In order to create a multi-country survey you can use the Create survey endpoint.Using the mc_unique_id request parameter the API will allow to connect multiple survey with that unique ID. This will transform a single project to a multi- country project.
Restrictions & Considerations
Make sure the Multi-Country feature is active on your buyer account.
2 surveys with the same localization cannot be added. E.g. (for localization we define the combination between Language and Country (en_US).
Once the Multi-Country survey is launched, the ID cannot be used again.
Create the first multi country survey localized in "en_US" with the mc_unique_id set to test-mc-12345 as an example:
{"survey_title":"Test multi country 1","survey_category_code":231,"survey_localization":"en_US","completes_required":300,"offer_price":3.25,"expected_ir":60,"expected_loi":10,"live_url":"https://my.survey.com?survey_id=1234","test_url":"https://my.survey.com?survey_id=1234&test=1","field_time":10,"mc_unique_id":"test-mc-12345"}
Create another multi country survey localized in "es_US" (different localization) with the same mc_unique_id as above.
{"survey_title":"Test multi country 2","survey_category_code":231,"survey_localization":"es_US","completes_required":300,"offer_price":3.25,"expected_ir":60,"expected_loi":10,"live_url":"https://my.survey.com?survey_id=1234","test_url":"https://my.survey.com?survey_id=1234&test=1","field_time":10,"mc_unique_id":"test-mc-12345"}
Create another multi countru survey localized in "en_CA" (different localization) with the same mc_unique_id used in the step above.
{"survey_title":"Test multi country 3","survey_category_code":231,"survey_localization":"en_CA","completes_required":300,"offer_price":3.25,"expected_ir":60,"expected_loi":10,"live_url":"https://my.survey.com?survey_id=1234","test_url":"https://my.survey.com?survey_id=1234&test=1","field_time":10,"mc_unique_id":"test-mc-12345"}
Create further surveys, if needed, following the same steps as above.Launch all surveys individually using the Update survey status endpoint.