I have an API provisioned on APIMAN with Keycloak OAuth Policy and CORS Policy (using APIMAN Plugins) . Onclient side, I get the JWT token from Keycloak and add authorization header to get request sent to APIMAN for my own API. Problem is that APIMAN rejects OPTIONS preflight with 401 Unauthorized with message "OAuth2 'Authorization' header or 'access_token' query parameter must be provided." I am using APIMAN 1.2.7_final . I applied workaround in the JIRA issue given below but it didn’t work for me. Does it work for both APIMAN’s own rest endpoints and my own API’s. I suppose it is not valid for the later one. http://lists.jboss.org/pipermail/apiman-user/2016-July/000727.html https://issues.jboss.org/browse/APIMAN-1209 *TOKEN REQUEST TO KEYCLOAK* *General* Request URL:http://localhost:8280/auth/realms/company/protocol/openid-connect/ token Request Method:POST Status Code:200 OK Remote Address:127.0.0.1:8280 *Response Headers* Access-Control-Allow-Credentials:true Access-Control-Allow-Origin:http://localhost:8080 Access-Control-Expose-Headers:Access-Control-Allow-Methods Connection:keep-alive Content-Length:3175 Content-Type:application/json Date:Thu, 25 Aug 2016 07:22:59 GMT Server:WildFly/10 X-Powered-By:Undertow/1 *Request Headers* Accept:*/* Accept-Encoding:gzip, deflate Accept-Language:tr-TR,tr;q=0.8,en-US;q=0.6,en;q=0.4 Connection:keep-alive Content-Length:78 Content-Type:application/x-www-form-urlencoded Host:localhost:8280 Origin:http://localhost:8080 Referer:http://localhost:8080/login-services/login.html User-Agent:Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.103 Safari/537.36 Form Data view source view URL encoded username:username password:pasword grant_type:password client_id:company *GET REQUEST TO API on APIMAN *** *General* Request URL:http://localhost:8280/apiman-gateway/client/test-services-ws/1.0/g etuser/ Request Method:OPTIONS Status Code:*401 Unauthorized* Remote Address:127.0.0.1:8280 *Response Headers* Connection:keep-alive Content-Type:application/json Date:Thu, 25 Aug 2016 07:22:59 GMT Server:WildFly/10 Transfer-Encoding:chunked X-Policy-Failure-Code:11005 X-Policy-Failure-Message:*OAuth2 'Authorization' header or 'access_token' query parameter must be provided*. X-Policy-Failure-Type:Authentication X-Powered-By:Undertow/1 *Request Headers* Accept:*/* Accept-Encoding:gzip, deflate, sdch Accept-Language:tr-TR,tr;q=0.8,en-US;q=0.6,en;q=0.4 Access-Control-Request-Headers:authorization Access-Control-Request-Method:GET Connection:keep-alive Host:localhost:8280 Origin:http://localhost:8080 Referer:http://localhost:8080/login-services/login.html User-Agent:Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.103 Safari/537.36 İyi Çalışmalar, * * *Melih Özdemirkan* *AvivaSA Emeklilik ve Hayat A.Ş.* *Kanal ve Entegrasyon Uygulamaları * *Danışman* *www.avivasa.com.tr <http://www.avivasa.com.tr/>* *Saray Mah. Dr. Adnan Büyükdeniz Cad. 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