Head MCC with mulitple Sub MCC

[rut...@allfree.nl]

Hi,

Ik just made a succesfull connection via the Adwords API. I got a basic developer token for our Head MCC account. But now i cant access the underlaying sub MCC accounts. I want to get the campaign data of those sub MCC's.

When i look at the API centre of the sub MCC, then there is no developer token. Does this mean that i have to get basic tokens for all our Sub MCC's? We have alot of sub MCC's and i want to get data from all those campaigns. 

Is there any way that i can get the data from all sub MCC's with only the developer token of the head MCC? Our structure is like this:

MCC (head) > MCC (sub) > Account > Campaign  > Adgroup  > Keyword 

Thanks!

Rutger