Send a Rich Multimedia Text Message

POST Method

The Send a Rich Multimedia Text Message API sends a rich multimedia message using RCS (Rich Communication Services). It supports standalone rich cards with media, title, description, and interactive suggestions like replies and actions.

Prerequisites

After you sign up, your account will be on the trial version. You must complete the KYC to access all the features in kaleyra.io.
Before you get started, Create an API Key. To view the API Key and the SID, see View API Key and SID.
Before sending the RCS, you must configure the RCS channel in the Kaleyra platform. To configure the RCS channel in your account, please contact your local Kaleyra representative.

You must have an approved AgentID or a specific number to be used as AgentID.

Base URL

https://rcs-api.<pod>.kaleyra.ai - For North America (NA).

https://rcs-api.<pod>.kaleyra.io - For rest of the world.

API Domain and Value

api_domain	Value
IN pod	https://rcs-api.in.kaleyra.io
NA pod	https://rcs-api.na.kaleyra.ai

API request to send a Rich Multimedia Text message

To send a rich multimedia text message, use the https://rcs-api.<pod>.kaleyra.ai/v1/<sid>/rcs/messages endpoint with the following request method:

Request Format

The following is the request format to send a rich multimedia text message:

curl --location --request POST 'https://<api_domain>/v1/<sid>/rcs/messages'\
--header 'Content-Type:<Content-Type>'\
--header 'api-key: <api-key>'\
--data {
  "from": "<from>", 
  "to": ["<to>"], 
  "richCardStandalone": { 
    "cardOrientation": "<cardOrientation>", 
    "content": { 
      "title": "<title>", 
      "description": "<description>", 
      "media": { 
        "height": "<height>", 
        "file": { 
          "fileUrl": "<fileUrl>", 
          "thumbnailUrl": "<thumbnailUrl>", 
          "contentDescription": "<contentDescription>" 
        } 
      }, 
      "suggestions": [ 
        { 
          "reply": { 
            "text": "<replyText>", 
            "postbackData": "<replyPostbackData>", 
            "openUrlAction": { 
              "url": "<replyUrl>" 
            } 
          } 
        }, 
        { 
          "action": { 
            "text": "<actionText>", 
            "postbackData": "<actionPostbackData>", 
            "openUrlAction": { 
              "url": "<actionUrl>" 
            } 
          } 
        } 
      ] 
    } 
  } 
}

Sample Request Format

The following is the sample request that describes how to send a rich multimedia text message:

curl --location --request POST 'https://rcs-api.na.kaleyra.ai/v1/xxxxx6913850xxxx/rcs/messages'\
--header 'Content-Type: application/json' \  
--header 'api-key: xxxxx3b8497f58a94e84b671aca43xxxx' \  
--data '  
{ 
   "from":"rcs-dev", 
   "to":["[9177xxxxx]", "[195xxxxx01]" 
   ], 
   "richCardStandalone":{ 
      "cardOrientation":"VERTICAL", 
      "content":{ 
         "title":"TATA Communications", 
         "description":"", 
         "media":{ 
            "height":"MEDIUM", 
            "file":{ 
               "fileUrl":"https://i.pinimg.com/736x/db/15/3f/db153ff5580c40fe7577d9fa7713f973.jpg", 
               "thumbnailUrl":"https://i.pinimg.com/736x/db/15/3f/db153ff5580c40fe7577d9fa7713f973.jpg", 
               "contentDescription":"C634893 - caption" 
            } 
         }, 
         "suggestions":[ 
            { 
               "reply":{ 
                  "text":"Interested in A2P Service", 
                  "postbackData":"C634889_response_reply", 
                  "openUrlAction":{ 
                     "url":"https://www.tatacommunications.com" 
                  } 
               } 
            }, 
            { 
               "action":{ 
                  "text":"Interested in P2P Service", 
                  "postbackData":"C634889_response_action", 
                  "openUrlAction":{ 
                     "url":"https://www.tatacommunications.com" 
                  } 
               } 
            } 
         ] 
      } 
   } 
}

URL Parameters and Headers

The following is the list of parameters and headers to send the outgoing message request:

Parameter/Headers	Data Type	Description	Example	Mandatory?
`sid`	String	Account SID (Security Identifier).	xxxxx6913850xxxx	Yes
`Content-Type`	String	Indicates the format of the content the API will be processing.	The only allowed value is application/JSON	Yes
`api-key`	String	API key generated from kaleyra.io account.	xxxxx3b8497f58a94e84b671aca43xxxx	Yes

Following is the list of attributes to be used in the payload to send the messages:

Parameter	Data Type	Description	Example	Mandatory?
`from`	String	The service code unique to the agent, specified when the agent is created/onboarded.	"rcs-dev"	Yes
`to`	Array of String	List of recipients’ device addresses (100 max.), which can either be a phone number in E.164 format prefixed with the country code without a plus sign, or a URI-like identification used to contact the user.	["[9177xxxxx]", "[195xxxxx01]"]	Yes
`richCardStandalone`	JSON Object	Container for rich card content.	See the specific table for details.	Yes

The following table describes the different attributes used for the richCardStandalone JSON object:

Parameter	Data Type	Description	Example	Mandatory?
`cardOrientation`	String	Defines the layout direction of the rich card’s content, specifying whether the card elements (like images, text, buttons, and chips) are arranged horizontally or vertically.	"VERTICAL"	Yes
`content`	JSON Object	The content of the rich card.	See the specific table for details.	Yes

The following table describes the different attributes used for the content JSON object:

Parameter	Data Type	Description	Example	Mandatory?
`title`	String	Title of the rich card.	"CIS Global Gateway"	Yes
`description`	String	Description text of the rich card (2000 Unicode characters max).	"Testing Rich Business Messaging Capabilities"	Yes
`media`	JSON Object	Media to be included in a rich card.	See the specific table for details.	No
`suggestions`	JSON Object	List of chiplist items (quick replies or actions).	See the specific table for details.	No

The following table describes the different attributes used for the media JSON object:

Parameter	Data Type	Description	Example	Mandatory?
`height`	String	Height of the media (SHORT, MEDIUM, TALL)	"MEDIUM"	Yes
`file`	JSON Object	File message content to send to the users’ device, typically an image, audio, or a video file.	See the specific table for details.	Yes

The following table describes the different attributes used for the file JSON object:

Parameter	Data Type	Description	Example	Mandatory?
`fileUrl`	String	Public accessible URL of the media file (image or video).	"https://live.staticflickr.com/...jpg "	Yes
thumbnailUrl	String	Public accessible URL of the thumbnail image.	"https://live.staticflickr.com/...jpg "	No
contentDescription	String	Description of the media content for accessibility.	"C634893 - caption"	No

The following table describes the different attributes used for the suggestions JSON object:

Parameter	Data Type	Description	Example	Mandatory?
`reply`	JSON Object	Contains the details of the reply chip.	See the specific table for details.	Yes (if reply)
`action`	JSON Object	Contains the details of the action chip.	See the specific table for details.	Yes (if action)

The following table describes the different attributes used for the reply JSON object:

Parameter	Data Type	Description	Example	Mandatory?
`text`	String	Text displayed on the reply chip.	"Thank you!"	Yes (if reply)
postbackData	String	Data sent back to your system when the reply chip is clicked.	"more_info"	Yes (if reply)
openUrlAction	JSON Object	Contains the URL to open when the reply chip is clicked.	See the specific table for details.	Yes (if reply)

The following table describes the different attributes used for the action JSON object:

Parameter	Data Type	Description	Example	Mandatory?
`text`	String	Text displayed on the action chip.	"Visit Website"	Yes (if action)
`postbackData`	String	Data sent back to your system when the action chip is clicked.	"tata_comm_website"	Yes (if action)
`openUrlAction`	JSON Object	Contains the URL to open when the action chip is clicked.	See the specific table for details.	Yes (if action)

The following table describes the different attributes used for the openUrlAction JSON object:

Parameter	Data Type	Description	Example	Mandatory?
`url`	String	A URL, as defined by RFC 2396 (4000 Unicode characters max).	https://www.tatacommunications.com/	Yes (if reply/action)

Sample Success Response

The following success message appears:

{
  "recipientDetails": [
    {
      "to": "9191588XXXXX",
      "messageId": "dc4cxxxx-xxxx-xxxx-xxxx-xxxx349a5e3d "
    }
  ]
}

The following examples illustrate typical success responses generated during the lifecycle of a message transmitted using the messaging platform. These responses represent key stages in message delivery, including successful submission to the carrier, delivery to the recipient's device, and confirmation of message read status. Each response includes metadata such as timestamps, message identifiers, and event types, which can be used for tracking and diagnostics.

Sent

The messages that are successfully submitted from Google to the carrier.

{ 
  "type": "SENT", 
  "eventId": "c8c3aa5d-1082-45a9-9f88-026c9XXXXX94", 
  "from": "9176739XXX02", 
  "to": "mmx_traffic", 
  "sentAt": "2025-06-16T13:46:38.929Z", 
  "messageId": "4543932d-c8f0-48c4-90bf-f9aXXXXXX2095f" 
}

Delivered

The messages that are successfully delivered to the recipient's handset.

{ 
  "type": "DELIVERED", 
  "eventId": "MxfdhMDmfXXXXXQQBlrIGcIg", 
  "from": "91767XXXXXX2", 
  "to": "mmx_traffic", 
  "sentAt": "2025-06-16T13:46:41.295Z", 
  "messageId": "4543932d-c8f0-48c4-90bf-f9aXXXXX005f" 
}

Read

The messages that have been read on the recipient's handset.

{ 
  "type": "READ", 
  "eventId": "MxZJragNjfT=qY4XXXXXYxcA", 
  "from": "917673XXXXX2", 
  "to": "mmx_traffic", 
  "sentAt": "2025-06-16T13:46:49.193Z", 
  "messageId": "4543932d-c8f0-48c4-90bf-f9aXXXXX005f" 
}

Error

The messages that have been undelivered.

For information related to error codes, see RCS Error Codes.

Updated about 8 hours ago