How to obtain an access token for accessing LTI Advantage Services?

Steve.H.432 Posts: 12 🌱
edited November 2022 in Development

I am receiving the following error:

{"error":"invalid_client","error_description":"Missing client"}


My curl headers are set:

--request POST 

--header "Authorization: Basic B64 Encoded clientID:client secret (this is missing!)"

--header "Content-Type: application/x-www-form-urlencoded"


My URL is set:


When registering an LTI Advantage Tool, I cannot find the client secret. It only provides the following registration details:


  • Client Id
  • Brightspace Keyset URL
  • Brightspace OAuth2 Access Token URL
  • OpenId Connect Authentication Endpoint
  • Brightspace OAuth2 Audience
  • Issuer