Handshake

Self-hosted app that handles OAuth authorization flows against 200+ APIs, deployable to Vercel in minutes.

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Handshake is a free, open-source, self-hosted Next.js app that handles OAuth authorization flows against over 200 third-party APIs, so a developer's app can acquire access tokens to a user's account elsewhere without implementing each provider's OAuth dance. It's distinct from sign-in libraries like next-auth or passport, focusing on authorization to other services rather than authenticating into your own app, and deploys to Vercel in about five minutes. It's built for developers building integrations that need user-authorized access to third-party APIs.

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Problem & pain-point mapping
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What it's a strong alternative to
Trust & credibility signals

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