Skip to main content
cancel
Showing results for 
Search instead for 
Did you mean: 

Enhance your career with this limited time 50% discount on Fabric and Power BI exams. Ends August 31st. Request your voucher.

Reply
PowerUser123
Helper II
Helper II

API Connection - Undefined Varaible: Json

I have the following query that generates a token to be used for an API call, but I'm getting an error message stating: Undefined Variable: json

 

I'm not sure if I'm missing anything or doing anything wrong?

let
    
    api_url = "https://someapi.com/api/",
    token_path = "getAccessToken", 
    Token_Response  = Json.Document(Web.Contents(api_url,
    [ 
      RelativePath = token_path,
      Headers = [#"Content-Type"="application/x-www-form-urlencoded"],
      Content=Text.ToBinary("username=clientid&password=password111")
    ]
    )
    ),
   
    token = Token_Response[token],

    path = "getList",  
    endDate = "2022-04-25 00:00:00",
    startDate= "2022-04-26 00:00:00",

    data1= Json.Document(Web.Contents(api_url,
   [ 
     Headers = [#"Accept"="application/json"],
     RelativePath = path,
     Query = [end_date=endDate, start_date=startDate, api_token=token]
     
   ]
   )
   )
in
     data1
2 REPLIES 2
v-chenwuz-msft
Community Support
Community Support

Hi @PowerUser123 ,

 

Please make sure the token or data1 reponse of web.connect is json type.

 

Best Regards

Community Support Team _ chenwu zhu

 

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

amirabedhiafi
Impactful Individual
Impactful Individual

https://community.powerbi.com/t5/Desktop/Issue-with-getting-data-via-API-with-bearer-token/td-p/1262...

Amira Bedhiafi
Full Stack Business Intelligence Consultant @Capgemini

Helpful resources

Announcements
July 2025 community update carousel

Fabric Community Update - July 2025

Find out what's new and trending in the Fabric community.

July PBI25 Carousel

Power BI Monthly Update - July 2025

Check out the July 2025 Power BI update to learn about new features.

Join our Fabric User Panel

Join our Fabric User Panel

This is your chance to engage directly with the engineering team behind Fabric and Power BI. Share your experiences and shape the future.