This is just a FYI post.
If you are working with Discovery Service APIs, then you would need to be comfortable with the ElasticSearch indexes and documents in Open edX. Kibana is a useful tool to visualize the elasticsearch documents, to aid your troubleshooting.
You can simply setup Kibana on a tutor instance by running a single command:
tutor Local Instance
docker run -d --name kibana_local --net tutor_local_default -p 5601:5601 -e ELASTICSEARCH_URL=http://elasticsearch:9200 kibana:4.1.3
tutor Dev Instance
docker run -d --name kibana_dev --net tutor_dev_default -p 5601:5601 -e ELASTICSEARCH_URL=http://elasticsearch:9200 kibana:4.1.3
Accessing Kibana on Browser
http://< hostname >:5601