grpcui

7.1easy start · #19 of 38
in API clients

Free to practise onyes
Free trialnot on record
Well documentedyes
Runs where you workyes

Runs on Linux, Mac, self-hosted, Web, Windows.

grpcui is ranked #19 of 38 in API clients on The Geeks Club. It runs on Linux, macOS, Self-hosted, Web, Windows. There is a free plan.

grpcui plans and pricing

All plans

Open-source grpcui Free MIT license · use, modify, and contribute freely grpcui.com · 30 Sept 2026

Compared on API clients

Free plan: Yes
GraphQL support: No
gRPC support: Yes
WebSocket support: No
Automated test runs: No
API documentation: No
Team workspaces: No
Available platforms: web_and_desktop

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The record

Purpose: grpcui is a command-line tool for interacting with gRPC servers through a browser-based web UI.
API style: The project is described as similar to Postman for gRPC APIs instead of REST APIs.
Schema discovery: It can browse gRPC service schemas through server reflection, .proto source files, or compiled protoset files.
RPC support: grpcui supports all kinds of RPC methods, including streaming methods.
Streaming limit: Streaming requests must be constructed all at once and bidirectional streams cannot be interacted with like grpcurl.
Transport security: It supports plaintext and TLS servers, including mutual TLS with client certificates.
Request editor: The web UI provides dynamic HTML forms for protobuf messages, including well-known types, oneofs, and maps.
JSON input: Users can enter or paste an entire JSON request body in a dedicated text form.
Response display: After an RPC, the UI displays response headers, response messages or errors, trailers, and human-readable HTML tables.
Embedding: The repository includes Go packages for embedding a gRPC web form or a complete standalone gRPC web UI into a Go HTTP server.
Installation: Installation is documented through Homebrew on macOS or Linux and through the Go install command.
Container: The latest release page provides a container image command using ghcr.io/fullstorydev/grpcui:v1.5.4.
License: grpcui is released under the MIT license.
Audience: The tool is intended for developers who need to interactively construct requests and inspect gRPC service behavior.
Price from: Free

Where it ranks on The Geeks Club

Best API Clients in 2026#19 of 38
Best gRPC Tools in 2026#7 of 23

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Sources

github.com/fullstorydev/grpcui· checked 30 Sept 2026
github.com/fullstorydev/grpcui/releases· checked 30 Sept 2026
fullstory.com/blog/fullstory-crosses-the-pond-expands· checked 30 Sept 2026
grpcui.com/about-us/· checked 30 Sept 2026