twilio/call-to-action
The twilio/call-to-action
buttons let recipients tap to trigger actions such as launching a website, copying a coupon code, or making a phone call.
If you are using a URL button and want to submit the content template for WhatsApp approval, the URL must resolve to a publicly accessible website. If there is a variable, a valid path sample should be included in the variables array. The combined URL should resolve to a publicly accessible website.
For example, "url": ["https://www.twilio.com/{{1}}"]
would include a path sample in the variables
definition: "variables": {"1": "docs"}
.
Warning
Twilio/call-to-action
content templates can be sent via WhatsApp for out of session messages with variables. If the content template's body starts or ends with a variable, it won't be approved by WhatsApp. The same applies if two variables are placed next to each other. A sample variable is required. For additional information about variables, see Using Variables with Content Templates.
- Facebook Messenger
VOICE_CALL
andVOICE_CALL_REQUEST
are currently a private beta feature in select regions.- If the content template is being sent in session over WhatsApp without approval, only three buttons are allowed.
- On WhatsApp, a card must be approved as a content template before it can be sent. Additional approval steps are required if you use variables with
twilio/card
. A valid media sample is required if atwilio/card
content template is created with media and/or variables and you plan to submit this template to WhatsApp for approval. Static media URLs should resolve to publicly hosted media files. Variable media URLs should include a valid media URL suffix in the variable declaration. - Each approved variable WhatsApp card template can include only one type of media. WhatsApp classifies approved templates into 1 of 3 types of media headers (Image, Video, Document) based on the sample that was submitted. Once the template has been approved another type of media header can't be sent using the template.
- For example, if a content template is approved with an image, you can't send a video using that same content template.
- If the content template's body starts or ends with a variable or has two variables next to each other, the content template won't be approved by WhatsApp without a sample variable. For additional information about variables, see Using Variables with Content Templates.
- When creating your content template, ensure that the phone number in the actions array below is valid. Otherwise, the content template will fail to send.
- WhatsApp footers translate to subtitles in
twilio/cards
. - Template approval is required if multiple buttons are present.

Parameter | Type | Required | Variable support | Description |
---|---|---|---|---|
body | string | Yes | Yes | The text of the message you want to send. This is included as a regular text message. Maximum length: 640 characters |
actions | array | Yes | Yes | Call to action content templates support URL , PHONE , COPY_CODE , and VOICE_CALL buttons. |
To learn more about see [common components], see common components.
Info
Limitations:
- Only one of the two call options can be on a content template:
PHONE
VOICE_CALL
- Up to two URL buttons are allowed.
- Up to five quick reply buttons are allowed.
Property | Supported channels | Parameters |
---|---|---|
URL |
|
|
PHONE |
|
|
VOICE_CALL |
| |
VOICE_CALL_REQUEST |
| |
COPY_CODE |
|
1// Install the C# / .NET helper library from twilio.com/docs/csharp/install23using System;4using Twilio;5using Twilio.Rest.Content.V1;67TwilioClient.Init(accountSid, authToken);89// define the twilio/call-to-action type10var twilioCallToAction = new TwilioCallToAction.Builder();11twilioCallToAction.WithBody("Owl Air: We will see you soon! Flight {{1}} to {{2}} departs at {{3}} from Gate {{4}}.");12var cta1 = new CallToAction.Builder()13.WithType(CallToActionActionType.Url)14.WithUrl("https://owlair.com/{{5}}")15.WithTitle("Check Flight Status")16.Build();17var cta2 = new CallToAction.Builder()18.WithType(CallToActionActionType.PhoneNumber)19.WithPhone("+15555551234")20.WithTitle("Call Support")21.Build();22twilioCallToAction.WithActions(new List<CallToAction>() { cta1, cta2 });2324// define all the content types to be part of the template25var types = new Types.Builder();26types.WithTwilioCallToAction(twilioCallToAction.Build());2728// build the create request object29var contentCreateRequest = new ContentCreateRequest.Builder();30contentCreateRequest.WithTypes(types.Build());31contentCreateRequest.WithLanguage("en");32contentCreateRequest.WithFriendlyName("owl_air_cta");33contentCreateRequest.WithVariables(new Dictionary<string, string>() { {"1", "flight_number"}, {"2", "arrival_city"}, {"3", "departure_time"}, {"4", "gate_number"}, {"5", "url_suffix"} });3435// create the twilio template36var contentTemplate = await CreateAsync(contentCreateRequest.Build());3738Console.WriteLine($"Created Twilio Content Template SID: {contentTemplate.Sid}");
Output
1{2"account_sid": "ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",3"date_created": "2022-01-15T17:09:58Z",4"date_updated": "2022-01-15T17:09:58Z",5"friendly_name": "owl_air_cta",6"language": "en",7"links": {8"approval_fetch": "https://content.twilio.com/v1/Content/HXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/ApprovalRequests",9"approval_create": "https://content.twilio.com/v1/Content/HXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/ApprovalRequests/whatsapp"10},11"sid": "HXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",12"types": {13"twilio/call-to-action": {14"actions": [15{16"url": "https://owlair.com/{{5}}",17"type": "URL",18"title": "Check Flight Status"19},20{21"phone_number": "+15555551234",22"type": "PHONE_NUMBER",23"title": "Call Support"24}25],26"body": "Owl Air: We will see you soon! Flight {{1}} to {{2}} departs at {{3}} from Gate {{4}}."27}28},29"url": "https://content.twilio.com/v1/Content/HXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",30"variables": {31"1": "flight_number",32"3": "departure_time",33"2": "arrival_city",34"5": "url_suffix",35"4": "gate_number"36}37}