-to-Text.webp?width=1024&format=webp)Speech-to-TextAccess Deepgram, Whisper, and other leading transcription engines through a single API. Our edge-hosted architecture lets you switch engines without rearchitecting your stack.](https://telnyx.com/products/speech-to-text-api) ## Sign up and start building. [Sign up](https://telnyx.com/sign-up)[Talk to an expert](https://telnyx.com/contact-us) ## FAQ ### What is a Voice API? A Voice API is a tool that developers use to make and receive phone calls using an Application Programming Interface (API). A Voice API connects internet-based applications to the Public Switched Telephone Network (PSTN). ### How do I build with the Telnyx Voice API? ### Can I record calls with a Voice API? ### Does Telnyx offer text-to-speech capabilities? ### How much does the Telnyx Voice API cost? ### Can I use XML code with the Telnyx Voice API? ### What use cases does the Telnyx Voice API support? ### How can I use AI with Telnyx Voice API? **Resources, Docs, Support** ## Voice API hub * ### Telnyx Voice Product Suites Overview | Telnyx Telnyx Voice Product Suites Overview [Read more](https://developers.telnyx.com/docs/voice/overview) * ### Telnyx Programmable Voice | Telnyx Telnyx's Developer Portal is your one-stop shop for all things Programmable Voice. From here you can learn how to get started, explore our API reference, and find code samples and other resources. [Read more](https://developers.telnyx.com/docs/voice/programmable-voice/get-started) * ### Fundamentals | Telnyx Overview [Read more](https://developers.telnyx.com/docs/voice/programmable-voice/voice-api-fundamentals) * ### Voice API Commands and Resources | Telnyx The following endpoints can be used with the Voice API applications. [Read more](https://developers.telnyx.com/docs/voice/programmable-voice/voice-api-commands-and-resources) * ### Webhooks | Telnyx Overview [Read more](https://developers.telnyx.com/docs/voice/programmable-voice/voice-api-webhooks) * ### Voice APIs | Telnyx Our Voice products make it possible for you to programmatically manage calls, manage outbound voice traffic, and send/receive faxes. [Read more](https://developers.telnyx.com/api/voice) * ### List call control applications API | Telnyx Return a list of call control applications. [Read more](https://developers.telnyx.com/api/call-control/list-call-control-applications) * ### Retrieve a phone number with voice settings API | Telnyx Retrieve a phone number with voice settings [Read more](https://developers.telnyx.com/api/numbers/get-phone-number-voice-settings) * ### List connections API | Telnyx Returns a list of your connections irrespective of type. [Read more](https://developers.telnyx.com/api/connections/list-connections) * ### Dial API | Telnyx Dial a number or SIP URI from a given connection. A successful response will include a `call_leg_id` which can be used to correlate the command with subsequent webhooks. [Read more](https://developers.telnyx.com/api/call-control/dial-call) * ### What is Voice API? Programmable Voice Explained What is a voice API? Our comprehensive guide to programmable voice for developers breaks down cost, use cases, and incredible voice API features. [Read more](https://telnyx.com/resources/what-is-voice-api) * ### Call Control : Telnyx Launches New Programmable Voice API The Telnyx voice API allows customers to connect and control calls programmatically, all over the globe. [Read more](https://telnyx.com/resources/telnyx-launches-programmable-voice-api-call-control) * ### Telnyx Voice API vs. TeXML: What’s the difference? You can use either Telnyx Voice API or TeXML to build advanced voice capabilities into your applications. Learn which tool is right for your project. [Read more](https://telnyx.com/resources/voice-api-vs-texml) * ### Customer spotlight: Using Telnyx Voice API with OpenAI A developer in Turkey leveraged Telnyx and OpenAI to call thousands of pharmacies to find medication during a shortage. [Read more](https://telnyx.com/resources/customer-spotlight-using-telnyx-voice-api-with-openai) * ### ChatGPT Voice API vs. Telnyx: Best voice API for business Compare ChatGPT Voice API and Telnyx Voice API to find the best option for business communications. Explore features, pricing, and real-time AI capabilities. [Read more](https://telnyx.com/resources/chatgpt-voice-api-vs-telnyx) * ### Telnyx vs Twilio: Voice API comparison for 2025 Telnyx vs Twilio: See which voice API gives you lower latency, better pricing, and full-stack control for global communications. [Read more](https://telnyx.com/resources/telnyx-vs-twilio-which-voice-api-is-better) * ### Foundational tools for building future-ready voice solutions Learn what your organization needs to build innovative voice solutions that will meet the demands of modern businesses and consumers. [Read more](https://telnyx.com/resources/build-future-voice-solutions) * ### \[Video walkthrough\] Getting started with Telnyx Voice API Join VP of Business Development Mclain Roth as he walks through the setup steps to get started using Telnyx Voice API (Call Control). [Read more](https://telnyx.com/resources/getting-started-with-call-control) * ### How AI-powered voice tools elevate customer conversations Learn how voice AI is changing customer communication, improving efficiency, and reducing costs. [Read more](https://telnyx.com/resources/enhance-voice-solutions-with-ai) * ### Voice AI Agents—Quickly build and launch | Ultra-low latency Build and launch powerful Voice AI Agents faster and cheaper with Telnyx. Ultra-low latency, unmatched call quality, total control. [Read more](https://telnyx.com/resources/voice-ai-technology-customer-experience) * ### The Better Twilio Alternative - Telnyx Switch to Telnyx for a better Twilio alternative. Benefit from our competitive pricing, private global network, and award-winning support. [Read more](https://telnyx.com/the-better-twilio-alternative) * ### The better Vonage Voice API alternative - Telnyx Switch to Telnyx for a better Vonage voice alternative. Benefit from our global coverage, excellent support, and flexible APIs.. [Read more](https://telnyx.com/the-better-vonage-voice-api-alternative) * ### Voice API Essentials | Telnyx Help Center In this collection you will find helpful links that explain the mission control portal features and troubleshooting tips. [Read more](https://support.telnyx.com/en/collections/133140-voice-api-essentials) * ### General Voice API Help | Telnyx Help Center Get assistance with Telnyx's Voice API: UK TPS, Google Verified Calls, STIR/SHAKEN. [Read more](https://support.telnyx.com/en/collections/1513238-general-voice-api-help) * ### Configuring Call Control/TeXML Applications - Voice API | Telnyx Help Center This article describes the in-depth setup of Call Control / TeXML Applications on our Mission Control Portal. [Read more](https://support.telnyx.com/en/articles/4374050-configuring-call-control-texml-applications-voice-api) * ### TeXML and Telnyx Voice API compatibility | Telnyx Help Center Avoid combining TeXML and Call Control commands in the same application [Read more](https://support.telnyx.com/en/articles/8118086-texml-and-telnyx-voice-api-compatibility) * ### Telnyx Tech Specs | Telnyx Help Center Here you will find out key tech specs at Telnyx and what they mean for our service. [Read more](https://support.telnyx.com/en/articles/1130599-telnyx-tech-specs) * ### API Keys and How to Use Them | Telnyx Help Center In this article we will explain API keys and how to use them with both API v2 and API v1. [Read more](https://support.telnyx.com/en/articles/4305158-api-keys-and-how-to-use-them) * ### Streamline Call Control workflows with Telnyx Flow Create highly customizable Call Control workflows with Telnyx Flow. Automate call handling for efficient, reliable voice communication. [Read more](https://telnyx.com/use-cases/call-control-workflows) * ### Create Custom Call Flows with Telnyx Build custom call flows that connect you to the right customers at the right time with Telnyx Voice API. Start building call flows today. [Read more](https://telnyx.com/use-cases/custom-call-flows) [Start building](https://telnyx.com/sign-up)