# Build with Humanity

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🔐 Looking for SSO? The React SDK is "Sign in with Humanity" — same OAuth pattern as Google or GitHub login, working integration in \~10 minutes\
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:arrow\_forward: [humanity-org-react-sdk](https://docs.humanity.org/build-with-humanity/build-with-the-sdk-api/humanity-org-react-sdk "mention")
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Humanity is an identity and verification layer you can add to web apps, mobile apps, and smart contracts.

<table data-card-size="large" data-view="cards"><thead><tr><th></th><th></th><th></th><th data-hidden data-card-cover data-type="image">Cover image</th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><h3><strong>SDK / API</strong> </h3></td><td><mark style="color:$primary;"><strong>For web, backend, and mobile applications</strong></mark></td><td>Human verification and much more via OAuth. React SDK, Connect SDK, and REST API.</td><td><a href="https://383350980-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FL1EBectYBMnvu9vU5N1M%2Fuploads%2FSXhHdNa7tDH1gk19LNft%2Foff-chain-cover.png?alt=media&#x26;token=b4f7d0b5-0dc6-46fd-abb1-e7993d0d9e2b">off-chain-cover.png</a></td><td><a href="build-with-humanity/build-with-the-sdk-api/sdk-quickstart">sdk-quickstart</a></td></tr><tr><td><h3>ON-CHAIN</h3></td><td><mark style="color:$primary;"><strong>For decentralized applications</strong></mark></td><td>Work directly in smart contracts using the Verification Oracle.</td><td><a href="https://383350980-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FL1EBectYBMnvu9vU5N1M%2Fuploads%2FEKqX6gyyj8nutNgZsS3P%2Fon-chain-cover.png?alt=media&#x26;token=b2602790-b79b-426a-ad70-3006287aadb7">on-chain-cover.png</a></td><td><a href="build-with-humanity/build-on-chain/on-chain-quick-start-guide">on-chain-quick-start-guide</a></td></tr></tbody></table>

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👀 Not sure where to start? Explore the [Demo Hub](https://demo.humanity.org/) to see what you can build with Humanity.
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