---
title: "Twilio"
description: "66 posts about Twilio, summarised, each linking to the original."
---

# Twilio
> 66 posts about Twilio, summarised, each linking to the original.

## Articles

### [Scaling Beyond Borders: The 2026 Communication Blueprint for Chinese Brands](https://yomu.fyi/post/scaling-beyond-borders-the-2026-communication-blueprint-for-chinese-br.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Author: Patricia Tham
- Published: Sep 28, 2026
- Type: Problem & solution

Chinese enterprises expanding overseas face fragmented communication channels, strict compliance regimes, and data residency mandates across 180+ markets. A programmable communication platform (CPaaS) eliminates the need to negotiate carrier-by-carrier in every country. Twilio’s global infrastructure — 335,000+ customers, 218+ voice-capable countries, and a 99.95% API SLA — provides a single integration point for SMS, voice, email, WhatsApp, and RCS worldwide. The platform comprises five layers: programmable messaging, voice APIs, SendGrid email, Twilio Verify, and Twilio Segment. Compliance features such as 3-region data residency and email authentication help brands navigate GDPR, TCPA, and other regulations.


### [How to Build an RCS Business Messaging Campaign with Twilio](https://yomu.fyi/post/how-to-build-an-rcs-business-messaging-campaign-with-twilio.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Author: Dhruv Patel
- Published: Sep 28, 2026
- Type: Tutorial

Rich Communication Services (RCS) upgrades SMS with branded conversations, images, carousels, and read receipts delivered through the default messaging app. Twilio Programmable Messaging supports RCS as a first-class channel, reusing the same API as SMS. This tutorial covers building an RCS campaign in Node.js, including RCS Sender registration (a manual review process with test device support), creating a twilio/card content template with dynamic variables, and broadcasting personalized messages from a JSON list. Delivery status is tracked through a status callback webhook exposed via ngrok, and replies are captured through an inbound webhook when users tap suggested reply buttons. The guide also includes troubleshooting for common issues such as messages falling back to SMS, error codes 30001 and 63001, and webhook configuration errors.


### [How to Build an RCS Business Messaging Campaign with Twilio in PHP](https://yomu.fyi/post/how-to-build-an-rcs-business-messaging-campaign-with-twilio-in-php.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Author: Dhruv Patel, Matthew Setter
- Published: Sep 28, 2026
- Type: Tutorial

Twilio’s tutorial explains how to build an RCS Business Messaging campaign in PHP, reusing the same Programmable Messaging API used for SMS. RCS turns standard text messages into branded conversations with images, carousels, verified sender logos, suggested replies, and read receipts delivered through the recipient’s default messaging app. The walkthrough covers registering an RCS Sender, attaching it to a Messaging Service, and designing a rich card template in the Twilio Content Template Builder. It then shows how to broadcast the campaign to a recipient list, track delivery status via a status callback webhook, and capture replies through an inbound webhook. Troubleshooting guidance addresses common issues such as messages falling back to SMS, senders pending approval, and missing status callbacks.


### [Building Localised, Enterprise-Grade AI Voice Agents](https://yomu.fyi/post/building-localised-enterprise-grade-ai-voice-agents.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Author: Michelle Duke
- Published: Sep 28, 2026
- Type: Explainer

Building enterprise-grade AI voice agents in production demands managing real-time latency, telecommunication networks, regional accents, compliance frameworks, and unpredictable customer behaviour—issues that standard text-based LLM benchmarks do not capture. The recommended approach combines Microsoft Azure for hyperscale infrastructure, Twilio for global communications, and WIZ.AI for localisation, so engineering teams avoid building low-level infrastructure and focus on unique business value. Field data from WIZ.AI across Asia reveals an ideal conversational response window of 500–800 ms, with a P90 latency under 2.0 s currently acceptable, and real-time code-switching support for languages like Singlish and Hinglish. Success metrics shift from pilot capability to commercial production benchmarks such as connection rate, recognition and tagging accuracy, and measurable business outcomes like Promise-to-Pay conversion. Engineering practices to maintain code quality include cross-model code reviews and strict pull-request line-count guardrails enforced by pre-commit hooks.


### [How to handle real-time interruptions in your AI voice agent](https://yomu.fyi/post/how-to-handle-real-time-interruptions-in-your-ai-voice-agent.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Author: Jesse Sumrak
- Published: Sep 25, 2026
- Type: Tutorial

Real-world AI voice agent calls are messy, with background noise, overlapping speech, and callers interrupting mid-sentence. Twilio Conversation Relay handles interruptions through attributes like interruptible, which controls whether caller input stops the agent’s speech, and ignoreBackchannel, which filters out short backchannel phrases. Background noise that sounds like speech can cause false interruptions and garbled transcripts; Twilio’s testing found Deepgram Flux produced zero transcription failures under combined noise, while a tuned Nova-3 setup also succeeded. Turn detection uses either a traditional silence timer or Deepgram Flux’s fused model, which reduces false interruptions by roughly 30% and trims response latency. When a caller interrupts, the app receives an interrupt message with the exact text played before cutoff, allowing it to trim the LLM’s conversation history so the model only remembers what the caller heard.


### [How to Build an RCS Business Messaging Campaign with Twilio in C#](https://yomu.fyi/post/how-to-build-an-rcs-business-messaging-campaign-with-twilio-in-c.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Author: Amanda Lange, Dhruv Patel
- Published: Sep 25, 2026
- Type: Tutorial

RCS Business Messaging upgrades SMS with branded conversations featuring images, suggested replies, and read receipts delivered natively on the recipient’s phone. Twilio Programmable Messaging supports RCS via the same API used for SMS, allowing reuse of existing integrations. This tutorial teaches building an RCS campaign in .NET 10, requiring a Twilio account, registered RCS Sender, Messaging Service, ngrok, and a code editor. The process includes creating a rich card template with hero image, dynamic placeholders, and three buttons (Shop the sale, Send promo code, Unsubscribe), then broadcasting personalized messages via the Twilio helper library while capturing status and replies through webhooks exposed by ngrok. Test devices receive messages without waiting for full RCS sender approval, and the server terminal outputs inbound replies and status callbacks in real time.


### [The #1 AI behavior hurting your customers’ experiences](https://yomu.fyi/post/the-1-ai-behavior-hurting-your-customers-experiences.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Author: Jesse Sumrak
- Published: Sep 25, 2026
- Type: Explainer

91% of brands report a drop in customer satisfaction from AI, and the top behavior causing this is losing context when customers change channels, cited by 40% of businesses. Three of the four main behaviors are context-related, with lack of empathy at 39%, inability to handle exceptions at 38%, and failing to understand at 36%. The infrastructure problem includes session boundaries, identity mismatches, channel-specific tooling, and batch timing that prevent context from following the customer, causing 74% of consumers to repeat themselves and 71% to abandon conversations. Twilio’s structural solutions—Conversations, Conversation Memory, and Conversation Orchestrator—attach context to the customer rather than the session and recommend starting with the chat-to-voice transition. To measure improvement, track repeat-explanation rate after a channel change, recognition rate, and abandonment at transition points.


### [How to Test and Fix Voice AI Agent Prompts with Twilio Conversation Relay and Cekura](https://yomu.fyi/post/how-to-test-and-fix-voice-ai-agent-prompts-with-twilio-conversation-re.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Author: Paul Kamp
- Published: Sep 24, 2026
- Type: Tutorial

This tutorial demonstrates building a voice AI agent with Twilio Conversation Relay, Node.js, and the OpenAI API, then testing and fixing its prompts using Cekura automated platform, a Twilio Startup Searchlight award winner. Conversation Relay manages real-time voice tasks like speech-to-text, text-to-speech, interruption detection, and turn management over WebSockets, while developers control business logic, tools, and AI integration. Cekura defines evaluation metrics, generates test conversations with realistic caller scenarios—interruptions, topic changes, and unexpected requests—and runs baseline tests to uncover prompt gaps. After analyzing failure reports, developers update the system prompt and re-run tests; fixing a fee-waiver bug raised the pass rate from below 70% to the 90-95% target in one refinement. The tutorial emphasizes that prompts are source code requiring version control and automated testing for reliable voice AI agent behavior.


### [Collected, stored, and useless: The lifecycle of most customer data](https://yomu.fyi/post/collected-stored-and-useless-the-lifecycle-of-most-customer-data.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Author: Jesse Sumrak
- Published: Sep 23, 2026
- Type: Problem & solution

The post examines the typical lifecycle of customer data in companies, revealing that most data is captured but never effectively used. A survey of 660 business leaders found that 48% struggle to connect customer data across channels, making it the top obstacle over budget or headcount. Data is often captured in volume but siloed across systems, duplicated into separate records for the same customer, and reliant on stale overnight batch updates. This leads to AI agents working with outdated profiles, causing 71% of consumers to abandon conversations when the AI fails to recognize them. The post proposes shortening the path between capture and use through real-time data synchronization, exemplified by Twilio’s Conversations and Conversation Memory products.


### [Sending SMS with an Agentic AI using Twilio and Hermes Agent](https://yomu.fyi/post/sending-sms-with-an-agentic-ai-using-twilio-and-hermes-agent.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Author: Amanda Lange
- Published: Sep 21, 2026
- Type: Tutorial

The author, a Twilio employee, built a personal agentic AI using Hermes Agent and connected it to Twilio SMS to enable phone-based interaction. They chose SMS over a custom Android app because it works out of the box on any phone and globally, making the agent accessible to anyone with the phone number, including non-technical users. The author wired up a toll-free 800 number and tested the setup by sending a text message from a grocery store parking lot, receiving a reply from the agent. The experiment demonstrated that agentic AI can be integrated with legacy protocols like SMS to provide realtime chat capabilities. The author also noted the importance of reading email provider terms of service if creating a new account for the agent.


### [More data won't make your AI smarter (here's what will)](https://yomu.fyi/post/more-data-won-t-make-your-ai-smarter-here-s-what-will.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Author: Jesse Sumrak
- Published: Sep 21, 2026
- Type: Problem & solution

Twilio research found that 99% of companies report something blocks them from understanding customers, with 48% citing connecting data across channels as the top obstacle. The problem isn’t data collection, which has succeeded, but the missing data activation layer that makes context usable in the eight seconds an AI agent has before a customer gives up. Twilio’s solution involves three elements: continuity across channels, real-time profile freshness, and retrieval of relevant history mid-conversation. Twilio Conversations treats touchpoints as a single lifecycle, Conversation Memory syncs new details in real time, and Conversation Intelligence surfaces approved documents alongside history. Twilio recommends starting small by picking one handoff where customers repeat themselves and making context survive it, rather than feeding the AI more data.


### [Automating Twilio Auth Token Detection and Rotation with TruffleHog, Tines, and Slack](https://yomu.fyi/post/automating-twilio-auth-token-detection-and-rotation-with-trufflehog-ti.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Author: Matt Coser
- Published: Sep 21, 2026
- Type: Tutorial

Hardcoding Twilio Auth Tokens in source code or exposing them in plaintext leaves communication systems vulnerable to account takeover, toll fraud, and unauthorized exploitation. This tutorial presents an automated detection and rotation pipeline using TruffleHog for secret scanning, Tines for security workflow automation, and Slack for user interaction. TruffleHog scans local directories or remote Git repositories for Twilio secrets, performs live verification via API requests, and outputs results in JSON. Tines ingests detection events through a webhook, parses the results, and triggers a Slack notification with interactive buttons for acknowledgment, scheduling remediation, or immediate rotation. Upon rotation, Tines calls the Twilio Account API to generate a new secondary auth token, displays it in a Slack modal for secure copy, and eventually promotes it to primary, while the old token is revoked.


### [Twilio’s 2026 Heightened Awareness Period: Ensuring Reliable Messaging for Peak Season](https://yomu.fyi/post/twilio-s-2026-heightened-awareness-period-ensuring-reliable-messaging.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Published: Sep 17, 2026
- Type: Announcement

Twilio has scheduled two 2026 Heightened Awareness Periods (HAPs) to manage messaging throughput during U.S. midterm election traffic and the Black Friday/Cyber Monday and holiday shopping surge. During these windows, high-volume short code and toll-free traffic shifts temporarily to Market Throughput, while 10DLC remains on Account-Based Throughput and RCS uses standard per-sender limits; contracted limits are honored. Most users need no action, but election senders should contact their account team by October 1, 2026, and holiday senders face deadlines for RCS approval, throughput review, A2P 10DLC requests, and supplementary orders. The election HAP runs November 2–4, 2026, while the holiday HAP runs November 19, 2026, through January 4, 2027; capacity is limited and allocated first come, first served.


### [On-Demand Masked Sessions with Twilio Proxy, Voice and Serverless](https://yomu.fyi/post/on-demand-masked-sessions-with-twilio-proxy-voice-and-serverless.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Author: Leroy Chan
- Published: Sep 16, 2026
- Type: Tutorial

This tutorial presents a Just-in-Time (JIT) masked session workflow for securely connecting callers when phone numbers cannot be pre-associated because of inventory constraints. The design routes an inbound call to a reserved Twilio number through Twilio Voice, uses an IVR to collect a six-digit tracking code, and dynamically creates a private Twilio Proxy session. It uses five serverless endpoints plus helper functions; because the Out-of-Session Callback lacks keypad digits, a “2-Bounce” flow uses a redirect and a temporary Twilio Sync Document keyed by res- plus CallSid to carry the resolved destination, with a short TTL such as 900 seconds. On the second bounce, the destination is retrieved and deleted, and Proxy receives instructions to auto-create the session and bridge the caller. The result is an on-demand masked connection across standard cellular connections that avoids static phone-number preallocation and preserves the number pool.


### [What is CIAM in 2026 and why does it matter?](https://yomu.fyi/post/what-is-ciam-in-2026-and-why-does-it-matter.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Author: Ravleen Kaur
- Published: Sep 15, 2026
- Type: Explainer

CIAM has expanded beyond password storage and login-time credential checks as digital experiences include autonomous AI agents and attacks make point-in-time verification less reliable. Modern customer identity is presented as a continuous trust and control layer across web, mobile, messaging, voice, email, and AI interactions, balancing low friction with adaptive risk detection. The architecture separates an identity authority, which owns identity, federation, and authorization, from a trust orchestration layer that evaluates live signals, triggers step-up verification, adapts to mid-session risk, and records decisions. It also must define delegated authority for agents, human approval boundaries, multi-signal decisioning, explainability, consent, and identity resolution. Twilio is described as an adjacent execution layer providing Verify, Lookup, carrier intelligence, device fingerprinting, and passwordless or one-time passcode flows for high-risk moments.


### [How to Orchestrate Multi-Call Conversations with an LLM and Twilio Conversation Memory in Python](https://yomu.fyi/post/how-to-orchestrate-multi-call-conversations-with-an-llm-and-twilio-con-python.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Author: Amanda Lange, Dylan Frankcom
- Published: Sep 14, 2026
- Type: Tutorial

The tutorial builds a Python FastAPI voice service that preserves caller context, preferences, and action history across separate inbound calls using Twilio Conversation Memory. It connects a Twilio phone number to a /voice webhook and /ws WebSocket through Conversation Relay, then uses an asynchronous OpenAI client with gpt-4o-mini to generate streamed responses. A memory service retrieves stored information by caller number, while each completed call is summarized and written back to the configured memory store. The example uses an auto-repair assistant whose system prompt incorporates prior context before the next call, and the test procedure checks that a second call recalls details from the first. The setup requires Python 3.11 or later, Twilio and OpenAI credentials, a memory-store and configuration ID, and ngrok for exposing local webhooks.


### [How to Connect Your Twilio Agent to External APIs in Node.js](https://yomu.fyi/post/how-to-connect-your-twilio-agent-to-external-apis-in-node-js.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Author: Dhruv Patel, Amanda Lange
- Published: Sep 14, 2026
- Type: Tutorial

Voice agents can converse, but they need external APIs to retrieve live information or take actions such as checking inventory or booking appointments. This tutorial builds a Node.js voice agent with Twilio Conversation Relay, Express, WebSockets, and the OpenAI Node.js SDK. A Conversation Relay WebSocket handler collects voice prompts, maintains conversation messages, streams model output back to the call, and defines a get\_cat\_fact tool that fetches JSON from the unauthenticated Cat Facts REST API. The service returns the fetched fact or an error message, while TwiML connects Twilio's voice-capable number to the WebSocket endpoint. Testing uses Node.js 18+, an OpenAI API key, ngrok, and a POST /voice webhook; the stated result is that callers can ask for a cat fact and hear the API response.


### [How to Orchestrate Multi-Call Conversations with an LLM and Twilio Conversation in Node.js Memory](https://yomu.fyi/post/how-to-orchestrate-multi-call-conversations-with-an-llm-and-twilio-con-nodejs.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Author: Amanda Lange, Dhruv Patel
- Published: Sep 14, 2026
- Type: Tutorial

Disconnected voice calls can force callers to repeat information, creating friction for AI phone agents. It builds a Node.js Express service that preserves caller context, preferences, and action history across separate inbound calls using Twilio Conversation Memory. The implementation uses Express and express-ws for HTTP and WebSocket handling, the OpenAI SDK with gpt-4o-mini for streamed responses and summaries, and axios for Twilio’s Conversation Memory REST API; a memory store ID and other credentials are configured through environment variables. The sample application connects Twilio’s Conversation Relay to an auto-repair assistant, retrieves prior context for recognized callers, and logs a summary when a call ends. Testing involves two calls from the same phone number to verify that the second call recalls details from the first.


### [How to Connect Your Twilio Agent to External APIs in Python](https://yomu.fyi/post/how-to-connect-your-twilio-agent-to-external-apis-in-python.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Author: Amanda Lange, Dylan Frankcom
- Published: Sep 12, 2026
- Type: Tutorial

Voice agents can converse, but need external APIs to retrieve live data or take actions such as checking inventory and booking appointments. This tutorial builds a Python and FastAPI voice agent with Twilio Conversation Relay, OpenAI tool calling, and an unauthenticated Cat Facts REST API. A FastAPI webhook returns TwiML that connects callers to a websocket, while Conversation Relay messages are converted into conversation history and streamed responses. When the model requests a cat fact, the application executes the tool, sends its result back to OpenAI, and streams the follow-up answer to the caller. The setup uses environment variables for the OpenAI key, httpx for asynchronous external requests, and ngrok to expose local webhooks; the completed test lets a caller ask for and receive a cat fact.


### [How to Connect Your Twilio Agent to External APIs with PHP](https://yomu.fyi/post/how-to-connect-your-twilio-agent-to-external-apis-with-php.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Author: Amanda Lange, Matthew Setter
- Published: Sep 11, 2026
- Type: Tutorial

The tutorial shows how to connect a Twilio voice agent to external REST APIs so an LLM-driven conversation can retrieve live information or support actions such as checking inventory or booking appointments. It builds the example in PHP 8.5 or later with OpenSwoole, Twilio Conversation Relay, OpenAI, and a WebSocket server, using Cat Facts as an unauthenticated API. The application exposes a POST /voice webhook that returns TwiML and connects Conversation Relay to a wss /ws endpoint, while session handling passes caller prompts into the OpenAI service. Tool calling routes the request to the Cat Facts endpoint, parses the JSON fact field, and returns either the fact, “No fact returned.”, or an error when the API response is unsuccessful or unavailable. Testing requires running php server.php, exposing port 8080 with ngrok, and configuring the Twilio number’s incoming webhook to /voice; the conclusion says external HTTP endpoints give agents real-time data.


[Newer posts](https://yomu.fyi/topic/twilio.md) · [Older posts](https://yomu.fyi/topic/twilio/page/3.md)