Techniques for making preliminary authorization determinations based on partial contextual information are disclosed. In one or more embodiments, an API receives an authorization request and partial contextual information associated with the authorization request. The API submits the partial contextual information to an authorization service, without submitting complete contextual information associated with the authorization request. The API receives, from the authorization service, a preliminary authorization response based on the partial contextual information. The preliminary authorization includes one of (a) denial of the authorization request and (b) non-denial of the authorization request. Based on the authorization request including non-denial of the authorization request, the API further processes the authorization request by obtaining a final authorization result based on the complete contextual information associated with the authorization request and, responsive to the authorization request, providing the final authorization result.