Leap Motion

aid: leap-motion
name: Leap Motion
description: 'Leap Motion is the hand-tracking company behind the Leap Motion Controller. It merged with Ultrahaptics in 2019
  to form Ultraleap, and the Leap Motion brand now continues as Ultraleap''s hardware line (Leap Motion Controller 2) and
  as the "Leap" naming across the tracking SDK. The developer surface is not a hosted web API: it is LeapC, a native C API
  that connects a local client to the Ultraleap Hand Tracking Service and delivers tracked hands, digits, bones, images and
  device events as polled messages, plus first-party plugins for Unity, Unreal, OpenXR and Python. The original leapmotion.com
  and developer.leapmotion.com domains no longer resolve; docs.ultraleap.com and github.com/ultraleap are the live developer
  surfaces.'
image: https://avatars.githubusercontent.com/u/51484212?v=4
url: https://raw.githubusercontent.com/api-evangelist/leap-motion/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
x-successor: Ultraleap
x-successor-url: https://www.ultraleap.com/
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Hand Tracking
- Computer Vision
- Spatial Computing
- Augmented Reality
- Virtual Reality
- XR
- Gesture Recognition
- SDK
- Hardware
- Human Computer Interaction
- OpenXR
apis:
- 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
- aid: leap-motion:tracking-websocket
  name: Ultraleap Tracking WebSocket
  description: An open-source WebSocket server from Ultraleap that restores the LeapJS-compatible websocket surface removed
    when Leap Motion Orion V4 was replaced by Ultraleap Gemini V5. It streams tracking data over the legacy LeapJS "v6" JSON
    protocol so browser applications can consume hand tracking. It runs locally alongside the tracking service; the endpoint
    is a loopback WebSocket, not a hosted API.
  humanURL: https://github.com/ultraleap/UltraleapTrackingWebSocket
  tags:
  - WebSocket
  - Streaming
  - Browser
  properties:
  - type: SourceCode
    url: https://github.com/ultraleap/UltraleapTrackingWebSocket
  - type: Documentation
    url: https://github.com/ultraleap/UltraleapTrackingWebSocket/blob/main/README.md
common:
- type: DomainSecurity
  url: security/leap-motion-domain-security.yml
- type: Website
  url: https://www.ultraleap.com/
- type: DeveloperPortal
  url: https://docs.ultraleap.com/
- type: Documentation
  url: https://docs.ultraleap.com/hand-tracking/index.html
- type: APIReference
  url: https://docs.ultraleap.com/api-reference/tracking-api/index.html
- type: GettingStarted
  url: https://docs.ultraleap.com/hand-tracking/getting-started.html
- type: Downloads
  url: https://www.ultraleap.com/downloads/
- type: Products
  url: https://www.ultraleap.com/products/
- type: Blog
  url: https://docs.ultraleap.com/ultralab/index.html
- type: GitHubOrganization
  url: https://github.com/ultraleap
- type: Support
  url: https://www.ultraleap.com/contact/
- type: Community
  url: https://discord.com/invite/3VCndThqxS
- type: TermsOfService
  url: https://www.ultraleap.com/legal/ultraleap-ltd-terms-conditions-of-business/
- type: PrivacyPolicy
  url: https://www.ultraleap.com/legal/privacy-policy/
- type: License
  url: https://www.ultraleap.com/legal/
- type: Compliance
  url: https://www.ultraleap.com/legal/
- type: ChangeLog
  url: https://docs.ultraleap.com/openxr/changelog/index.html
- type: ChangeLog
  url: changelog/leap-motion-changelog.yml
- type: Packages
  url: packages/leap-motion-packages.yml
- type: SDKs
  url: packages/leap-motion-packages.yml
- type: Conformance
  url: conformance/leap-motion-conformance.yml
- type: ErrorCatalog
  url: errors/leap-motion-error-codes.yml
- type: Lifecycle
  url: lifecycle/leap-motion-lifecycle.yml
- type: Conventions
  url: conventions/leap-motion-conventions.yml
- type: DataModel
  url: data-model/leap-motion-data-model.yml
- type: Components
  url: components/leap-motion-components.yml
- type: Sandbox
  url: sandbox/leap-motion-sandbox.yml
- type: LLMsTxt
  url: llms/leap-motion-llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io