# GeoCourier

> GeoCourier (定位郵差) is an iOS and Android app that sends every captured GPS location as a JSON HTTPS request to servers the user configures. There is no account and no GeoCourier server in between: you write the receiver.

To build or debug a receiver, read the payload spec. The Agent Skill packages the same spec with tested receiver examples and a test script for AI coding tools.

## Docs

- [Payload spec](https://tracker.iwi.tw/spec.md): request rules, every field with types and null rules, example payloads, receiver scenarios, receiver code in PHP, Node.js, Python and Go
- [Agent Skill](https://tracker.iwi.tw/skill/geocourier-receiver.zip): geocourier-receiver, a SKILL.md package for Claude Code, Claude.ai, Codex, GitHub Copilot and Cursor

## Optional

- [Spec page](https://tracker.iwi.tw/spec.html): the same spec for people, rendered with JavaScript