I asked a couple of weeks ago if anyone knew if they could link their FSA card to their Paypal account. As it turns out, yes!! I have Wageworks and was able to add the debit card to the my account and pay my doula with it.
There was a fee and I didn't have an option of paying it with a different card. I imagine the fee will end up being rejected by the FSA. This way I don't have to pay out of pocket, just have to deal with all the paperwork after the delivery to get it validated. I guess if for whatever reason they reject the whole thing I have to send them a check, but I'll deal with it later.