Configure NGrok Login as an Administrator: Visit 'Site administration' > 'Plugins' > 'Activity modules' > 'External tool' > 'Manage tools' Select configure a tool manually Create the tool: name: ZTest Tool URL: https://ztest.cengage.info/ztest/lti11 Consumer Key: Ztest-Moodle (value does not actually matters) Shared Secret: ztest-secret Privacy: set all options to Always Services: enable IMS LTI membership As an instructor go to a test course Turn editing on Add an Activity or Resource > External tool Name: ZTest Link 1 Preconfigured tool: ZTest Save and Display From the list of parameters shown in the ZTest page, copy the value of: custom_context_memberships_url ; and resource_link_id Go to Any Call tab Enter: URL: paste the value from custom_context_memberships_url and add at the end ?rlid=<value of resource_link_id> method: GET content-type:  application/vnd.ims.lis.v2.membershipcontainer+json Execute the query Verify that for each membership record, there is a message attribute Verify thateach message attribute takes the form: "message" : [ { "message_type" : "basic-lti-launch-request", "lis_result_sourcedid" : "..." } ]