cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 

Error "unsupported_grant_type"

I'm trying to exchange the authorization code for a user access token on Python.
But I got an "unsupported_grant_type" error from eBay sandbox API endpoint.
I think I sent the correct 
authorization code grant request.

 

class EBAYRestAPI:
    def __init__(self):
        self.auth_api = os.environ['EBAY_SANDBOX_AUTH_API']
        self.client_id = os.environ['EBAY_CLIENT_ID']
        self.client_secret = os.environ['EBAY_CLIENT_SECRET']
        self.redirect_uri = os.environ['EBAY_REDIRECT_URI']
    def _generate_request_headers(self):
        # credential_data = self.client_id + ':' + self.client_secret
        # cred_bytes = credential_data.encode('ascii')
        # base64_bytes = base64.b64encode(cred_bytes)
        # base64_msg = base64_bytes.decode('ascii')
        # print(base64_msg)
        data = bytes(self.client_id + ':' + self.client_secret, encoding='utf-8')
        b64_encoded_credential = base64.b64encode(data)
        print(b64_encoded_credential.decode(encoding='utf-8'))
        headers = {
            'Content-Type': 'application/x-www-form-urlencoded',
            'Authorization': 'Basic ' + b64_encoded_credential.decode(encoding='utf-8')
        }
        return headers
    def _generate_oauth_request_body(self, code):
        body = {
            'grant_type': 'authorization_code',
            'redirect_uri': self.redirect_uri,
            'code':code
        }
        return body
    def exchange_code_for_access_token(self, code):
        headers = self._generate_request_headers()
        body = self._generate_oauth_request_body(code)
        response = urllib3.request('POST', self.auth_api, fields=body, headers=headers)
        content = response.json()
        print(content)
        return content

 

This is the response I received.

 

{
    "error": "unsupported_grant_type",
    "error_description": "grant type in request is not supported by the authorization server"
}

 


Just my Python code is running on my local.
Anyone can help me with the issue asap?

 

Message 1 of 3
latest reply
2 REPLIES 2

Error "unsupported_grant_type"

I'm having this same issue.  Did you ever figure it out or can anyone help?

Message 2 of 3
latest reply

Error "unsupported_grant_type"

Did anyone solve this? Can they post the resolution? Thanks

Message 3 of 3
latest reply