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After a successful LTI® Launch is completed, LTIaaS will redirect the user to the URL registered during your onboarding configurations. LTIaaS will also append a ltik query parameter, a signed JWT identifying the current launch context.

LTIaaS launch flow:

Launch Flow

This token MUST be returned whenever the Tool wants to access any of the LTIaaS API Service endpoints.

LTIaaS Service API access flow:

API Service Access Flow

The ltik token must be passed to the API through the LTIK-AUTH-V1 Authorization header.

LTIK-AUTH-V1 Authorization header

LTIaaS implements it's own authorization schema LTIK-AUTH-V1:

Authorization: LTIK-AUTH-V1 Token=\<ltik>, Additional=Bearer \<API_KEY>

  • Token - Ltik authentication token.
  • API_KEY - API Key generated for your LTIaaS instance.


Authorization: LTIK-AUTH-V1 Token=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c, Additional=Bearer KxwRJSMeKKF2QT4fwpM

The Platforms endpoint

The only LTIaaS API endpoint that does not require the ltik to be passed is /admin/platforms, since this endpoint should be accessible outside of a LTI® Launch.

In order to access the Platforms endoint you must use a Bearer Authorization header passing the API Key generated for your LTIaaS instance.

Authorization: Bearer \<API_KEY>


Authorization: Bearer KxwRJSMeKKF2QT4fwpM