Inspera Assessment supports Custom Interaction API allowing customers to build specialised question types and stimuli elements with JavaScript or other tools such as Geogebra and Desmos, which still can be exchanged through IMS Question and Test Interoperability (IMS Global QTI) specification and IMS Global Portable Custom Interactions (IMS Global PCI) specification.

A Custom Interaction is a standard way for bespoke interaction types to be represented and exchanged as part of a IMS Global QTI XML.