Developers

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<CardGroup cols={3}> <Card href="/developers/extend/apps/getting-started" img="/images/user-guide/halftone/dev-apps.png"> <CardTitle>Apps</CardTitle> Extend Twenty with custom objects, server-side logic, UI components, and AI agents — all as TypeScript packages. </Card> <Card href="/developers/extend/api" img="/images/user-guide/halftone/dev-api.png"> <CardTitle>API</CardTitle> REST and GraphQL APIs, webhooks, and OAuth. </Card> <Card href="/developers/self-host/capabilities/docker-compose" img="/images/user-guide/halftone/dev-self-host.png"> <CardTitle>Self-Host</CardTitle> Run Twenty on your own infrastructure. </Card> <Card href="/developers/contribute/capabilities/local-setup" img="/images/user-guide/halftone/dev-contribute.png"> <CardTitle>Contribute</CardTitle> Set up the monorepo locally and submit PRs. </Card> </CardGroup>