Test inputs for phone calls

You can use your test credentials to test API requests to the outbound call endpoint without charging your account or making a call. Note that since no call is made, Twilio will not request the URL passed in the Url parameter and no TwiML will be executed.

Send a POST request to the outbound call API endpoint using your test credentials to authenticate and your TestAccountSid in the URL as seen below:

POST https://api.twilio.com/2010-04-01/Accounts/{TestAccountSid}/Calls

Parameters

All the existing outbound call parameters will work. In addition, we provide some specific values for certain parameters to help you generate success and failure cases.

From

Your test credentials don't have access to any valid 'From' phone numbers on your real account. Therefore the only phone number you should use as a 'From' number is the magic numbers listed in the table below:

Value	Description	Error Code
[phone]	This phone number is invalid.	21212
[phone]	This number is a valid From number for your account.	No error
All Others	The phone number is not verified for your account.	21210

To

Value	Description	Error Code
[phone]	This phone number is invalid.	21217
[phone]	Twilio cannot route to this number.	21214
[phone]	Your account doesn't have the international permissions necessary to call this number.	21215
[phone]	This number is blocked for your account.	21216
All Others	Any other phone number is validated normally.	Input-dependent

Use the API playground in this page to test each parameter values.

Encoding-type

The body parameters must be encoded using the application/x-www-form-urlencoded encoding type. This means that the request headers must use this encoding-type for the content-type field. Here is an example below:

content-type: application/x-www-form-urlencoded