Granc
Granc: A focused self-hosted CLI for exploring gRPC services with JSON payloads. Ranked #14 of 24 in gRPC Tools by our editors (7.1/10); pricing: Open source; best for self-hosted JSON-focused gRPC exploration.
At a glance
- Editor score7.1 / 10
- PricingOpen source
- Best forSelf-hosted JSON-focused gRPC exploration
- Paid fromFree
- Facts checked20 Sep 2026
Where it wins
- Dynamically translates JSON to and from Protobuf
- Supports unary and all major streaming RPC modes
- Inspects schemas and generates static Markdown documentation
Where it doesn't
- Requires a command-line workflow
- Focused on exploration rather than broader platform workflows
- Project maintenance has moved from its archived GitHub repository
Our verdict on Granc
Granc is an open-source, self-hosted command-line tool for developers who need to call, explore, and document gRPC APIs from a local development environment. Its JSON-first workflow dynamically translates payloads to Protobuf and back through runtime descriptors, avoiding generated client code. It supports custom metadata and headers, validates JSON before network requests, and covers unary, server-streaming, client-streaming, and bidirectional calls.
Schema discovery is a central strength. Granc can use server reflection for runtime schema discovery or work with local FileDescriptorSet files, giving teams two ways to inspect services without relying on generated clients. Service, message, and enum introspection help developers understand an API’s structure, while Markdown documentation generation turns that information into static reference material. This combination makes Granc a practical fit for local API exploration, request preparation, and lightweight documentation workflows.
The trade-off is its deliberately narrow shape: Granc is a Rust CLI rather than a broader platform for managing gRPC development workflows. Teams looking for a graphical experience, hosted operations, or established CI, testing, or mocking capabilities should consider a tool with that wider scope instead. Granc is a better match for developers comfortable working in a terminal who want direct JSON input, metadata control, reflection, descriptor-set support, and coverage of every major RPC mode in one self-hosted utility.
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Granc pricing
Granc fact sheet
| Free plan | Not verified |
|---|---|
| Paid from | Free |
| Deployment model | Self_hosted |
| gRPC-Web support | Not verified |
| Server reflection | Yes |
| Mock server | Not verified |
| Protobuf editor | Not verified |
| Load testing | Not verified |
| CI integration | Not verified |
| Deployment | Self-hosted |
| Support | Docs |
| Built for | Solo, Small business, Mid-market (editorial estimate) |
| Pricing | Open source |
| Website | codeberg.org |
| Facts checked | 20 Sep 2026 |
Alternatives to Granc
- BanduraA free, cross-platform gRPC tester with strong offline, CLI, and CI coverage.9.4
- KreyaA broad desktop API client for gRPC, REST, GraphQL, WebSocket, and SSE workflows.9.2
- FintXA focused gRPC desktop test bench for invocation, functional checks, mocks, and load testing.8.9
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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