Automatic Decompression in HTTP Action fails/does not work

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Posted on by HenningB

We are observing unexpected behavior in the HTTP action in Power Automate since about 1 week. All flows worked for over a year+ - some have been created in the past 3 months others are untouched for a year or more.

Our API returns:

Content-Encoding: gzip

Content-Type: application/json

The HTTP action setting “Automatic decompression” is turned ON. However, instead of returning parsed JSON, Power Automate returns:

{

"$content-encoding": "gzip",

"$content-type": "application/json; charset=UTF-8",

"$content": "H4sIAAAAA..."

}

So the response is wrapped as binary content and not decompressed automatically.

Additional observations:

Toggling “Automatic decompression” ON/OFF has no effect
The behavior is reproducible across flows
The same endpoint works normally in Postman and curl
This setup worked previously in production for months

Questions:

Has there been a recent change in the HTTP connector behavior?
Under which exact conditions does “Automatic decompression” apply?

Currently the only workaround is to manually base64-decode + gunzip (e.g., via Azure Function), which significantly complicates flows.

Any clarification would be appreciated.

Categories:

Building flows

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Expiscornovus 33,891 Most Valuable Professional on at

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Hi @CU23021122-0,

I am not aware of any recent change. That being said, I might have missed something 😅

I would recommend (in parallel to this thread) to also reach out to Power Automate support about this.

https://www.microsoft.com/en-us/power-platform/products/power-automate/support

Happy to help out 😁

I share more #PowerAutomate and #SharePointOnline content on my Blog, LinkedIn, Bluesky profile or Youtube Channel

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HenningB 6 on at

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Thank you very much for posting the link to MS support website. I was searching for that without success.

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ND-09030444-0 3 on at

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Hi @HenningB, Did you find an answer to this question? Having the exact same problem on all of my HTTP connections that worked without fail for the past 2+ years!

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HenningB 6 on at

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Hi @ND-09030444-0,

I got a mail from Microsoft telling me that this is a known product regression affecting the Power Automate HTTP connector. In short: still suffering from that issue and have no workaround yet.

Best,

Henning

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