Block Protocol – an open standard for data-driven blocks
A standardized way to create blocks whose contents are mapped to schemas, which are both human and machine-readable.
Categories:
The Block Protocol is an open standard for building, using, and embedding interoperable data-driven blocks that extend web application interfaces without silos.
🚀 Overview
The Block Protocol (Þ) defines how frontend components called "blocks" communicate with hosting applications, enabling any block to work seamlessly in any supporting app. Blocks are modular UI elements that display and edit structured data, from simple text to complex charts or AI integrations.
It solves the problem of siloed blocks locked to specific apps (e.g., Notion, Figma), forcing redundant development. By standardizing communication, it creates an ecosystem where blocks are reusable across the web, reducing dev time and empowering users with specialized tools.
Built for application developers (to add extensibility), block developers (for broad distribution via Þ Hub), and end-users (for powerful, consistent components). Developed by HashIntel to foster open collaboration and infinite UI customization.
✨ Key Features
- Interoperability: Blocks work out-of-the-box in any Þ-supporting app like HASH, WordPress (via plugin), without custom integration.
- Þ Hub: Central registry to browse, publish, and embed 50+ blocks (e.g., AI Chat, Kanban, Charts, OpenAI integration).
- Modular Architecture: Core, Graph (data storage), Hook (app capabilities), Type System (semantic data validation via WASM), Service (zero-knowledge API calls).
- Framework Agnostic: Build with React, Vue, Angular, Web Components, TypeScript, or HTML.
- Upcoming: Actions, Comments, Styling modules; v0.4 in development (as of 2024).
🛠 Tech Stack
- Frontend: TypeScript (monorepo), React/Vue/Angular/Web Components for blocks
- Backend: Protocol-focused (no central backend); Rust/WASM for type system
- Database: Host app-dependent (e.g., Graph module for local/remote data)
- Auth: Custom / Host app (e.g., WordPress)
- Hosting: Self-hosted, WordPress plugin, Vercel-compatible (HASH app)
👥 Who Is This For?
This project is useful for:
- Developers who want to build once, embed anywhere with reusable blocks
- Teams looking for infinite extensibility without rebuilding UIs
- Indie makers building modular apps like dashboards, editors, or CMS
📸 Screenshots / Demo
- Live demo: https://blockprotocol.org/hub
- GitHub: https://github.com/blockprotocol/blockprotocol
🔥 Project Status
- 🟢 Actively building
Last updated: 2026-03-24
❓ FAQ
Is this project free?
Yes / Open Source (Fully free, dual-licensed MIT/Apache 2.0; no costs for use or publishing blocks.)
Is the source code available?
Yes — https://github.com/blockprotocol/blockprotocol
Can I contribute?
Yes — Fork the repo, open issues/PRs, propose RFCs in /rfcs/, build/publish blocks to Þ Hub, or join discussions. See CONTRIBUTING.md for setup with mise/Yarn/Turbo.
📬 Contact & Links
- Website: https://blockprotocol.org
- GitHub: https://github.com/blockprotocol/blockprotocol
- Twitter/X: https://x.com/blockprotocol
- Email: support@blockprotocol.org
Built with ❤️ and kept warm on WarmIndex.
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