ProxyZip / Features / gRPC and Protobuf

Read gRPC and Protobuf without the schema

Binary protocols are hard to debug because you cannot read them. ProxyZip decodes Protobuf bodies on the wire and shows them as a tree, even when you do not have the .proto files.

What is decoded

• gRPC and gRPC-Web messages, with the method, direction and each message in the stream
• Plain Protobuf request and response bodies
• Trailers such as grpc-status

Without a schema, fields are shown by number: "1": "sku_1042", "3": 4900. ProxyZip infers the wire types and says so in the viewer, so you know the names are missing and not the data.

Add names

Import a descriptor set to see real field names. Messages keep their numbers and gain labels, and the tree is searchable like any other body.

Mock a gRPC service

A mock route can return a file. Binary files are served byte for byte, so a captured gRPC-Web frame replays unchanged and your client can be tested against it.

Work with the rest of the toolbox

• Filter the list with type:protobuf or by host
• Compare two messages with the Diff tab
• Copy the request as cURL or generate client code in 14 languages

See the inspecting guide.