Acknowledge alert from the API

[Xana]

I need some advise regarding acknowledging alerts using the API.
I have been using this link as reference https://docs.opsgenie.com/docs/alert-api#acknowledge-alert

I am currently using PowerShell to get alerts successfully and then run some action offline.

As part of my post actions, I would like to acknowledge the alert but I'm not having much luck with that. I do suspect I'm doing it wrong. 

This is what I'm currently using to try and acknowledge the alert:

$opsGenieBaseURi = 'https://api.eu.opsgenie.com/v2/'

$apikey = 'mysecretkey'

$Headers = @{

            'Authorization' = "GenieKey $($apiKey)"

            'ContentType' = 'application/json'

             }

$request_uri = "alerts/38565/acknowledge?identifierType=tiny"

Invoke-RestMethod -Uri ($opsGenieBaseURi+$request_uri) -Headers $headers -Method POST

The error:

Invoke-RestMethod: {"message":"Content type 'application/x-www-form-urlencoded;charset=UTF-8' not supported","took":0.001,"requestId":

[Nick H · Accepted solution]

Hi @Xana ,

I think it might be as simple an incorrect header? 

Looks like yours is "ContentType"

While I believe it should be "Content-Type"

https://docs.opsgenie.com/docs/alert-api#acknowledge-alert

[Xana]

That does seem to be the problem. 

Thanks