Summary
Sets up OAuth providers to work with portless local dev URLs by switching from rejected .localhost subdomains to valid TLDs like .dev or .app. Google and Apple are the main culprits here, they reject .localhost in redirect URIs even though they allow bare localhost. The skill walks through configuring Google, Apple, Microsoft, Facebook, and GitHub with the right callback URLs, plus how to set NEXTAUTH_URL and similar vars so your auth library constructs URLs correctly. If you've ever hit "redirect_uri_mismatch" during local OAuth testing, this is the fix. Includes a table showing exactly which providers block what, which is honestly useful reference material on its own.
Install to Claude Code
npx -y skills add vercel-labs/portless --skill oauth --agent claude-codeInstalls into .claude/skills of the current project.
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belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →Plug Mailtrap into your AI workflow and let it handle the email.
Connect Mailtrap MCP →Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →Make coding agent sessions - Searchable, Shareable, Vendor-neutral & Scored.
Try For Free →Your agent targets a perfect 10 Code Health score. Deterministic. Every commit.
Try For Free →Integrate web data into your AI product. One API to scrape website & brand data.
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