cargo-public-api ☆

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Description:
List and diff the public API of Rust library crates

Type: Formula | Latest Version: 0.50.1@0 | Tracked Since: Dec 17, 2025

Links: Homepage | formulae.brew.sh

Category: Developer tools

Tags: rust cli api developer-tools semver dev-tool

Install: brew install cargo-public-api

About:
cargo-public-api is a command-line tool for Rust developers to inspect and compare the public API of library crates. It leverages rustdoc's JSON output to generate a precise list of all public items, such as structs, traits, and functions. This is invaluable for managing API stability, as it can generate diffs between versions to detect breaking changes.

Key Features:

Generate a detailed list of all public API items from rustdoc JSON
Diff public APIs between different crate versions or git commits
Integrates with CI/CD to enforce semantic versioning and prevent breaking changes
Supports checking for changes in both nightly and stable Rust toolchains

Use Cases:

Verifying that a new release adheres to semantic versioning rules
Auditing dependencies for unexpected API changes that could cause breakage
Automating API stability checks in a continuous integration pipeline

Alternatives:

cargo-semver-checks – Focuses specifically on detecting semver violations, whereas cargo-public-api provides a more general-purpose tool for listing and diffing APIs.
rustdoc --output-format json – The underlying mechanism that cargo-public-api uses; the tool provides a user-friendly CLI and diffing capabilities on top of the raw JSON output.

Version History

Detected	Version	Rev	Change	Commit