# How to Connect Your Twilio Agent to External APIs in Python

DevFeed: [How to Connect Your Twilio Agent to External APIs in Python](<https://devfeed.tech/articles/how-to-connect-your-twilio-agent-to-external-apis-in-python-16103.md>)

Original publisher: [Read original article](<https://www.twilio.com/en-us/blog/developers/tutorials/product/how-to-connect-twilio-agent-to-external-apis-python>)

Author: Amanda Lange, Dylan Frankcom

Published: 2026-09-12T00:00:00Z

Content type: tutorial

Language: en

Sources: [Twilio Blog](<https://devfeed.tech/sources/twilio-blog.md>)

Topics: [Python](<https://devfeed.tech/topics/python.md>), [API](<https://devfeed.tech/topics/api.md>), [FastAPI](<https://devfeed.tech/topics/fastapi.md>), [AI Agent](<https://devfeed.tech/topics/ai-agent.md>), [voice ai](<https://devfeed.tech/topics/voice-ai.md>), [REST API](<https://devfeed.tech/topics/rest-api.md>), [WebSocket](<https://devfeed.tech/topics/websocket.md>), [OpenAI](<https://devfeed.tech/topics/openai.md>)

Tags: [ai-agents](<https://devfeed.tech/tags/ai-agents.md>), [apis](<https://devfeed.tech/tags/apis.md>), [developer-insights](<https://devfeed.tech/tags/developer-insights.md>), [fastapi](<https://devfeed.tech/tags/fastapi.md>), [ngrok](<https://devfeed.tech/tags/ngrok.md>), [openai](<https://devfeed.tech/tags/openai.md>), [python](<https://devfeed.tech/tags/python.md>), [tutorial](<https://devfeed.tech/tags/tutorial.md>), [visual-studio-code](<https://devfeed.tech/tags/visual-studio-code.md>), [voice-ai](<https://devfeed.tech/tags/voice-ai.md>), [websocket](<https://devfeed.tech/tags/websocket.md>)

## AI overview

This tutorial explains how to connect a Twilio voice agent to an external REST API using Python and FastAPI. It demonstrates using LLM tool calling to fetch live data and take actions on a caller's behalf.

## Source excerpt

Learn how to connect a Twilio voice agent to an external API using Python, so it can fetch real-time data and take action on a caller's behalf.