Mediator

What it does

Certificate handling

Each installation generates its own root certificate, available in DER and PEM formats, and a different installation requires reinstalling its certificate.checked 4 Oct 2026

Client examples

The README gives proxy setup examples for Java, Objective-C/iOS, and Go clients.checked 4 Oct 2026

Desktop downloads

The project lists Windows MSI, macOS DMG, Apple Silicon macOS DMG, and Linux deb distributions.checked 4 Oct 2026

Desktop framework

The project says it uses Netty for the proxy protocol, Compose Desktop for the GUI, and Sisyphus as the Protobuf runtime.checked 4 Oct 2026

Host rewrite

It can redirect requests to beta or test servers without changing client code.checked 4 Oct 2026

HTTPS inspection

It can decode gRPC/HTTPS requests when a server rule matches, using a Mediator root certificate installed in the client.checked 4 Oct 2026

Intended users

The repository describes the product as a gRPC debugging proxy and provides setup instructions for developers configuring gRPC clients.checked 4 Oct 2026

License

The repository identifies its license as Apache-2.0.checked 4 Oct 2026

Protobuf decoding

It parses gRPC request and response messages and can render binary messages as a JSON tree when an API schema is available.checked 4 Oct 2026

Proxy default

When the app opens, its proxy server listens on port 8888 by default.checked 4 Oct 2026

Purpose

Mediator is a cross-platform GUI proxy for debugging gRPC traffic.checked 4 Oct 2026

Schema sources

Mediator supports gRPC server reflection, proto source roots compiled with protoc, and FileDescriptorSet files as API schema sources.checked 4 Oct 2026