oath-toolkit ☆

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Description:
Tools for one-time password authentication systems

Type: Formula | Tracked Since: Dec 28, 2025

Links: Homepage | formulae.brew.sh

Category: Security

Tags: security authentication totp hotp 2fa cli

Install: brew install oath-toolkit

About:
OathToolkit provides a robust implementation of the HOTP and TOTP algorithms as specified by RFC 4226 and RFC 6238. It includes the liboath library for C integration and command-line utilities like oathtool for generating and validating one-time passwords. This makes it an essential component for adding two-factor authentication (2FA) to applications and systems.

Key Features:

C library (liboath) for programmatic integration
Command-line utility (oathtool) for easy scripting
Supports both HOTP and TOTP algorithms
Compliant with IETF RFC standards

Use Cases:

Adding two-factor authentication to custom applications
Generating TOTP codes for CLI-based workflows
Integrating OTP validation into system security scripts

Alternatives:

Google Authenticator – Provides a user-facing mobile app but OathToolkit is superior for server-side library integration and CLI usage.
Authy – A proprietary cloud-synced 2FA service, whereas OathToolkit is a lightweight, open-source library for developers.

Version History

Detected	Version	Rev	Change	Commit
Jan 27, 2026 2:20pm		0	REVISION_ONLY	29d4401b
Sep 14, 2025 6:38pm		0	VERSION_BUMP	99b46bb7