creachadair/otp

A Go implementation of the HOTP (RFC 4226) and TOTP (RFC 6238) algorithms.

187 commits

updated Sep 16, 2026

README

otp

This repository contains a Go package to generate single use authenticator codes using the HOTP (RFC 4226) or TOTP (RFC 6238) algorithm.

google-authenticator

hotp

otp

otpauth

totp

Project health

Overall

6.1/10

Maintained

10/10

Code review

0/10

OpenSSF Scorecard

Go module

github.com/creachadair/otp

Latest release

v0.5.5 · Aug 29, 2026

Releases this year

Significant stargazers

Ettore Di Giacinto

2,576 followers · starred Nov 2022

Robin

341 followers · starred Jun 2025

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