Whether you're adding voice to your product, launching a contact center, or building a voice AI agent, Telnyx gives you the control and performance to move fast globally with low-cost pricing. Use our flexible Voice APIs to power customer calling, recording and real-time call flows.
Telnyx Voice API gives developers everything they need to build scalable, reliable and programmable voice infrastructure, including AI powered call flows.
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.
Convert voice to text in real-time with low-latency, high accuracy engines from Telnyx or Google and automatic speaker separation for clear multi-party transcripts.
Play dynamic, natural-sounding voices in 40+ languages and accents using synthesized speech.
Add voice agents to any call in minutes by chaining TTS, STT, and LLM logic via simple AI Gather and AI Assistant commands.
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.
Easily integrate calling into your web and mobile applications with the power of WebRTC. Our Voice SDKs are available for web, iOS, and Android.
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.
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.
UJET leveraged Telnyx’s TeXML Voice API and mobile WebRTC SDKs to launch compliant, high-quality voice services in Canada with features like call recording and real-time media streaming. With support from Telnyx’s global network and collaborative engineering, they scaled reliable contact center experiences worldwide.
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.
The following endpoints can be used with the Voice API applications.
Our Voice products make it possible for you to programmatically manage calls, manage outbound voice traffic, and send/receive faxes.
Retrieve a phone number with voice settings
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.
What is a voice API? Our comprehensive guide to programmable voice for developers breaks down cost, use cases, and incredible voice API features.
The Telnyx voice API allows customers to connect and control calls programmatically, all over the globe.
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.
A developer in Turkey leveraged Telnyx and OpenAI to call thousands of pharmacies to find medication during a shortage.
Compare ChatGPT Voice API and Telnyx Voice API to find the best option for business communications. Explore features, pricing, and real-time AI capabilities.
Telnyx vs Twilio: See which voice API gives you lower latency, better pricing, and full-stack control for global communications.
Learn what your organization needs to build innovative voice solutions that will meet the demands of modern businesses and consumers.
Join VP of Business Development Mclain Roth as he walks through the setup steps to get started using Telnyx Voice API (Call Control).
Learn how voice AI is changing customer communication, improving efficiency, and reducing costs.
Build and launch powerful Voice AI Agents faster and cheaper with Telnyx. Ultra-low latency, unmatched call quality, total control.
Switch to Telnyx for a better Twilio alternative. Benefit from our competitive pricing, private global network, and award-winning support.
Switch to Telnyx for a better Vonage voice alternative. Benefit from our global coverage, excellent support, and flexible APIs..
In this collection you will find helpful links that explain the mission control portal features and troubleshooting tips.
Get assistance with Telnyx's Voice API: UK TPS, Google Verified Calls, STIR/SHAKEN.
This article describes the in-depth setup of Call Control / TeXML Applications on our Mission Control Portal.
Avoid combining TeXML and Call Control commands in the same application
Here you will find out key tech specs at Telnyx and what they mean for our service.
In this article we will explain API keys and how to use them with both API v2 and API v1.
Create highly customizable Call Control workflows with Telnyx Flow. Automate call handling for efficient, reliable voice communication.
Build custom call flows that connect you to the right customers at the right time with Telnyx Voice API. Start building call flows today.
