Sudden Errors When Accessing the Ads API

[theKetsuN]

This morning we started to receive errors from the Ads API when accessing promoted_tweets through a GET request. These requests have been fine up until this morning. We get the following error:

[{"code":"INVALID","message":"The JSON string format is invalid"}]

We have not changed anything within our code for this request. Is this a bug or is this related to how we are requesting the resource? If the latter, what is needed to fix it?

[imit8me]

Hey @theKetsuN

Thanks for raising the issue! Could you provide the full request as well?

Thanks!

[theKetsuN]

Hey @imit8me, thanks for responding. An example of the GET request is as follows:

https://ads-api.twitter.com/3/accounts/en2xr2/promoted_tweets?count=100&sort_by=updated_at-desc

The JSON response is the following:

{
	'errors': [{
		'message': 'The JSON string format is invalid',
		'code': 'INVALID'
	}],
	'operation_errors': [],
	'request': []
}

I’d also note that querying for campaigns and line items does not return this error. However, querying for promoted tweets and targeting criteria does return the error.

[theKetsuN]

@imit8me I figured out the issue. Passing the Content-Type header as application/json fails the call. Is this intended?

[imit8me]

Glad you were able to resolve the issue and the error response is intended/expected! The reason this fails the call is that with the Content-Type value set to application/json the API expects a JSON string in the POST body of the request and given that the request has only URL parameters, the request fails our validations. This header value should only be set when passing in a JSON object in the body of the request as with our batch endpoints or the Audience API.

Thanks!