Aperture is an implementation of L402s as a reverse HTTP proxy.
Aperture is a reverse proxy that acts as a payment and authentication gateway for Lightning Network powered APIs. It can handle gRPC requests over HTTP/2 as well as REST over HTTP/1 and 2.
Aperture receives incoming connections, verifies the validity of the L402 and either forwards the request to the appropriate end point, or obtains a Macaroon and sends it together with a Lightning invoice and the HTTP status code 402 Payment Required.
Aperture is currently used in production in Lightning Loop and Pool.