How to issue tokens with typ: jwt instead of at+jwt in Identity Server 4?

Question

Identity Server 4 in contrary to Identity Server 3 issues tokens with default value "typ": "at+jwt", however I still need to issue older version of token, meaning "typ": "jwt".

Is there any way to overwrite default configuration of IS4 and issue JWT token of "typ": "jwt"?

Answer 1

Just change the AccessTokenJwtType on AddIdentityServer:

var builder = services.AddIdentityServer(options =>
            {
                // see https://identityserver4.readthedocs.io/en/latest/topics/resources.html
                options.EmitStaticAudienceClaim = true;
                options.AccessTokenJwtType = "JWT";
            })

Here I explained it in my blog post as well