Bad Request 400 when making API call to Microsoft Graph

Question

The error I'm getting from Microsoft Graph API is this

error = {
  "code": "BadRequest",
  "innerError": {
    "date": "2017-04-10T19:37:08",
    "request-id": "973641dd-b150-4406-9f3b-fbcf6f7e5aa1"
  },
  "message": "The MIME type 'text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2' requires a '/' character between type and subtype, such as 'text/plain'."
}

I'm able to successfully get from the endpoint https://graph.microsoft.com/v1.0/me/contacts while using POSTman however going the the scribe-java library OAuthRequest I receive this error.
My request is going to the url https://graph.microsoft.com/v1.0/me/contacts with 2 headers. Authorization -> Bearer [Token]
Content-Type -> application/json

Match the request headers you send with postman and your application. There are obviously differences. — Matt Clark
Hi Mark, Currently my POSTman and my request using the java library match. i.imgur.com/Pab6ejb.png this is what my post man request looks like. — dpark
Hi John, right click in your browser, and inspect the raw wire transfer. The server may also be expecting a User-Agent or something else. — Matt Clark
I don't see this in the request that postman makes. The only extra header that is included in postman is a "Postman-Token" -> "", but this should not make a different in making an API call to microsoft graph. — dpark
Could you post the code where you add the headers to your application request? I'm wondering if they're getting escaped or something. — piisexactly3

Nick Nick · Accepted Answer · 2017-04-19T19:24:05

Try setting the "Accept" header explicitly in your request. POSTman may be defaulting you to [Accept=text/html, image/gif, image/jpeg, *; q=.2, /; q=.2]

Bad Request 400 when making API call to Microsoft Graph

3 Answers