Granc

Linux

Freedom report

Two barsScore 6.3

Granc is ranked #13 of 23 in gRPC tools on Freedom251. It runs on Linux. There is a free plan.

Granc plans and pricing

Free/open-source software Free No paid plans or usage limits stated github.com · 4 Oct 2026

Product: Granc is a lightweight, dynamic gRPC command-line tool written in Rust.
JSON calls: It sends gRPC calls using JSON payloads without compiling the service’s Protobuf files into the client.
Encoding: It transcodes JSON to Protobuf and back at runtime.
RPC modes: It detects unary, server-streaming, client-streaming, and bidirectional calls from the descriptor.
Schema discovery: It can obtain schemas through server reflection or a local binary FileDescriptorSet file.
Inspection: Its commands list services and describe services, messages, and enums.
Documentation: It generates static, cross-linked Markdown documentation for services and types.
Request metadata: Requests can include custom headers such as authorization or tracing metadata.
Validation: Granc validates JSON before sending it over the network.
Library use: The core logic is available as a separate library crate for building tools such as integration tests, proxies, or automation tools.
Security limitation: TLS support with configurable root certificates and client identity is listed on the roadmap.
Distribution: The README gives `cargo install --locked granc` as the installation command.
Project status: The maker says the project moved to Codeberg; the GitHub repository was archived on March 9, 2026.
License: The project is offered under either the Apache License 2.0 or the MIT license, at the user’s option.
Price from: Free

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