POST request suddenly not working in Power Query.

[Tess]

POST request suddenly not working in Power Query. It worked perfectly a week or two ago. GET requests are working perfectly. I think it might have something to do with the new release of the Power BI Desktop Version: 2.139.2054.0 64-bit (January, 2025), which was release on Jan.29, 2025 if Google is right.

How can I fix this?

[v-ssriganesh · Accepted solution]

Hi @Tess,

Thank you for reaching out to the community, and a big thank you to @Fowmy for the detailed and helpful response.

Building on the suggestions provided, it’s indeed possible that the recent Power BI Desktop Version: 2.139.2054.0 (January 2025) update may have introduced some changes affecting POST requests in Power Query. Here are a few additional steps that might help you troubleshoot and narrow down the issue:

• Test the API in Postman: This will verify if the API is functioning correctly. If your POST request succeeds in Postman but fails in Power Query, it is likely an issue related to Power BI.
• If the request was working before, you can try using a previous version of Power BI Desktop to see if the issue is version specific.
• Sometimes updates impact how Power Query handles Web.Contents() or headers. Please double-check your M code for the POST request, ensuring the Content-Type header and body are correctly configured.
  
  

If this helps, then please Accept it as a solution and dropping a "Kudos" so other members can find it more easily.
Thank you.

[Fowmy]

@Tess 

It’s possible that the new Power BI Desktop update introduced changes affecting how Power Query handles POST requests. Since GET requests are still working, the issue could be related to authentication, headers, or how Power BI now processes body content in POST requests.

You may test it on the API in Postman or try download previous version of power BI desktop and try.