Send campaign messages using API-triggered delivery

Use this endpoint to send immediate, one-off messages to designated users using API-triggered delivery.

API-triggered delivery allows you to house message content inside of the Braze dashboard while dictating when a message is sent, and to whom using your API.

If you’re targeting a segment, a record of your request will be stored in the Developer Console. To send messages with this endpoint, you must have a campaign ID created when you build an API-triggered campaign.

Prerequisites

To use this endpoint, you’ll need to generate an API key with the campaigns.trigger.send permission.

Rate limit

When specifying a segment or Connected Audience in your request, we apply a rate limit of 250 requests per minute to this endpoint. Otherwise, if specifying an external_id, this endpoint has a default rate limit of 250,000 requests per hour shared between /messages/send, /campaigns/trigger/send, and /canvas/trigger/send, as documented in API rate limits.

Braze endpoints support batching API requests. A single request to the messaging endpoints can reach any of the following:

• Up to 50 specific external_ids, each with individual message parameters
• A segment of any size created in the Braze dashboard, specified by its segment_id
• An audience segment of any size, defined in the request as a connected audience object

Request body

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Content-Type: application/json
Authorization: Bearer YOUR-REST-API-KEY

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{
  "campaign_id": (required, string) see campaign identifier,
  "send_id": (optional, string) see send identifier,
  "trigger_properties": (optional, object) personalization key-value pairs that will apply to all users in this request,
  "broadcast": (optional, boolean) see broadcast -- defaults to false on 8/31/17, must be set to true if "recipients" is omitted,
  "audience": (optional, connected audience object) see connected audience,
  // Including 'audience' will only send to users in the audience
  "recipients": (optional, array; if not provided and broadcast is not set to `false`, message will send to the entire segment targeted by the campaign)
    [
      {
      // Either "external_user_id" or "user_alias" or "email" is required. Requests must specify only one.
      "user_alias": (optional, user alias object) user alias of user to receive message,
      "external_user_id": (optional, string) external identifier of user to receive message,
      "email": (optional, string) email address of user to receive message,
      "prioritization": (optional, array) prioritization array; required when using email,
      "trigger_properties": (optional, object) personalization key-value pairs that will apply to this user (these key-value pairs will override any keys that conflict with the parent trigger_properties),
      "send_to_existing_only": (optional, boolean) defaults to true, can't be used with user aliases; if set to `false`, an attributes object must also be included,
      "attributes": (optional, object) fields in the attributes object will create or update an attribute of that name with the given value on the specified user profile before the message is sent and existing values will be overwritten
    }
  ],
  "attachments": (optional, array) array of JSON objects that define the files you need attached, defined by "file_name" and "url",
    [
      {  
       "file_name": (required, string) the name of the file you want to attach to your email, excluding the extension (for example, ".pdf"). Attach files up to 2 MB. This is required if you use "attachments",
       "url": (required, string) the corresponding URL of the file you want to attach to your email. The file name's extension will be detected automatically from the URL defined, which should return the appropriate "Content-Type" as a response header. This is required if you use "attachments",
      }
    ]
}

Request parameters

• The recipients array may contain up to 50 objects, with each object containing a single external_user_id string and a trigger_properties object.
• When send_to_existing_only is true, Braze will only send the message to existing users. However, this flag can’t be used with user aliases.
• When send_to_existing_only is false, an attribute must be included. Braze will create a user with the id and attributes before sending the message.

A user’s subscription group status can be updated using the inclusion of a subscription_groups parameter within the attributes object. For more details, refer to User attributes object.

Example request

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curl --location --request POST 'https://rest.iad-01.braze.com/campaigns/trigger/send' \
--header 'Content-Type: application/json' \
--header 'Authorization: Bearer YOUR-REST-API-KEY' \
--data-raw '{
  "campaign_id": "campaign_identifier",
  "send_id": "send_identifier",
  "trigger_properties": "",
  "broadcast": false,
  "audience": {
    "AND": [
      {
        "custom_attribute": {
          "custom_attribute_name": "eye_color",
          "comparison": "equals",
          "value": "blue"
        }
      },
      {
        "custom_attribute": {
          "custom_attribute_name": "favorite_foods",
          "comparison": "includes_value",
          "value": "pizza"
        }
      },
      {
        "OR": [
          {
            "custom_attribute": {
              "custom_attribute_name": "last_purchase_time",
              "comparison": "less_than_x_days_ago",
              "value": 2
            }
          },
          {
            "push_subscription_status": {
              "comparison": "is",
              "value": "opted_in"
            }
          }
        ]
      },
      {
        "email_subscription_status": {
          "comparison": "is_not",
          "value": "subscribed"
        }
      },
      {
        "last_used_app": {
          "comparison": "after",
          "value": "2019-07-22T13:17:55+0000"
        }
      }
    ]
  },
  "recipients": [
    {
      "user_alias": {
        "alias_name" : "example_name",
        "alias_label" : "example_label"
      },
      "external_user_id": "external_user_identifier",
      "trigger_properties": "",
      "send_to_existing_only": true,
      "attributes": {
        "first_name" : "Alex"
      }
    }
  ],
  "attachments": [
    {
      "file_name" : "YourFileName",
      "url" : "https://exampleurl.com/YourFileName.pdf"
    }
  ]
}'

Response details

Message sending endpoint responses will include the message’s dispatch_id for reference back to the dispatch of the message. The dispatch_id is the ID of the message dispatch, a unique ID for each transmission sent from Braze. When using this endpoint, you receive a single dispatch_id for an entire batched set of users. For more information on dispatch_id check out our documentation on Dispatch ID behavior.

If your request encounters a fatal error, refer to Errors and responses for the error code and description.

Attributes object for campaigns

Braze has a messaging object called attributes that will allow you to add, create, or update attributes and values for a user before you send them an API-triggered campaign. Using the campaign/trigger/send endpoint as this API call will process the user attributes object before it processes and sends the campaign. This helps minimize the risk of there being issues caused by race conditions. However, by default, subscription groups cannot be updated this way.