Fuchsia has an http client component [0][1] which is part of the platform and, given Fuchsia's component architecture, it's accessed through a message-passing protocol [2] which is programming language agnostic.

[0]: https://cs.opensource.google/fuchsia/fuchsia/+/main:sdk/fidl... [1]: https://cs.opensource.google/fuchsia/fuchsia/+/main:src/conn... [2]: https://fuchsia.dev/fuchsia-src/reference/fidl/language/lang...