Documents were filed last week at the US Department of Justice detailing that APCO began a 15-day brief on 1 August, worth $74,200.
APCO, which has offices in Istanbul and its HQ in the US, is tasked with providing media relations, social media and other strategic services in order to "promote positive relations between the US and the Republic of Turkey", the documents say.
The 15 July coup attempt – which is explained and analysed in a blog post that appeared on the APCO website on 19 July – has resulted in calls for the death penalty to be reinstated, and a crackdown on media freedom.
PRWeek UK contacted APCO's London office this morning but was told nobody was available to comment.
The government of Turkey has also been working with Burson-Marsteller, another US-headquartered firm, which recently acquired an Istanbul agency, according to the client register of the UK's Association of Professional Political Consultants.