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Frequent Visitor

Getting data with JSON body in M

Hello there,


I hope you can help me with the following problem as I have no single experience in working with JSON body in the script editor.

Below code worked all fine, but lately I've been receiving an error that an 'scode' exceeds the maximum file size. 

To resolve this problem, I have added the marked lines (in blue) to the code and put 'body' in the code instead of 'postData' (highlighted in orange).

The code is working in Postman, but Power BI gives an 500 Internal Server Error.




Can you tell me what I'm doing wrong?

I have tried several adjustments (like working with Json.FromValue), but no luck.

Thanks in advance.

Super User
Super User

Please follow the documentation

Web.Contents - PowerQuery M | Microsoft Learn

Json.FromValue and Text.ToBinary use different syntax.  

Frequent Visitor

Thanks for the response.


I've already looked into the documentation and understand the difference in syntax with using different functions. However, the documentation doesn't give me new insights in solving the problem. Frankly, I was surprised the above code results in an error.


content = Json.FromValue([reportParameters=[limit_from = 1, limit_amount = 10]])

Frequent Visitor

Tried that before as well, but still the 500 error shows up.

As you can imagine it is nearly impossible to help with API related issues without access to said API. Do they have a demo key?

Frequent Visitor

Unfortunately there's no demo key.

I'll just keep trying to sort this out. Learning by doing 😉

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