HexQuarter

Bitcoin & Nostr Engineering Firm.

We build software where Bitcoin serves as a foundation, with Nostr as the data fabric, and self-custody as the architecture default.

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Editorial Articles Media Highlights

by HexQuarter

May 26 2026
Cover image for DApps shouldn't need API keys

DApps shouldn't need API keys

Building decentralized apps shouldn't mean trusting a centralized API.

by HexQuarter

March 2 2026 · Edited Mar 2, 2026
Cover image for Building on Nostr: Why the future of Decentralized Apps is Bitcoin + Open Protocols

Building on Nostr: Why the future of Decentralized Apps is Bitcoin + Open Protocols

by HexQuarter

February 3 2026 · Edited Feb 3, 2026
Cover image for A new era for Bitcoin Development

A new era for Bitcoin Development

Bitcoin’s app stack has matured fast: payments, programmability, execution, indexing, and contract layers now exist as production-ready building blocks.