Blog
Code-first technical deep dives into real-time Voice AI, call monitoring, and AI communications infrastructure. Every post ships with a working code example.
How to Build an Edge Cache Invalidation Agent with the Telnyx Agent SDK
When you run a content-heavy application across multiple edge locations, cache invalidation becomes a critical operational concern. A CMS publishes a new pag...
Voice AIHow to Build an Audio Transcription → AI Summary → SMS Pipeline with the Telnyx Agent SDK
Voicemails pile up. You get one after a missed call, listen to it once, and then it sits in your inbox. If you need the details later, you have to listen aga...
Voice AIRun LangGraph Inside a Telnyx Edge Actor with Zero-Credential Inference
LangGraph is a powerful framework for building stateful, multi-step LLM agents. But running it on edge infrastructure usually means managing API keys inside ...
Voice AIBuild a Scheduled Reminder Agent on Telnyx Edge Compute
Reminders sound simple until you try to make them behave like a real product.
Voice AIBuild a Telnyx Agent That Can Send SMS and Place Calls with LLM Tool Calling
The most useful communications agents do more than answer questions. They take action.
Voice AIBuild an Adaptive SMS Quiz Agent with Telnyx Edge Compute
SMS is a good channel for small learning workflows because the interaction is simple: send a prompt, wait for a reply, continue from the last turn.
Voice AIBuild a Real-Time SMS Sentiment Agent on Telnyx Edge Compute
Support teams do not only need to know that a customer texted them. They need to know when a conversation is getting urgent.
Voice AIBuild an SMS Triage Bot with Durable Agent State
Support inboxes get messy fast.
Voice AIBuild a Voice Agent That Actually Holds the Call
The first time you get an AI agent to answer a phone call, it feels magical.
Voice AIBuild an SMS Support Agent That Actually Follows Up
Most support bots can answer a message.
Voice AIAI Voice Agent with Function Calling — Calling External APIs Mid-Conversation in Python
You have an AI voice agent. It picks up calls. It greets callers. It responds in natural language.
Voice AIBrowser Phone Calls with Real-Time AI Coaching — 75 Lines of Python
You are on a sales call. You are pitching, handling objections, trying to close. You have no idea if you are talking too fast, missing buying signals, or fai...
Voice AIFrom Phone Call to Formatted Email in 80 Lines of Python — AI Voice Memo Cleanup with Telnyx
Voice memos are the fastest way to capture a thought — you speak, you're done. But what you get is a rambling audio blob that nobody (including you) wants to...
Voice AILearn a Language With Voice Flashcards on Telnyx — TTS Speaks, You Repeat, AI Scores
Language learning apps work fine on a screen, but the hardest part of picking up a new language is the thing screens avoid: actually speaking out loud, in re...
Voice AIBuild a Voice Agent That Switches Languages Mid-Call on Telnyx
Translation apps interpret between two people speaking different languages. Code-switching is different: one caller switches languages mid-conversation and t...
Voice AILearn a Language With Voice Flashcards on Telnyx — TTS Speaks, You Repeat, AI Scores
Language learning apps work fine on a screen, but the hardest part of picking up a new language is the thing screens avoid: actually speaking out loud, in re...
Voice AITry Every Telnyx Ultra Voice in One Scene
Telnyx ships over 700 Ultra voices across 36 languages with sub-100ms time-to-first-byte. The problem is not the voices — it is hearing them. The docs list t...
Voice AIStop Guessing Which Prompt Is Better. Test It at the Edge.
Every AI feature eventually gets to the same awkward moment.
Voice AIBuild an Edge Crop Advisory API with Telnyx AI Inference
Some of the most useful AI applications do not start with a chatbot.
Voice AIBuild an Edge URL Summarizer with Telnyx Stateful Actors
Some AI features start as a button.
Voice AIRoute Phone Calls by Geography at the Carrier Edge — One Number, Three Regions, Three Compliant Experiences
A single phone number can ring from anywhere. A US toll-free number might receive calls from New York, São Paulo, London, and Berlin in the same hour. Tradit...
Voice AIBuild a Real-Time AI Translation Bridge for Phone Calls — 141 Lines of Python
A US business needs to talk to a supplier in Mexico. The operations manager speaks English. The supplier speaks Spanish. Today, they use a human interpreter ...
Voice AIBuild a Website AI Assistant That Can Control the Page with Client-Side Tools
Most AI assistant demos treat the website as a place to show a chat bubble. The assistant answers questions, maybe calls a backend webhook, and the page itse...
Voice AIBuild a Voice Assistant for HIPAA-Compliant Lab Results Notifications with Telnyx
Lab result notification is a useful healthcare voice AI workflow because the call pattern is predictable, privacy-sensitive, and operationally expensive.
Voice AIBuild an AI PCI Protected Payment Collection Voice Assistant with Telnyx
Collecting payments over the phone is one of the places where a voice AI demo can go wrong fast.
Voice AIBuild an AI Voicemail Smart Router with Telnyx
Voicemail is easy to ignore.
Voice AIBuild an AI Call Recording Redactor with Telnyx
Call recordings are useful until they become a privacy problem.
Voice AIBuild an AI Quiz Generator with Telnyx AI Inference
One of the most useful things you can do with an LLM is turn existing content into something interactive.
Voice AIBuild an AI Video Dubbing Pipeline with STT, LLM, and TTS on One Network
Imagine uploading a podcast clip in English and getting back the same conversation dubbed in Spanish — same speakers, same pacing, same tone, but in a differ...
Voice AIScreen Every Inbound Call at the Carrier Edge: A Fraud Firewall in 178 Lines of Python
Block spam, scam, and robocalls before they reach your app — using Telnyx Number Lookup, AI Inference, and Call Control in a single Flask webhook server.
Voice AIBuild an AI Pre-Visit Clearance Voice Agent with Telnyx
Patients often call before a visit to ask whether a procedure, test, or medication needs insurance clearance. That request is administrative, but it still cr...
Voice AIBuild an AI Moderation Classifier with Telnyx AI Inference
Moderation is one of those features that sounds simple until you try to build it for a real product.
Voice AIBuild an AI Adventure Game with Telnyx AI Inference
Most AI demos start with a prompt.
Voice AIBuild an AI Prescription Refill Intake Voice Assistant with Telnyx
Prescription refill calls are a practical healthcare voice AI use case because the workflow is repetitive, time-sensitive, and structured. A caller usually n...
Voice AITurn a Text Chatbot Into a Voice Bot With Telnyx Conversation Relay
Call a phone number and talk to your existing AI chatbot — the same one that already answers your Telegram, Slack, or web messages. Telnyx Conversation Relay...
Voice AIEliminate Dead Air in AI Voice Assistants with Filler Messages — Telnyx AI Assistant Webhook Demo
When an AI voice assistant calls a sync webhook tool — to look up an order, query a database, check inventory — the caller hears silence. Five seconds of dea...
Voice AIBuild AI Assistant Multiparticipant Calling with Telnyx Voice AI
Most voice AI demos are one-to-one: a caller talks to an AI assistant, the AI answers, and the call ends. Real support, healthcare, financial services, and s...
Voice AIBuild Semantic Search for Support Tickets with Telnyx AI Inference
Search usually starts simple.
Voice AIYour AI Assistant Needs a Backend. Put It at the Edge
Building a voice AI assistant has never been easier. You write a prompt, connect a phone number, pick a model, and within minutes your assistant is answering...
Voice AIPractice Negotiations with an AI Phone Agent — Real-Time Roleplay with Telnyx Voice AI
Imagine picking up your phone, dialing a number, and practicing a salary negotiation against an AI that plays the hiring manager — one that pushes back on yo...
Voice AIBuild an AI Price Quote Phone Agent — Real-Time Custom Quotes with Telnyx Voice AI
Call a number, describe what you need, and get an AI-generated price quote with line items and monthly total in real time. 102 lines of Python.
Voice AIBuild a Natural Language to SQL API with Telnyx AI Inference
SQL is powerful, but it is not always the interface people want to use.
Voice AIBuild an AI Phone Story Hotline — Interactive Storytelling with Telnyx Voice AI
Call a number, choose a genre, and listen to an AI-generated interactive story where your choices shape the narrative. 104 lines of Python.
Voice AIBuild an AI Audio Translator with STT + Translate + TTS on Telnyx
Localizing a podcast, translating a recorded meeting, or dubbing a lecture used to require three different services. The Telnyx AI Inference API exposes STT,...
Voice AIBuild a Non-Manipulative AI Subscription Cancel-Save Agent with Telnyx
Subscription cancel-save flows are easy to over-engineer into manipulative dark patterns, and easy to under-engineer into "your subscription has been cancell...
Voice AIBuild a Hotel Guest Services Line with Telnyx Voice and SMS
Hotels lose guest satisfaction when the front desk is busy, off-shift, or stuck on the phone. A concierge voice and SMS line gives guests one number to call ...
Voice AIBuild an AI Error Explainer with Telnyx AI Inference
Every developer has seen an error message that looks obvious only after the fix is already known.
Voice AIDeploy an MCP Server to Edge Compute: Expose Telnyx APIs as Tools for AI Agents
The Model Context Protocol (MCP) has become the standard way for AI agents to call external tools. Claude, Cursor, and a growing ecosystem of agent framework...
Voice AIBuild an AI Language Learning Phone Tutor with Telnyx Voice AI and AI Inference
Language learning apps work fine on a screen, but the hardest part of picking up a new language is the thing screens avoid: actually speaking out loud, in re...
Voice AII Replaced My Voicemail With an AI That Texts Me Summaries (in 118 Lines of Python)
Every voicemail system does the same thing: record audio, hope the recipient checks it. Most never do. Here's how I built a voicemail that calls an LLM, clas...
Voice AIHow to Build an AI Hiring Phone Screen with Telnyx Voice
The first-round phone screen is the most repetitive part of hiring. A recruiter calls a candidate, asks the same five questions, takes notes, and decides whe...
Voice AIHow to Build an AI RSVP Phone Line with Telnyx Voice
Every event I have ever organized has the same problem. I send the invites. People say "I'll RSVP later." They don't. Then I spend three days chasing them on...
Voice AIBuild an AI Changelog Generator with Telnyx AI Inference
Most developers have written a changelog by staring at a wall of commit messages and trying to remember what actually mattered.
Voice AIBuild a CDR Usage Analytics Dashboard with Telnyx AI Inference
Call Detail Records are one of those data sources that quietly explain a lot about a communications product.
Voice AIExtract Structured Data from Faxes with Telnyx AI Inference
Fax is not the first workflow most developers want to modernize.
Voice AIBuild an AI Audiobook Narrator with Telnyx AI Inference, TTS, and Cloud Storage
Turning a manuscript into a narrated audiobook traditionally means hiring a voice actor, booking studio time, and accepting that revisions cost hours of re-r...
Voice AIHow to Build a Real-Time Phone Call Transcription Pipeline with Telnyx and OpenAI Whisper
This example wires up the smallest useful phone-call-to-AI-response pipeline:
Voice AIHow to Build an AI Chat Endpoint in Node.js with the Telnyx AI Assistants API
Most "add an AI assistant to my app" tutorials stop at the demo. They show you how to call an LLM and print the response, then leave the production plumbing ...
Voice AILook Up Phone Number Carrier and Line Type with Python and the Telnyx Number Lookup API
Every communications workflow has a question it needs answered before the first message or call goes out: what kind of number is this? Is it a mobile phone, ...
Voice AIBuild a Voice-Controlled IoT Command Line with Telnyx
Voice AI demos often stop at conversation. A caller asks a question, an assistant replies, and nothing visible changes.
Voice AIMonitor Number Reputation with Telnyx AI Inference
Outbound communication only works when the numbers behind it stay healthy.
Voice AIBuild a Web Chatbot with a Telnyx AI Assistant
A useful AI assistant demo does not always need a phone call. Sometimes the fastest way to show the value of a Portal-managed assistant is a simple web chat:...
Voice AIEnrich Leads with Number Lookup and AI Inference
A phone number can tell you more than whether a lead typed ten valid digits into a form.
Voice AIBuild an AI Restaurant Reservation Voice Agent with Telnyx
Restaurants lose bookings when callers hit voicemail, wait on hold, or call outside staffed hours. A voice ai reservation agent gives developers a practical ...
Voice AIPredict Churn Before Customers Leave
Customer churn rarely comes out of nowhere.
Voice AISend OTP Codes Over WhatsApp With the Telnyx Verify API
WhatsApp has more than two billion active users worldwide, making it the most popular messaging platform on the planet. For businesses that rely on one-time ...
Voice AIBuild an SMS Auto-Reply Bot With the Telnyx Messaging API
Every business gets text messages outside of office hours. Customers ask about pricing, request support, or just want to know when you're open. Without an au...
Voice AIRoute Phone Calls to an AI Agent With the Telnyx Voice API
Voice AI agents are transforming customer service, sales, and support. But before an AI can talk to a caller, you need the voice infrastructure layer — a way...
Voice AIHow to Build a RAG Application with Telnyx AI Inference
A generic chatbot can answer anything. That is also the problem.
Voice AIBuild Conversational Workflows with Telnyx Voice AI for Insurance Claims Intake
When customers call support, there are moments where they are not actively talking to the agent. In an intake workflow, silence, menu trees, and clarificatio...
Voice AIHow to Build an AI Audio Translator with Telnyx STT, Inference, and TTS
Audio content is hard to localize manually. A podcast clip, customer interview, lecture, meeting recording, or product walkthrough has to be transcribed, tra...
Voice AIHow to Build an Outbound Hold Agent with Telnyx Voice
The first version of an outbound voice agent seems simple: call a company, listen to the IVR, press the right menu option, and talk to a representative.
Voice AIBuild Provisional Voice API Agents with Telnyx
Provisional agents are a pattern for using one reusable AI assistant configuration across many runtime contexts. Instead of creating a separate assistant for...
Voice AIHow to Extract Structured JSON from Messy Text with Telnyx AI Inference
Every operations team has a pile of text that is useful but hard to automate: support tickets, inbound emails, incident notes, sales leads, account updates, ...
Voice AIHow to Build a Warm Transfer System with Node.js and the Telnyx Voice API
A warm transfer is the difference between a customer feeling handed off and a customer feeling taken care of. When a support agent says "let me connect you w...