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2025-03-20 12:31:08 -07:00
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# Byte-compiled / optimized / DLL files
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server/create_room.py

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# Handling PSTN/SIP Dial-in on Pipecat cloud
This repository contains two server implementations for handling
the pinless dialin workflow in pipecat cloud. This is the companion to the
[pstn/sip pcc starter images](https://github.com/daily-co/pipecat-cloud-images/tree/vr000m-starter-image-dial-in-out/pipecat-starters/pstn_sip).
In addition you can use `/api/dial` to trigger dial-out, and
eventually, call-transfers.
1. [Simple Python Server](simple-python/README.md) -
A FastAPI implementation that handles PSTN (Public Switched Telephone
Network) and SIP (Session Initiation Protocol) calls using the Daily API.
2. [Vercel Serverless](vercel/readme.md) -
A Next.js API implementation designed for deployment on Vercel's
serverless platform.
Both implementations provide:
- HMAC signature validation for pinless webhook
- Structured logging
- Support for dialin and dialout settings
- Voicemail detection and call transfer functionality (coming soon)
- Test request handling
## Choosing an Implementation
- Use the **Simple Python Server** if you:
- Need a standalone server
- Prefer Python and FastAPI
- Want to deploy to traditional hosting platforms
- Use the **Vercel Serverless** implementation if you:
- Want serverless deployment
- Prefer JavaScript/TypeScript
- Already use Vercel for other projects
- Need quick scaling and zero maintenance
## Prerequisites
### Environment Variables
Both implementations require similar environment variables:
- `DAILY_API_KEY`: Your Daily API key
- `AGENT_NAME`: Your Daily agent name
- `PINLESS_HMAC_SECRET`: Your HMAC secret for request verification
- `LOG_LEVEL`: (Optional) Logging level (defaults to 'info')
See the individual README files in each implementation directory for
specific setup instructions.
### ### Phone number setup
You can buy a phone number through the Pipecat Cloud Dashboard:
1. Go to `Settings` > `Telephony`
2. Follow the UI to purchase a phone number
3. Configure the webhook URL to receive incoming calls
Or purchase the number using Daily's
[PhoneNumbers API](https://docs.daily.co/reference/rest-api/phone-numbers).
```bash
curl --request POST \
--url https://api.daily.co/v1/domain-dialin-config \
--header 'Authorization: Bearer $TOKEN' \
--header 'Content-Type: application/json' \
--data-raw '{
"type": "pinless_dialin",
"name_prefix": "Customer1",
"phone_number": "+1PURCHASED_NUM",
"room_creation_api": "https://example.com/api/dial",
"hold_music_url": "https://example.com/static/ringtone.mp3",
"timeout_config": {
"message": "No agent is available right now"
}
}'
```
The API will return a static SIP URI (`sip_uri`) that can be called
from other SIP services.
### `room_creation_api`
To make and receive calls currently you have to host a server that
handles incoming calls. In the coming weeks, incoming calls will be
directly handled within Daily and we will expose an endpoint similar
to `{service}/start` that will manage this for you.
In the meantime, the server described below serves as the webhook
handler for the `room_creation_api`. Configure your pinless phone
number or sip interconnect to the `ngrok` tunnel or
the actual server URL, append `/api/dial` to the webhook URL.
## Examples curl commands
Note: Replace `http://localhost:3000` with your actual server URL and
phone numbers with valid values for your use case.
### Dialin Request
The server will receive a request when a call is received from Daily.
### Dialout Request
Dial a number, will use any purchased number
```bash
curl -X POST http://localhost:3000/api/dial \
-H "Content-Type: application/json" \
-d '{
"dialout_settings": [
{
"phoneNumber": "+1234567890",
}
]
}'
```
Dial a number with callerId, which is the UUID of a purchased number.
```bash
curl -X POST http://localhost:3000/api/dial \
-H "Content-Type: application/json" \
-d '{
"dialout_settings": [
{
"phoneNumber": "+1234567890",
"callerId": "purchased_phone_uuid"
}
]
}'
```
Dial a number
```bash
curl -X POST http://localhost:3000/api/dial \
-H "Content-Type: application/json" \
-d '{
"dialout_settings": [
{
"phoneNumber": "+1234567890",
"callerId": "purchased_phone_uuid"
}
]
}'
```
### Advanced Request with Voicemail Detection
```bash
curl -X POST http://localhost:3000/api/dial \
-H "Content-Type: application/json" \
-d '{
"To": "+1234567890",
"From": "+1987654321",
"callId": "call-uuid-123",
"callDomain": "domain-uuid-456",
"dialout_settings": [
{
"phoneNumber": "+1234567890",
"callerId": "purchased_phone_uuid"
}
],
"voicemail_detection": {
"testInPrebuilt": true
},
"call_transfer": {
"mode": "dialout",
"speakSummary": true,
"storeSummary": true,
"operatorNumber": "+1234567890",
"testInPrebuilt": true
}
}'
```

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# Daily PSTN/SIP Server
A FastAPI server that handles PSTN (Public Switched Telephone Network) and SIP (Session Initiation Protocol) calls using the Daily API.
## Requirements
- Python 3.8+
- FastAPI
- Uvicorn
- Python-dotenv
- Requests
- Pydantic
- Loguru
## Setup
1. Clone the repository
2. Install dependencies:
```bash
pip install -r requirements.txt
```
3. Copy `.env.example` to `.env`:
```bash
cp .env.example .env
```
4. Update `.env` with your credentials:
- `AGENT_NAME`: Your Daily agent name
- `DAILY_API_KEY`: Your Daily API key
- `PINLESS_HMAC_SECRET`: Your HMAC secret for request verification
## Running the Server
Start the server with:
```bash
python server.py
```
The server will run on `http://localhost:3000`
## API Endpoints
### GET /
Health check endpoint that returns a "Hello, World!" message.
### POST /api/dial
Initiates a PSTN/SIP call with the following request body format:
```json
{
"To": "+14152251493",
"From": "+14158483432",
"callId": "string-contains-uuid",
"callDomain": "string-contains-uuid",
"dialout_settings": [
{
"phoneNumber": "+14158483432",
"callerId": "+14152251493"
}
],
"voicemail_detection": {
"testInPrebuilt": true
},
"call_transfer": {
"mode": "dialout",
"speakSummary": true,
"storeSummary": true,
"operatorNumber": "+14152250006",
"testInPrebuilt": true
}
}
```
#### Response
Returns a JSON object containing:
- `status`: Success/failure status
- `data`: Response from Daily API
- `room_properties`: Properties of the created Daily room
## Error Handling
- 401: Invalid signature
- 500: Server errors (missing API key, network issues)
- Other status codes are passed through from the Daily API

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fastapi==0.104.1
uvicorn==0.24.0
python-dotenv==1.0.0
requests==2.31.0
pydantic==2.10.6
loguru==0.7.2

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#
# Copyright (c) 2025, Daily
#
# SPDX-License-Identifier: BSD 2-Clause License
#
# server.py
import base64 # for calculating hmac signature
import hmac
import os # for accessing environment variables
import time # for setting expiration time
from typing import Any, Dict, List, Optional
import requests
from dotenv import load_dotenv
from fastapi import FastAPI, HTTPException, Request
from loguru import logger
from pydantic import BaseModel, Field
load_dotenv(override=True)
app = FastAPI()
class RoomRequest(BaseModel):
test: Optional[str] = Field(None, alias="Test", description="Test field")
To: Optional[str] = Field(None, alias="to", description="Destination phone number")
From: Optional[str] = Field(None, alias="from", description="Source phone number")
callId: Optional[str] = Field(None, alias="call_id", description="Unique call identifier")
callDomain: Optional[str] = Field(
None, alias="call_domain", description="Call domain identifier"
)
dialout_settings: Optional[List[Dict[str, Any]]] = Field(
None, description="An array of phone numbers or SIP URIs to dialout to"
)
voicemail_detection: Optional[Dict[str, Any]] = Field(
None, description="A flag to perform voicemail or answeing-machine detection"
)
call_transfer: Optional[Dict[str, Any]] = Field(None, description="to initiate a call transfer")
class Config:
populate_by_name = True
alias_generator = None
"""
body can contain any fields, but for handling PSTN/SIP,
we recommend sending the following custom values:
dialin, dialout, voicemail detection, and call transfer
"To": "+14152251493",
"From": "+14158483432",
"callId": "string-contains-uuid",
"callDomain": "string-contains-uuid"
These need to be remapped to dialin_settings
"dialout_settings": [
{"phoneNumber": "+14158483432", "callerId": "+14152251493"},
{"sipUri": "sip:username@sip.hostname"}
],
},
voicemail_detection:{
testInPrebuilt: true
},
"call_transfer": {
"mode": "dialout",
"speakSummary": true,
"storeSummary": true,
"operatorNumber": "+14152250006",
"testInPrebuilt": true
}
"""
@app.get("/")
async def read_root():
return {"message": "Hello, World!"}
@app.post("/api/dial")
async def dial(request: RoomRequest, raw_request: Request):
logger.info("Incoming request to /dial:")
logger.info(f"Headers: {dict(raw_request.headers)}")
raw_body = await raw_request.body()
raw_body_str = raw_body.decode()
logger.info(f"Raw body: {raw_body_str}")
logger.info(f"Parsed body: {request.dict()}")
# calculate signature and compare/verify
hmac_secret = os.getenv("PINLESS_HMAC_SECRET")
timestamp = raw_request.headers.get("x-pinless-timestamp")
if timestamp:
signature = timestamp + "." + raw_body_str
logger.debug(f"Signature: {signature}")
base64_decoded_secret = base64.b64decode(hmac_secret)
computed_signature = base64.b64encode(
hmac.new(base64_decoded_secret, signature.encode(), "sha256").digest()
).decode()
if computed_signature != raw_request.headers.get("x-pinless-signature"):
logger.error("Invalid signature")
raise HTTPException(status_code=401, detail="Invalid signature")
if request.test == "test":
logger.debug("Test request received")
return {"status": "success", "message": "Test request received"}
dialin_settings = None
# these fields are camelCase in the request
required_fields = ["To", "From", "callId", "callDomain"]
if all(
field in request.dict() and request.dict()[field] is not None for field in required_fields
):
# transform from camelCase to snake_case because daily-python expects snake_case
dialin_settings = {
"From": request.From,
"To": request.To,
"call_id": request.callId,
"call_domain": request.callDomain,
# transform from camelCase to snake_case
}
logger.debug(f"Populated dialin_settings from request: {dialin_settings}")
daily_room_properties = {
"enable_dialout": request.dialout_settings is not None,
}
if dialin_settings is not None:
sip_config = {
"display_name": "dialin",
"sip_mode": "dial-in",
"num_endpoints": 2 if request.call_transfer is not None else 1,
}
daily_room_properties["sip"] = sip_config
# Setting default expiry to 5 minutes from now
daily_room_properties["exp"] = int(time.time()) + (5 * 60)
logger.debug(f"Daily room properties: {daily_room_properties}")
payload = {
"createDailyRoom": True,
"dailyRoomProperties": daily_room_properties,
"body": {
"dialin_settings": dialin_settings,
"dialout_settings": request.dialout_settings,
"voicemail_detection": request.voicemail_detection,
"call_transfer": request.call_transfer,
},
}
daily_api_key = os.getenv("DAILY_API_KEY")
agent_name = os.getenv("AGENT_NAME", "my-first-agent")
if not daily_api_key:
raise HTTPException(status_code=500, detail="DAILY_API_KEY environment variable is not set")
headers = {"Authorization": f"Bearer {daily_api_key}", "Content-Type": "application/json"}
url = f"https://api.pipecat.daily.co/v1/public/{agent_name}/start"
logger.debug(f"Making API call to Daily: {url} {headers} {payload}")
try:
response = requests.post(url, json=payload, headers=headers)
response.raise_for_status()
response_data = response.json()
logger.debug(f"Response: {response_data}")
return {
"status": "success",
"data": response_data,
"room_properties": daily_room_properties,
}
except requests.exceptions.HTTPError as e:
# Pass through the status code and error details from the Daily API
status_code = e.response.status_code
error_detail = e.response.json() if e.response.content else str(e)
logger.error(f"HTTP error: {error_detail}")
raise HTTPException(status_code=status_code, detail=error_detail)
except requests.exceptions.RequestException as e:
logger.error(f"Request error: {str(e)}")
raise HTTPException(status_code=500, detail=str(e))
if __name__ == "__main__":
try:
import uvicorn
uvicorn.run(app, host="0.0.0.0", port=3000)
except KeyboardInterrupt:
logger.info("Server stopped manually")

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# dependencies
/node_modules
/.pnp
.pnp.js
# testing
/coverage
# next.js
/.next/
/out/
# production
/build
# misc
.DS_Store
*.pem
# debug
npm-debug.log*
yarn-debug.log*
yarn-error.log*
.pnpm-debug.log*
# local env files
.env*.local
# vercel
.vercel
# typescript
*.tsbuildinfo
next-env.d.ts
# IDE specific files
.idea/
.vscode/
*.swp
*.swo
# Logs
logs
*.log
# OS generated files
.DS_Store
.DS_Store?
._*
.Spotlight-V100
.Trashes
ehthumbs.db
Thumbs.db

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PINLESS_HMAC_SECRET=your_hmac_secret
DAILY_API_KEY=your_daily_api_key
AGENT_NAME=my-first-agent
PORT=8000

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{
"name": "my-daily-app",
"version": "0.1.0",
"private": true,
"scripts": {
"dev": "next dev",
"build": "next build",
"start": "next start",
"lint": "next lint"
},
"dependencies": {
"axios": "^1.6.0",
"next": "^14.0.0",
"pino": "^8.15.0",
"react": "^18.2.0",
"react-dom": "^18.2.0"
},
"devDependencies": {
"eslint": "^8.46.0",
"eslint-config-next": "^14.0.0"
}
}

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import { logger } from '../../lib/utils';
import axios from 'axios';
import crypto from 'crypto';
const validateSignature = (body, signature, timestamp, secret) => {
// Skip if any required fields are missing
if (!signature || !timestamp || !secret) {
return true;
}
try {
const decodedSecret = Buffer.from(secret, 'base64');
const hmac = crypto.createHmac('sha256', decodedSecret);
const signatureData = `${timestamp}.${body}`;
const computedSignature = hmac.update(signatureData).digest('base64');
logger.debug('Signature validation:', {
timestamp,
signatureData: signatureData.substring(0, 50) + '...',
computedSignature,
receivedSignature: signature
});
return computedSignature === signature;
} catch (error) {
logger.error('Error validating signature:', error);
return true; // Allow request to proceed on error
}
};
export default async function handler(req, res) {
// Only allow POST requests
if (req.method !== 'POST') {
return res.status(405).json({ error: 'Method not allowed' });
}
try {
logger.info('Incoming request to /api/dial:');
logger.info(`Headers: ${JSON.stringify(req.headers)}`);
const rawBody = JSON.stringify(req.body);
logger.info(`Raw body: ${rawBody}`);
const signature = req.headers['x-pinless-signature'];
const timestamp = req.headers['x-pinless-timestamp'];
if (signature && timestamp) {
logger.info('Validating HMAC signature');
if (!validateSignature(rawBody, signature, timestamp, process.env.PINLESS_HMAC_SECRET)) {
logger.error('Invalid HMAC signature', { signature, timestamp });
return res.status(401).json({
error: 'Invalid signature',
message: 'Invalid HMAC signature'
});
}
} else {
logger.info('Skipping HMAC validation - no signature headers present');
}
// Extract request data
const {
Test: test,
To,
From,
callId,
callDomain,
dialout_settings,
voicemail_detection,
call_transfer
} = req.body;
// Handle test requests when a webhook is configured
if (test === 'test') {
logger.debug('Test request received');
return res.status(200).json({ status: 'success', message: 'Test request received' });
}
// Process dialin settings
let dialin_settings = null;
const requiredFields = ['To', 'From', 'callId', 'callDomain'];
if (requiredFields.every(field => req.body[field] !== undefined && req.body[field] !== null)) {
dialin_settings = {
// snake_case because pipecat expects this format
From,
To,
call_id: callId,
call_domain: callDomain,
};
logger.debug(`Populated dialin_settings from request: ${JSON.stringify(dialin_settings)}`);
}
// Set up Daily room properties
const daily_room_properties = {
enable_dialout: dialout_settings !== undefined && dialout_settings !== null,
exp: Math.floor(Date.now() / 1000) + (5 * 60), // 5 minutes from now
};
// Configure SIP if dialin settings are provided
if (dialin_settings !== null) {
const sip_config = {
display_name: 'dialin',
sip_mode: 'dial-in',
num_endpoints: call_transfer !== null ? 2 : 1,
};
daily_room_properties.sip = sip_config;
}
// Prepare payload for {service}/start API call
const payload = {
createDailyRoom: true,
dailyRoomProperties: daily_room_properties,
body: {
dialin_settings,
dialout_settings,
voicemail_detection,
call_transfer,
},
};
logger.debug(`Daily room properties: ${JSON.stringify(daily_room_properties)}`);
// Get Daily API key and agent name from environment variables
const dailyApiKey = process.env.DAILY_API_KEY;
const agentName = process.env.AGENT_NAME || 'my-first-agent';
if (!dailyApiKey) {
throw new Error('DAILY_API_KEY environment variable is not set');
}
// Set up headers for Daily API call
const headers = {
'Authorization': `Bearer ${dailyApiKey}`,
'Content-Type': 'application/json',
};
const url = `https://api.pipecat.daily.co/v1/public/${agentName}/start`;
logger.debug(`Making API call to Daily: ${url} ${JSON.stringify(headers)} ${JSON.stringify(payload)}`);
try {
const response = await axios.post(url, payload, { headers });
logger.debug(`Response: ${JSON.stringify(response.data)}`);
return res.status(200).json({
status: 'success',
data: response.data,
room_properties: daily_room_properties,
});
} catch (error) {
if (error.response) {
// Pass through status code and error details from the Daily API
const statusCode = error.response.status;
const errorDetail = error.response.data || error.message;
logger.error(`HTTP error: ${JSON.stringify(errorDetail)}`);
return res.status(statusCode).json(errorDetail);
} else {
logger.error(`Request error: ${error.message}`);
return res.status(500).json({ error: error.message });
}
}
} catch (error) {
logger.error(`Unexpected error: ${error.message}`);
return res.status(500).json({ error: 'Internal server error', message: error.message });
}
}
// Configure body parser to preserve raw body text
export const config = {
api: {
bodyParser: {
sizeLimit: '1mb',
},
},
};

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import { logger } from '../../lib/utils';
export default function handler(req, res) {
logger.info('Received request to /api');
res.status(200).json({ message: 'Hello, World! from ฅ^•ﻌ•^ฅ ☁' });
}

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# Daily API Backend
Next.js API routes for handling Daily Pipecat requests.
## Features
- API endpoint for handling Daily Pipecat requests
- HMAC signature validation
- Structured logging with Pino
- Support for dialin and dialout settings
- Voicemail detection and call transfer functionality
- Test request handling
## Setup
1. Clone the repository
2. Install dependencies:
```bash
npm install
```
3. Create `.env.local` file with your credentials:
```
DAILY_API_KEY=your_daily_api_key
AGENT_NAME=my-first-agent
PINLESS_HMAC_SECRET=your_hmac_secret
LOG_LEVEL=info
```
4. Run the development server:
```bash
npm run dev
```
## API Endpoints
### GET /api
Returns a simple "Hello, World!" message with a cute cat emoji to verify the server is running.
### POST /api/dial
Handles dialin and dialout requests for Daily Pipecat.
#### Test Requests
The endpoint handles test requests when a webhook is configured. Send a request with `"Test": "test"` to verify your setup:
```json
{
"Test": "test"
}
```
#### Production Request Format
```json
{
// for dial-in from webhook
"To": "+14152251493",
"From": "+14158483432",
"callId": "string-contains-uuid",
"callDomain": "string-contains-uuid",
// for making a dial out to a phone or SIP
"dialout_settings": [
{"phoneNumber": "+14158483432", "callerId": "purchased_phone_uuid"},
{"sipUri": "sip:username@sip.hostname.com"}
],
}
```
## Deployment
The application is configured for Vercel deployment:
1. Push your code to a Git repository
2. Import your project in Vercel dashboard
3. Configure environment variables:
- `DAILY_API_KEY`
- `AGENT_NAME`
- `PINLESS_HMAC_SECRET`
- `LOG_LEVEL` (optional, defaults to 'info')
4. Deploy!
## Security
- HMAC signature validation for request authentication
- Environment variables for sensitive credentials
- Method validation (POST only for /dial)

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module.exports = {
version: 2,
buildCommand: "next build",
outputDirectory: ".next",
cleanUrls: true
};