seemoo-lab/openhaystack

Health v2 · maintenance only

Adoption not part of the score

13467 stars · 677 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

OpenHaystack is a framework and macOS application for creating custom Bluetooth tracking tags that leverage Apple's Find My (offline finding) network to report their location. It was built from a security analysis of Apple's Find My protocol and includes firmware for micro:bit and other BLE devices.

Use cases

• build my own airtag-like tracker
• track my keys or backpack with bluetooth
• integrate find my tracking into a custom device
• reverse engineer apple's find my network
• locate lost items without cellular coverage
• flash openhaystack firmware onto a micro:bit

When to choose

• you want an open-source, self-built alternative to AirTags using Apple's Find My network
• you're researching or learning how offline finding and BLE advertising work
• you want to embed tracking into your own Bluetooth-capable hardware

When to avoid

• you need a polished, production-ready tracker with anti-stalking protections
• you don't own a Mac, since the companion app is macOS-only
• you need rotating keys or complete firmware robustness, as the code is experimental and broadcasts a fixed public key

Facets

framework · maturity experimental

security cryptography reverse-engineering security privacy hardware apple-ecosystem reverse-engineering embedded find-my airtag bluetooth-tracking location-tracker offline-finding microbit ble-beacon bluetooth macos swift

Member repositories

For agents

markdown · JSON · MCP: product_card(name="seemoo-lab/openhaystack")