Example project that demonstrates how to add phone number dialin to your Pipecat bots. We include examples for both Daily (bot_daily.py) and Twilio (bot_twilio.py), depending on who you want to use as a phone vendor.

🔁 Transport: Daily WebRTC
💬 Speech-to-Text: Deepgram via Daily transport
🤖 LLM: GPT4-o / OpenAI
🔉 Text-to-Speech: ElevenLabs

Should I use Daily or Twilio as a vendor?

If you're starting from scratch, using Daily to provision phone numbers alongside Daily as a transport offers some convenience (such as automatic call forwarding.)

If you already have Twilio numbers and workflows that you want to connect to your Pipecat bots, there is some additional configuration required (you'll need to create a on_dialin_ready and use the Twilio client to trigger the forward.)

You can read more about this, as well as see respective walkthroughs in our docs.

Setup

# Install the requirements
pip install -r requirements.txt

# Setup your env
mv env.example .env

Using Daily numbers

Run bot_runner.py to handle incoming HTTP requests:

python bot_runner.py --host localhost

Then target the following URL:

POST /daily_start_bot

For more configuration options, please consult Daily's API documentation.

Using Twilio numbers

As above, but target the following URL:

POST /twilio_start_bot

For more configuration options, please consult Twilio's API documentation.

Deployment example

A Dockerfile is included in this demo for convenience. Here is an example of how to build and deploy your bot to fly.io.

Please note: This demo spawns agents as subprocesses for convenience / demonstration purposes. You would likely not want to do this in production as it would limit concurrency to available system resources. For more information on how to deploy your bots using VMs, refer to the Pipecat documentation.

Build the docker image

docker build -t tag:project .

Launch the fly project

mv fly.example.toml fly.toml

fly launch (using the included fly.toml)

Setup your secrets on Fly

Set the necessary secrets (found in env.example)

fly secrets set DAILY_API_KEY=... OPENAI_API_KEY=... ELEVENLABS_API_KEY=... ELEVENLABS_VOICE_ID=...

If you're using Twilio as a number vendor:

fly secrets set TWILIO_ACCOUNT_SID=... TWILIO_AUTH_TOKEN=...

Deploy!

fly deploy

Need to do something more advanced?

This demo covers the basics of bot telephony. If you want to know more about working with PSTN / SIP, please ping us on Discord.