How can I access grafana via url with api_key

Grafana version :4.2
OS :docker
I created some orgs in grafana and create their api_keys, now I want access dashboard via url, Before this I used nginx and put api_key in nginx so I can access, but it’s too trouble, I read the code and find the api_key is fetched from request headers and is not easy to modified, so is there any way to access dashboard via url,sorry about my poor English…