Send a test SMS

API at a glance

Description: This API sends a test SMS/MMS message to a specific mobile number using a template's personalization context. Useful for testing SMS templates before launching campaigns.

Authentication & testing

Testing the API on this page

How to try it here

Use your User API Key as the Username (leave Password blank).

Select the appropriate API endpoint based on your Blueshift region.

Enter the necessary parameters and click Try It to run the request.

Authentication using Base64 encoding

Note for developers

API requests require authentication using HTTP Basic Authentication with an API key. The API key serves as the username, while the password field should be left empty. The format to encode is: your_api_key: (note the trailing colon).

This string must be Base64-encoded and included in the request's Authorization header as follows:

Authorization: Basic encoded_value

You can generate the encoded value using a trusted Base64 encoder.

Postman collection

Try it with Postman: Explore the API using Blueshift's Postman collection.

Things to know before you start

Mobile number format: Include the country code with the phone number. For example, for US number 2345678 with country code 1, specify as 12345678.
Personalization context: The personalize_for user's profile data is used to populate template variables (e.g., {{user.firstname}}).
Template UUID: The UUID of the SMS/MMS template you want to test.
Use case: Best for testing SMS/MMS templates, verifying personalization, previewing content before campaign launch, and QA testing.

Request parameters

Check out the request parameters

Body parameters

Parameter	Type	Required	Description
`uuid`	`string`	✅ Yes	The UUID of the SMS template to send.
`mobile`	`string`	✅ Yes	Mobile number with country code (e.g., `167892453` for US number with country code 1).
`personalize_for`	`string`	✅ Yes	Email address of the user whose personalization context to use.

Example requests & responses

Send a test SMS message

{
  "uuid": "153e6eaa-cae2-45a3-a59c-f6bed9a38712",
  "mobile": "167892453",
  "personalize_for": "[email protected]"
}

{
  "status": "OK"
}

API error responses

Note
The following error codes are commonly returned by Blueshift APIs. Depending on the specific endpoint, not all may apply.

Status code	Description	Example responses
400 Bad Request	The request is invalid due to missing or incorrect parameters. This includes missing fields, invalid values, formatting issues, or conflicts such as duplicate data.	`{ "errors": { "name": ["can't be blank"] } }` `{ "errors": { "startdate": ["can't be blank"] } }`
401 Unauthorized	API authentication failed due to an invalid or missing API key.	`{ "message": "Not authorized" }`
403 Forbidden	The API key does not have sufficient permissions to perform this action.	`{ "message": "Permission denied" }`
404 Not Found	The specified campaign was not found. Verify the campaign UUID.	`{ "message": "Campaign not found" }`
422 Unprocessable Entity	The campaign cannot be paused due to its current status (e.g., already completed or archived). One or more scheduling parameters may be invalid (if applicable).	`{ "message": "Campaign cannot be paused in its current status." }` `{ "message": "Invalid schedule values" }`
429 Too Many Requests	The request limit has been exceeded. Reduce request frequency.	`{ "message": "Rate limit exceeded" }`
500 Internal Server Error	An unexpected server error occurred. Contact support if the issue persists.	`{ "message": "Internal Server Error - Please contact support for more information." }`
502 Bad Gateway	The server received an invalid response. Retry the request.	`{ "message": "Bad Gateway - Please retry the request." }`
503 Service Unavailable	The service is temporarily unavailable. Try again later.	`{ "message": "Service Unavailable - The service is temporarily unavailable. Try again later." }`
504 Gateway Timeout	The server took too long to respond. Retry the request with exponential backoff.	`{ "message": "Gateway Timeout - The server took too long to respond. Retry with exponential backoff." }`