JSON Exporter not working through the API

Although this is not the recommended use-case, the JSONExporter is not working when used through the API.

Start by locating the JSONExporter and the API entry point that invokes it, then reproduce the reported failure through the API. Compare that path with the recommended use case and define done as JSONExporter producing the expected export through the API; the issue provides no test or file name to guide verification.

Written by the indexing model from the issue text.