Send WhatsApp Call Button Messages and Deep Links | Developer Documentation Send WhatsApp Call Button Messages and Deep Links Updated: Feb 25, 2026 Overview After you adopt Cloud API Calling features, you can raise awareness with your customers in two core ways: Send them a message with a WhatsApp call button Embed a calling deep link into your brand surfaces (website, application, and so on) Send interactive message with a WhatsApp call button Use this endpoint to send a free-form interactive message with a WhatsApp call button during a customer service window or an open conversation window . When a WhatsApp user clicks the call button, it initiates a WhatsApp call to the business number that sent the message. A standard message status webhook will be sent in response to this message send. Body parameters Learn more about sending interactive free form messages Parameter Description Sample Value to Integer Required The phone number of the WhatsApp user you are messaging. Learn more about formatting phone numbers in Cloud API "17863476655" type String Required The type of interactive message you are sending. In this case, you are sending a voice_call . Learn more about interactive messages "voice_call" action String Required The action of your interactive message. Must be voice_call . "voice_call" parameters JSON Object Optional Optional parameters for the WhatsApp calling button sent to the user. Contains three values: display_text , ttl_minutes , and payload display_text — ( String ) Optional The display text on the WhatsApp calling button sent to the user. Default is “Call Now” Max length: 20 characters ttl_minutes — ( Integer ) Optional Time to live for the call-to-action (CTA) button in minutes. Must be between 1 and 43200 (30 days) Default value is 10080 (7 days) payload — ( String ) Optional An arbitrary string, useful for tracking. Any app subscribed to the calls webhook field on the WhatsApp Business Account can get this string, as it is included in the connect and terminate webhook payloads under the cta_payload field. Cloud API does not process this field, it just returns it as part of the webhooks. Maximum 512 characters. Payload is only available to WhatsApp client starting on version 2.25.27. Success response Learn more about messaging success responses Error response Possible errors that can occur: Sending this message to users on older app versions results in an error webhook with error code 131026 . View general Cloud API error codes Create and send WhatsApp call button template message Use these endpoints to create and send a WhatsApp call button template message. Once your call button template message is created, you can send a message to a WhatsApp user, inviting them to call your business. Learn more about creating and managing message templates Create call button message template Use this endpoint to create a call button message template. Body parameters You can create and manage template messages through both Cloud API and the WhatsApp Business Manager interface. When creating your call button template, ensure you configure type as voice_call . Learn more about creating and managing message templates Parameter Description Sample Value type String Required The type of template message you are creating. In this case, you are creating a voice_call . "voice_call" text String Optional The display text on the WhatsApp calling button sent to the user. Default is “Call Now” Max length: 20 characters "Call Now" ttl_minutes Integer Optional Time to live for the CTA button in minutes. Must be between 1440 (1 day) and 43200 (30 days). You can override this value when sending the message. 1440 Success response Learn more about messaging success responses Error response Possible errors that can occur: Invalid whatsapp-business-account-id Permissions/Authorization errors Template structure/component validation alerts View general Cloud API error codes Calling deep links Calling deep links are hyperlinks that route WhatsApp users to call your business. The process to create a calling deep link is similar to a chat deep link ⁠ , except the format for the call deep link is wa.me/call/ Note that deep links are not supported on WhatsApp desktop clients. Embed calling deep links You can use calling deep links to advertise WhatsApp calling for your business. Use these links anywhere where calling can be useful, like your website, primary application, or even as a QR code to be shared. Send calling deep links You can also send messages to WhatsApp users with a calling deep link. Since deep links can be made per business phone number, you can use calling deep links to prompt WhatsApp users to contact a different phone number with voice enabled. The wa.me/call/ format is easy to copy, paste, and send, and does not require you to make a template in Business Manager. Send payload data in call deep link You can also send a payload with the deep link. You can use the biz_payload query string when sending the call deep link to any user ( wa.me/call/?biz_payload=payload ). When a user calls using the provided deep link with the biz_payload any app subscribed to the calls webhook field on the WhatsApp Business Account can get this string, as it is included in the connect and terminate webhook payloads under the deeplink_payload field. Payload in call deep link is only available to WhatsApp client starting on version 2.25.27.