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We are trying to work with AWS ACM in us-east-1 region to automate the things. Trying to follow their doco and not getting too far with minimal ideas where to turn.

We get 404 and error <UnknownOperationException/> for everything that we send at it, even changing endpoint doesn't help.

Our API requests are validated using AWS4-HMAC-SHA256 as they request.

Hope we are missing something obvious, or, if someone has some experience with this specific endpoint can lend some pointers - thank-you so much in advance!

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Daniel
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    I highly recommend using the SDK. Those items in the docs are not query params, see the example request at the bottom. How are you computing the signature? – jordanm Jun 08 '23 at 04:01
  • Hey @jordanm. We are using Postman currently to compute the signature and testing within Postman. – Daniel Jun 08 '23 at 04:03

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