I need my MWS Seller ID and Primary Marketplace IDs and token. Where can I find these numbers. I have gone to Merchant central and I have found my token. But i don’t see any other ID.
So you need the Merchant Token/SellerId/MerchantId (all the same thing and which I see you found)
AccessKey and SecretKey
… and in some cases a MarketplaceId which you can get from a call to the Seller API or find it here :
As for the keys … look here: USER PERMISSIONS
Click the “Visit Developer Credentials” button