---
title: "Twilio"
description: "Cloud communications platform providing APIs and services for messaging, voice, email, authentication, and customer engagement."
---

# Twilio
> Cloud communications platform providing APIs and services for messaging, voice, email, authentication, and customer engagement.

## Articles

### [The 2026 CDP Shift: Why AI Agents Are Only as Smart as Your Data Infrastructure](https://yomu.fyi/post/the-2026-cdp-shift-why-ai-agents-are-only-as-smart-as-your-data-infras.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Author: Cynthia Goldsworthy
- Published: Sep 22, 2026
- Type: Problem & solution

The 2026 Customer Data Platform Report identifies a critical enterprise challenge: while AI tools grow individually smarter, fragmented customer data causes a worsening, not better, experience. The shift is from computational capacity to contextual continuity, as disconnected pipelines force AI agents to start every interaction from scratch. Three failures arise from fragmented systems: agent amnesia, escalating operational costs from wasted tokens, and trapped intelligence that never reaches active workflows. Modern CDPs have evolved from passive audience builders into API-first context engines that support three pillars: pre-execution context with working memory, unified behavioral and conversational data streams, and infrastructure-level governance enforcing compliance before data reaches AI models. Organizations like Twilio, Trustpilot, and Quartz demonstrate that embedding real-time customer context into the conversation layer outperforms deploying the smartest standalone models.


### [How to design an AI-to-human handoff that preserves context](https://yomu.fyi/post/how-to-design-an-ai-to-human-handoff-that-preserves-context.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Author: Jesse Sumrak
- Published: Sep 22, 2026
- Type: Problem & solution

AI-to-human handoffs often fail because context is lost during transfer, forcing customers to repeat themselves. 76% of consumers report that human agents have little to no context about their issue, and 91% of brands have seen customer satisfaction drop due to AI missteps, with 40% attributed to context loss between channels. A cold transfer drops the customer into a new queue with nothing carried over, while a warm transfer briefs the receiving agent beforehand. Five steps to preserve context include defining escalation triggers early, specifying a payload with conversation history and customer profile, generating a three-line summary, maintaining context across channel changes, and writing back learned information to customer records. Measuring repeat-explanation rate and post-handoff resolution rate helps identify whether handoffs are working or if the AI is over-holding conversations.


### [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.


### [How we AI-updated 1,138 Error-code Docs Pages](https://yomu.fyi/post/how-we-ai-updated-1-138-error-code-docs-pages.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Author: Maria Bermudez
- Published: Sep 17, 2026
- Type: Explainer

Twilio used AI to update 1,138 error-code documentation pages over about 12 weeks, with a human reviewing every change. The team first scored roughly 2,692 pages with a deterministic script covering structure, content, and resources, then routed low-scoring pages to an LLM pipeline while sending borderline pages to human review. That pipeline used OpenAI's gpt-5.4 via the Responses API, generated full-file responses, sanitized them, converted them into git apply patches, linted results, and rejected any page whose code snippet fingerprint changed. Small-batch pull requests, tracking files, local-modification checks, and named reviewers limited duplicate work and kept approval in the workflow. Across about 27 pull requests from March to May 2026, the process marked 1,138 error codes complete, while the team acknowledged that human review was the quality bar and that future scaling would benefit from an automated evaluation harness and diff-based generation.


### [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.


### [How to Orchestrate Multi-Call Conversations with an LLM and Twilio Conversation Memory](https://yomu.fyi/post/how-to-orchestrate-multi-call-conversations-with-an-llm-and-twilio-con-memory.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Author: Amanda Lange
- Published: Sep 15, 2026
- Type: Tutorial

The tutorial builds a C# .NET 9 ASP.NET Core voice service that preserves caller context, preferences, and action history across separate inbound calls. It combines Twilio Conversation Relay and a Twilio Conversation Memory Store with an OpenAI gpt-4o-mini service, using WebSockets to connect the call flow and stream generated text. The setup covers creating the project, installing Twilio, DotNetEnv, and OpenAI packages, configuring credentials and IDs in .env, exposing local webhooks with ngrok, and routing /voice to /ws. The sample assistant is framed as Owlbert's Auto Repair and is instructed to speak naturally, avoid lists and emojis, refer to caller details, and acknowledge uncertainty rather than guess. Testing uses two calls from the same number; the expected result is that the second call recalls first-call details and that Twilio shows a stored conversation summary.


### [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 Connect Your Twilio Agent to External APIs](https://yomu.fyi/post/how-to-connect-your-twilio-agent-to-external-apis.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Author: Amanda Lange
- Published: Sep 15, 2026
- Type: Tutorial

This tutorial shows how to connect a Twilio voice agent to an external REST API so it can retrieve live information during a conversation. It uses C# .NET 9, Twilio Conversation Relay, WebSockets, OpenAI tool calling, and the authentication-free Cat Facts API as a demonstration. An ASP.NET Core application exposes a /voice webhook, connects calls to a /ws endpoint, maintains conversation messages, streams model responses, and executes get\_cat\_fact by requesting and parsing JSON from the Cat Facts service. The guide also covers environment variables, NuGet dependencies, ngrok tunneling, Twilio number configuration, and troubleshooting for webhook URLs and API keys. After setup, callers can ask for a cat fact and receive one from the external service, illustrating how function tools can give voice agents real-time data and perform API-backed work.


### [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.


### [Italy's email open tracking pixels rules are changing](https://yomu.fyi/post/italy-s-email-open-tracking-pixels-rules-are-changing.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Author: Denis O'Sullivan
- Published: Sep 14, 2026
- Type: Explainer

Italy’s data protection authority, the Garante per la protezione dei dati personali, has issued guidelines governing tracking pixels in email communications. The guidance says recipients must be told about tracking pixels regardless of the email’s purpose or sender, and that prior consent is required for many uses. Senders must comply by October 28, 2026; existing subscribers who signed up before April 29, 2026 need an opt-out opportunity, while subscribers from April 29 onward require prior, explicit consent for open tracking pixels. The guidance also includes complexities, including exemptions for some email types and different rules for opaque pixels, so senders are advised to review opt-in processes with legal or privacy teams. The change follows France’s earlier rules and may foreshadow similar action elsewhere in Europe.


### [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.


### [How to Orchestrate Multi-Call Conversations with an LLM and Twilio Conversation Memory with PHP](https://yomu.fyi/post/how-to-orchestrate-multi-call-conversations-with-an-llm-and-twilio-con.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Author: Amanda Lange, Matthew Setter
- Published: Sep 11, 2026
- Type: Tutorial

This tutorial shows how to build a PHP voice agent that retains caller context, preferences, and action history across separate inbound calls. It uses Twilio Conversation Memory with a Memory Store, an Open Swoole service, Twilio ConversationRelay, and an OpenAI integration using gpt-4o-mini; the example models an auto-repair shop assistant. The OpenAI service appends supplied prior customer context to its system prompt, while streamed responses are sent through a WebSocket and environment variables provide API credentials and the Memory Store ID. After running the service on port 9501, exposing it with ngrok, and configuring the phone-number webhook, the tutorial tests two calls from the same number and says the second call should remember details from the first.


### [\[Webinar\] Elevating customer engagement with WhatsApp](https://yomu.fyi/post/webinar-elevating-customer-engagement-with-whatsapp.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Author: Twilio
- Published: Sep 11, 2026
- Type: Announcement

The webinar examines how businesses can use WhatsApp for secure account verification, one-time passcodes, operational alerts, and customer conversations. It presents notification overload, third-party portals, single-use apps, and unbranded sender numbers as reasons critical messages may be ignored, affecting deliveries and transactions. Speakers from Twilio, WhatsApp, and Orbio AI describe a verified, two-way model built around WhatsApp Utility messaging, interactive buttons, logic flows, end-to-end encryption, and visual drag-and-drop automation. Orbio AI's examples include screening candidates, scheduling interviews, reminders, onboarding, and engagement conversations for enterprise clients while the webinar claims improved deliverability, faster user action, reduced manual work, protection against SMS toll fraud, and scalable deployment. It also positions app-based delivery over WiFi and cellular networks as a more reliable alternative.


### [What Is SMS Pumping Fraud and How to Stop It](https://yomu.fyi/post/what-is-sms-pumping-fraud-and-how-to-stop-it.md)
- Company: [Twilio](https://yomu.fyi/company/twilio.md)
- Author: Twilio
- Published: Sep 10, 2026
- Type: Explainer

SMS pumping fraud, also called SMS toll fraud, uses bots and fake phone numbers to trigger automated text messages from public-facing endpoints, leaving businesses to pay for traffic that produces no genuine customers. The attack can target OTP requests, sign-up and lead forms, transactional notifications, marketing campaigns, and chatbot endpoints; it may appear as a sudden spike or as distributed low-volume traffic that accumulates over days or weeks. Suggested detection measures include monitoring traffic by use case and geography, reconciling spend with conversions, examining clustered phone-number patterns, and analyzing incomplete forms. The prevention guidance covers CAPTCHA, behavioral bot detection, rate limits, geographic controls, delayed OTP requests, alternative verification methods, and Twilio products including Verify Fraud Guard, SMS Pumping Protection, and Lookup SMS Pumping Risk Score.


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