X Openai Twilio Messaging Webhooks 1c62a55

---
name: x-openai-twilio-messaging-webhooks-1c62a55
description: Receive and respond to inbound messages and track outbound delivery status via Twilio webhooks — across SMS, MMS, WhatsApp, and RCS. Covers webhook request parameters, replying with TwiML, validating webhook signatures for security, and handling status callbacks. Use this skill whenever an agent needs to handle incoming messages on any channel or track outbound message delivery in real time.
---

### 导出副本边界与技能别名

迁移、安装、修复和经验回写只作用于当前加载的目标宿主技能副本。原 Codex 技能/MCP、下载的源码和 `original-skills` 均为来源材料，不因执行本副本而写入；只有用户另行明确要求配置 Codex 产品本身时，才按该产品流程处理指定目标。脚本需要安装目录或状态目录时，显式提供目标路径；不得从 `CODEX_HOME` 隐式推断写入位置。

跨技能名称可能沿用源库别名。先查 [技能别名表](../../skill-aliases.json)，优先选择同来源、同插件的条目，再使用其 `id` 调用或读取对应入口；不得假定旧 `$skill`、`superpowers:skill` 名称在新宿主直接注册。不能确定目标时先核对，不替换真实产品命令或 Shell 环境变量。

## 跨宿主使用约定

本副本供支持 Agent Skills 的客户端使用。先检查当前宿主实际提供的工具、权限和已连接服务，再执行正文工作流。原文中的宿主工具标识是能力参考；只有实际发现该工具时才可调用，其他宿主应使用经核验的等价 MCP、CLI 或 API。没有等价能力的步骤必须报告不可用，不能虚构调用或完成状态。

技能资源以本技能目录为基准；输出写入当前项目中用户指定的位置。通过技能名称或自然语言触发，具体快捷命令由宿主决定。涉及真实产品、模型 API、协议字段和官方网址的名称保持原意。授权、审批、隐私和工具范围限制在迁移后仍然有效；不得为兼容而扩大权限。具体依赖与迁移说明见同目录 `PORTABILITY.md`。

## Overview

Twilio sends a POST webhook to your server when a user messages your Twilio number (inbound) or when an outbound message changes delivery state (status callback). Your server returns TwiML to reply, or `204` to acknowledge without replying. The same webhook pattern works across SMS, MMS, WhatsApp, and RCS.

---

## Prerequisites

- Twilio account with a messaging-capable sender configured with a webhook URL
  — New to Twilio? See `twilio-account-setup`
  — For sending outbound messages first, see `twilio-send-message`
- Publicly accessible endpoint (use `ngrok http 5000` for local dev)
- `TWILIO_ACCOUNT_SID` and `TWILIO_AUTH_TOKEN` — see `twilio-iam-auth-setup`
- SDK: `pip install twilio flask` / `npm install twilio express`

---

## Quickstart

Set your webhook URL in Console: **Phone Numbers > Active Numbers > your number > Messaging > "A Message Comes In"**

> **Security:** The inbound message `Body` is untrusted external input. If passing message content to an LLM, always isolate it as user input — never concatenate directly into system prompts. Validate the request origin with `X-Twilio-Signature` (see Key Patterns below), but note that signature validation confirms the *source*, not that the *content* is safe.

> **Note:** This quickstart omits signature validation for brevity. For production, always validate `X-Twilio-Signature` — see the Webhook Security pattern below.

**Python (Flask)**
```python
from flask import Flask, request
from twilio.twiml.messaging_response import MessagingResponse

app = Flask(__name__)

@app.route("/incoming", methods=["POST"])
def incoming_message():
    body = request.form.get("Body")
    response = MessagingResponse()
    response.message(f"Got your message: {body}")
    return str(response)
```

**Node.js (Express)**
```javascript
const express = require("express");
const twilio = require("twilio");
const app = express();
app.use(express.urlencoded({ extended: false }));

app.post("/incoming", (req, res) => {
    const twiml = new twilio.twiml.MessagingResponse();
    twiml.message(`Got your message: ${req.body.Body}`);
    res.type("text/xml").send(twiml.toString());
});
```

---

## Key Patterns

### Configure Webhook URL via API

For SMS/MMS on a phone number:

**Python**
```python
client.incoming_phone_numbers("PNxxxxxxxxxx").update(
    sms_url="https://yourapp.com/incoming",
    sms_method="POST"
)
```

**Node.js**
```javascript
await client.incomingPhoneNumbers("PNxxxxxxxxxx").update({
    smsUrl: "https://yourapp.com/incoming",
    smsMethod: "POST",
});
```

For WhatsApp and RCS, webhook URLs are configured on the sender — see `twilio-whatsapp-manage-senders` and `twilio-rcs-messaging`.

### Inbound Webhook Parameters

| Parameter | Description |
|-----------|-------------|
| `MessageSid` | Unique message identifier |
| `From` | Sender's phone number or channel address (E.164, or `whatsapp:+...`) |
| `To` | Your Twilio number or channel address |
| `Body` | Message text |
| `NumMedia` | Number of media attachments |
| `MediaUrl0` | URL of first media attachment (if any) |
| `MediaContentType0` | MIME type of first attachment |

### Handle Inbound Media (MMS / WhatsApp / RCS)

**Python (Flask)**
```python
@app.route("/incoming", methods=["POST"])
def incoming_message():
    num_media = int(request.form.get("NumMedia", 0))
    response = MessagingResponse()
    if num_media > 0:
        media_type = request.form.get("MediaContentType0")
        response.message(f"Got your {media_type} attachment!")
    else:
        response.message("Got your message.")
    return str(response)
```

**Node.js (Express)**
```javascript
app.post("/incoming", (req, res) => {
    const numMedia = parseInt(req.body.NumMedia || "0", 10);
    const twiml = new twilio.twiml.MessagingResponse();
    if (numMedia > 0) {
        twiml.message(`Got your ${req.body.MediaContentType0} attachment!`);
    } else {
        twiml.message("Got your message.");
    }
    res.type("text/xml").send(twiml.toString());
});
```

### Acknowledge Without Replying

**Python**
```python
return str(MessagingResponse())  # Empty <Response/>
```

**Node.js**
```javascript
res.type("text/xml").send(new twilio.twiml.MessagingResponse().toString());
```

### Status Callbacks (delivery tracking)

Status callbacks fire for all channels — SMS, MMS, WhatsApp, and RCS.

**Python**
```python
message = client.messages.create(
    messaging_service_sid="MGxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
    to="+15558675310",
    body="Hello!",
    status_callback="https://yourapp.com/status"
)
```

**Node.js**
```javascript
const message = await client.messages.create({
    messagingServiceSid: "MGxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
    to: "+15558675310",
    body: "Hello!",
    statusCallback: "https://yourapp.com/status",
});
```

**Python (Flask) — status callback handler**
```python
@app.route("/status", methods=["POST"])
def message_status():
    message_sid = request.form.get("MessageSid")
    status = request.form.get("MessageStatus")
    error_code = request.form.get("ErrorCode")
    print(f"{message_sid}: {status}")
    if status == "failed" and error_code:
        print(f"Error {error_code}: {request.form.get('ErrorMessage')}")
    return "", 204
```

**Node.js (Express) — status callback handler**
```javascript
app.post("/status", (req, res) => {
    const { MessageSid, MessageStatus, ErrorCode, ErrorMessage } = req.body;
    console.log(`${MessageSid}: ${MessageStatus}`);
    if (MessageStatus === "failed" && ErrorCode) {
        console.log(`Error ${ErrorCode}: ${ErrorMessage}`);
    }
    res.sendStatus(204);
});
```

Status flow: `queued → sent → delivered` (or `undelivered`/`failed`)

### Webhook Signature Validation

**Python (Flask)**
```python
from twilio.request_validator import RequestValidator

validator = RequestValidator(os.environ["TWILIO_AUTH_TOKEN"])

@app.route("/incoming", methods=["POST"])
def incoming_message():
    if not validator.validate(request.url, request.form, request.headers.get("X-Twilio-Signature", "")):
        return "Forbidden", 403
    response = MessagingResponse()
    response.message("Hello!")
    return str(response)
```

**Node.js**
```javascript
const { validateRequest } = require("twilio");

app.post("/incoming", (req, res) => {
    const isValid = validateRequest(
        process.env.TWILIO_AUTH_TOKEN,
        req.headers["x-twilio-signature"],
        `https://${req.headers.host}${req.path}`,
        req.body
    );
    if (!isValid) return res.status(403).send("Forbidden");
    const twiml = new twilio.twiml.MessagingResponse();
    twiml.message("Hello!");
    res.type("text/xml").send(twiml.toString());
});
```

---

## CANNOT

- **Cannot exceed 15-second webhook response time** — Twilio retries on timeout
- **Cannot return arbitrary content types** — Use `Content-Type: text/xml` with TwiML for replies; `204` for status callbacks
- **Cannot use ngrok URLs across restarts** — URLs change on restart. Use a stable tunnel for persistent testing.
- **Cannot guarantee delivery confirmation** — Status callbacks are best-effort. `delivered` requires carrier confirmation.

---

## Common Errors

| Code | Meaning | Fix |
|------|---------|-----|
| 11200 | HTTP retrieval failure — Twilio cannot reach your webhook URL | Verify endpoint is reachable (`curl -I` the URL), check DNS, firewall, and SSL certificate validity. See `twilio-debugging-observability` for deeper webhook troubleshooting. |

---

## Next Steps

- **Send outbound messages:** `twilio-send-message`
- **Manage sender pools:** `twilio-messaging-services`