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

📖
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
🔗
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

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API 
curl "https://apis.io/api/v1/apis/leapc-tracking-api"
All apis 
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no email required.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

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