Cisco DevNet FMC REST API Sandbox "User authentication failed."

[dogemaster]

I am trying to use the FMC rest api using the always on sandbox, but I am unable to authenticate myself to generate a token. I have tried using postman and a custom script. Both return a 401 error (body shown below). Logging into https://fmcrestapisandbox.cisco.com/api/api-explorer/ with the same credentials work just fine.

{

    "error": {

        "category": "FRAMEWORK",

        "messages": [

            {

                "description": "User authentication failed."

            }

        ],

        "severity": "ERROR"

    }

}

I've made sure:
1) Certificate verification is turned off
2) Basic Auth is turned on with credentials from devnet sandbox email
3) POST method to https://fmcrestapisandbox.cisco.com/api/fmc_platform/v1/auth/generatetoken

Any help would be much appreciated

[Alex Stevenson]

Hi @dogemaster,

It's strange, right? For me, in Postman, it returns a 204 message, so no token, nothing, is returned.

I found a workaround, though.

I had Postman construct a cURL request and added the -v tag to get details. In that verbose response, you will find the X-auth-access-token! It will also include the domainUUID and other values, which are needed for many requests.

Plug that into Postman and send the GET request successfully.