High-intent workflow

OAuth Callback Testing on localhost

Test OAuth redirect and callback flows for Google, GitHub, and custom IdPs without repeated staging deploys.

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Who this is for

App teams integrating social login and identity provider callbacks.

Primary keyword

oauth callback localhost

Verification checkpoint

Register exact callback URLs and enforce state parameter validation.

Quick start pattern

Command

instatunnel --port 3000 --subdomain oauth-dev

Public endpoint example

https://oauth-dev.instatunnel.my/auth/callback
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OAuth Callback Testing on localhost | InstaTunnel