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What is oauth2?

golang/oauth2 — explained in plain English

Analysis updated 2026-06-26

★ 5,852GoAudience · developerComplexity · 2/5Setup · moderate

In one sentence

The official Go library for OAuth 2.0, handles the sign-in-with-Google or connect-to-GitHub authentication flow, token management, and automatic token refresh for Go programs.

Mindmap

mindmap
  root((golang oauth2))
    What it does
      OAuth 2.0 auth flow
      Token management
      Auto token refresh
    Providers
      Google built-in
      Common endpoints pkg
      Any OAuth 2.0 provider
    Use Cases
      Sign in with Google
      GitHub API access
      Service auth
    Setup
      go get package
      Official Go library
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filefunction / class

What do people build with it?

USE CASE 1

Add 'Sign in with Google' to a Go web application without manually managing OAuth token exchanges.

USE CASE 2

Build a Go tool that accesses a user's GitHub repositories by handling OAuth 2.0 authorization automatically.

USE CASE 3

Connect a Go backend to any OAuth 2.0 provider using the built-in endpoints sub-package.

What is it built with?

Go

How does it compare?

golang/oauth2docker/clitendermint/tendermint
Stars5,8525,8505,860
LanguageGoGoGo
Setup difficultymoderatehardhard
Complexity2/54/55/5
Audiencedeveloperdeveloperdeveloper

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · moderate Time to first run · 30min

Requires registering your app with an OAuth provider (like Google or GitHub) to obtain client credentials before running.

Part of the official Go extended standard library, specific license not stated in the explanation.

So what is it?

This is the official Go library for OAuth 2.0, maintained by the Go team. OAuth 2.0 is the standard protocol used when an app asks permission to access your account on another service, such as signing in with Google or letting a tool read your GitHub repositories without giving it your password. The library handles the details of that authentication flow for developers writing Go programs. It manages tokens, refreshes them when they expire, and includes built-in support for connecting to Google services. There is also a separate sub-package listing endpoints for common providers. The README is short and points to the full documentation and examples on pkg.go.dev. The project is part of the official Go extended standard library and follows Go's contribution process, which uses a code review system called Gerrit rather than standard GitHub pull requests.

Copy-paste prompts

Prompt 1
Using golang/oauth2, write a Go HTTP handler that redirects users to Google's OAuth 2.0 login page and exchanges the callback code for an access token.
Prompt 2
Show me how to use golang/oauth2 to authenticate with GitHub and then call the GitHub API to list a user's repositories.
Prompt 3
How do I use the golang/oauth2 library to automatically refresh an expired access token in my Go application?
Prompt 4
Using golang/oauth2, set up OAuth 2.0 authentication for a Go CLI tool that needs to access Google Drive on behalf of a user.

Frequently asked questions

What is oauth2?

The official Go library for OAuth 2.0, handles the sign-in-with-Google or connect-to-GitHub authentication flow, token management, and automatic token refresh for Go programs.

What language is oauth2 written in?

Mainly Go. The stack also includes Go.

What license does oauth2 use?

Part of the official Go extended standard library, specific license not stated in the explanation.

How hard is oauth2 to set up?

Setup difficulty is rated moderate, with roughly 30min to a first successful run.

Who is oauth2 for?

Mainly developer.

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