Is there a gpg-agent for cygwin?

Unfortunately, no (or not yet, as of March 2016). As the following thread from the Cygwin package maintainer for GnuPG suggests, gpg-agent is only available in GnuPG 2 and newer, but Cygwin is packaged with GnuPG 1.4.

• https://cygwin.com/ml/cygwin/2015-09/msg00067.html

On 04/09/2015 12:31, Andrew Schulman wrote:

So, why isn't there a gpg-agent for Cygwin? Any hope of having one some day?

From: Adam Dinwoodie

I suspect simply because nobody has packaged one, and somebody has to do the work to make it available. I doubt anyone would object to you submitting an Intent To Package per https://cygwin.com/setup.html.

On Thu, Sep 03, 2015 at 03:20:45PM -0400, Andrew Schulman wrote:

If that's the only reason, I could certainly look at packaging it. I guess I'd like to hear from Marco first though, the gnupg maintainer, to tell us if there isn't some other reason.

From: Marco Atzeri

for what I know gpg-agent belongs to GnuPG > 2.0 while we have only the classic gnupg-1.4.19

If I remember right GnuPG > 2.0 requires memory protection features that do not exist on cygwin. But I could be wrong.

Regards Marco