Leap Motion

LeapC Tracking API

LeapC is the native C API for Ultraleap / Leap Motion hand tracking. A client opens a LEAP_CONNECTION to the locally running Ultraleap Hand Tracking Service and drives a message pump with LeapPollConnection(), receiving tracking events (LEAP_TRACKING_EVENT with LEAP_HAND / LEAP_PALM / LEAP_DIGIT / LEAP_BONE), device events, image frames, policy and configuration responses. It is the layer the Unity, Unreal, OpenXR and Python bindings are built on. There is no hosted HTTP base URL — the transport is local IPC to the tracking service.

GitHub

Documentation

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Documentation
https://docs.ultraleap.com/api-reference/tracking-api/leapc-guide.html
📖
APIReference
https://docs.ultraleap.com/api-reference/tracking-api/api-reference.html

Other Resources

🔗
Examples
https://docs.ultraleap.com/api-reference/tracking-api/examples.html
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ErrorCatalog
https://raw.githubusercontent.com/api-evangelist/leap-motion/refs/heads/main/errors/leap-motion-error-codes.yml
🔗
DataModel
https://raw.githubusercontent.com/api-evangelist/leap-motion/refs/heads/main/data-model/leap-motion-data-model.yml
🔗
Conventions
https://raw.githubusercontent.com/api-evangelist/leap-motion/refs/heads/main/conventions/leap-motion-conventions.yml
🔗
APIsJSON
https://raw.githubusercontent.com/api-evangelist/leap-motion/refs/heads/main/apis.yml

API entry from apis.yml

apis.yml Raw ↑ 
aid: leap-motion:leapc-tracking-api
name: LeapC Tracking API
description: LeapC is the native C API for Ultraleap / Leap Motion hand tracking. A client opens a LEAP_CONNECTION
  to the locally running Ultraleap Hand Tracking Service and drives a message pump with LeapPollConnection(),
  receiving tracking events (LEAP_TRACKING_EVENT with LEAP_HAND / LEAP_PALM / LEAP_DIGIT / LEAP_BONE),
  device events, image frames, policy and configuration responses. It is the layer the Unity, Unreal,
  OpenXR and Python bindings are built on. There is no hosted HTTP base URL — the transport is local IPC
  to the tracking service.
humanURL: https://docs.ultraleap.com/api-reference/tracking-api/index.html
tags:
- Hand Tracking
- Native API
- C
properties:
- type: Documentation
  url: https://docs.ultraleap.com/api-reference/tracking-api/leapc-guide.html
- type: APIReference
  url: https://docs.ultraleap.com/api-reference/tracking-api/api-reference.html
- type: Examples
  url: https://docs.ultraleap.com/api-reference/tracking-api/examples.html
- type: ErrorCatalog
  url: errors/leap-motion-error-codes.yml
- type: DataModel
  url: data-model/leap-motion-data-model.yml
- type: Conventions
  url: conventions/leap-motion-conventions.yml