The IDX API is available for Developers and Agents seeking to build a custom IDX Agent website providing access to the same data (in JSON format) used by FBS to create the WordPress plugin. The Flexmls IDX API is only available for MLSs that use the Flexmls Web system.
Although the Flexmls IDX API shares the same API as the Spark Platform, signing up for and using the Flexmls IDX API is separate from the Spark Platform. The Spark Platform is only for products sold through the Spark Store. For MLSs only using the Spark Platform, the Flexmls IDX API is not available.
If you have any questions about the difference between Flexmls IDX and the Spark Platform, please email firstname.lastname@example.org.