Can I also request a Nanny at Amsternannies at the last minute?

Yes, this is possible.

If the request for a babysitting service is made less than 48 hours in advance, or on Friday after 12:00 for the weekend or the following Monday, the last minute rate applies. The mediation costs to Amsternannies are €19.95 per service if you have a FIXED subscription. If you have a FLEX subscription, the mediation costs are €24.95.