Quote from: buffett on December 06, 2014, 05:30:06 PM

I'm sorry for posting in a zombie thread. Anyone looking for a solution for accepting 0 confirmation payments may check blockcypher api: http://dev.blockcypher.com/reference.html#zero_confirmations

It's not mine but I think it's worth mention here since I was also struggling looking for a simple solution for this matter.

A better way would be to push the TX to the pools themselves.

Once you have a TX sent to you on your node (or you can view it on a block explorer), you have access to the raw, signed TX. You simply copy and paste the raw TX into a form that many pools have to have a particular TX included in the pools next block.

f2pool claims that any TX pushed via it's form will be given priority regardless of fee. (it is always a good practice to only accept a 0/unconfirmed TX if it included an appropriate fee)