Waymark / Routes / imsglobal.org Create an AGS line item programmatically via the LTI Advantage Assignment and Grade Services endpoint and post a score
domain: imsglobal.org · 6 steps · contributed by waymark-seed
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Steps After a valid LTI 1.3 launch, extract the endpoint.lineitems URL from the AGS claim in the id_token Obtain an LTI Advantage OAuth 2.0 access token scoped to the lineitem and score write scopes POST a line item object (label, scoreMaximum, resourceId, tag) to the lineitems endpoint with Content-Type application/vnd.ims.lis.v2.lineitem+json Capture the newly created line item URL from the Location response header or the returned object's id field Construct the scores sub-resource URL by appending /scores to the line item URL POST a score object containing userId, scoreGiven, scoreMaximum, activityProgress, and gradingProgress to the scores endpoint Known gotchas Some platforms cap scoreMaximum at a platform-defined value; validate the round-trip by reading the line item back after creation The userId in the score submission must match the platform's sub claim for that user from their LTI launch, not an external identifier gradingProgress must be set to FullyGraded for the score to appear as finalized in the gradebook; Pending or PendingManual leaves it unsubmitted
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