Our API: the basics

All URLs referenced in the documentation have the following base:

https://api.twilio.com/2010-04-01

The Twilio REST API is served over HTTPS. To ensure data privacy, unencrypted HTTP is not supported.

To authenticate requests to the Twilio APIs, Twilio supports HTTP Basic authentication. Use your API key as the username and your API key's secret as the password. You can create an API key either in the Twilio Console or using the API.

Note: Twilio doesn't recommend using your Account SID and Auth Token in production. For local testing, you can use your Account SID as the username and your Auth token as the password. You can find your Account SID and Auth Token in the Twilio Console.

Learn more about Twilio API authentication.

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curl -G https://api.twilio.com/2010-04-01/Accounts \
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     -u $TWILIO_API_KEY:$TWILIO_API_KEY_SECRET

Twilio Accounts have the following subresources. Click on a link to read the API documentation for accessing or modifying each resource:

• Search for Phone Numbers
• Purchase Phone Numbers
• Update Phone Number Properties
• Addresses

• View Usage Data for an Account
• Set Triggers for Usage Thresholds

• Accounts
• Subaccounts

• Applications
• Connect Apps
• Authorized Connect Apps

Twilio's Voice API enables you to make, retrieve, control and monitor calls. Using this REST API, you can make outgoing calls, modify calls in progress, and query metadata about calls. See the Voice API Documentation for guides, REST resources, and troubleshooting tips.

Programmable Voice SIP lets you route your voice calls with global reach to any landline phone, mobile phone, browser, mobile app, or any other SIP endpoint. Check out Twilio's SIP Resources for Voice including SIP Domains, IP Access Control Lists, and Credential Lists.

With Twilio's Messaging API, you can send and receive SMS and MMS messages as well as query meta-data about text messages such as delivery status, associated media, and leverage tools like Messaging Services to manage your messages globally at scale. Check out our Messaging API Documentation for guides, REST resources, and debugging tips.