generated: '2026-07-19'
method: searched
source: https://help.learnosity.com/hc/en-us/categories/16266193425053-Developer-Documentation
summary: >-
  Most of the Learnosity platform is delivered as embeddable client-side components, not
  as server-side REST resources. Each "API" below is a JavaScript library loaded from a
  versioned Learnosity CDN URL, initialized with a server-signed options object, and
  rendered into a DOM element in the host application. This is the primary integration
  surface; the Data API is the server-side complement.
loader_pattern:
  script_tag: <script src="https://items.learnosity.com/?v2026.2.LTS"></script>
  global_object: LearnosityItems (one global per component family)
  init_call: LearnosityItems.init(signedInitOptions)
  mount_element: a div in the host page, e.g. <div id="learnosity_assess"></div>
  version_pinning: Pin a specific LTS version in production. See lifecycle/learnosity-lifecycle.yml.
families:
- family: Assessment delivery
  components:
  - name: Items API
    global: LearnosityItems
    host: https://items.learnosity.com
    description: >-
      Renders and runs an assessment (the assessment player) from an Activity in the Item
      bank, handling navigation, save/resume, response storage and submission.
    docs: https://help.learnosity.com/hc/en-us/categories/16534045857949-Items-API-Initialization-Options
  - name: Assess API
    global: LearnosityAssess
    host: https://assess.learnosity.com
    description: >-
      The assessment player layer used by Items API in `assess` rendering mode; can be
      driven directly for bespoke player experiences.
    docs: https://help.learnosity.com/hc/en-us/categories/16534105833373-Assess-API-Initialization-Options
  - name: Questions API
    global: LearnosityApp
    host: https://questions.learnosity.com
    description: >-
      Renders individual Questions and Features inline, without the surrounding
      assessment player - the lowest-level rendering component.
    docs: https://help.learnosity.com/hc/en-us/categories/16534061467933-Questions-API-Initialization-Options
- family: Authoring
  components:
  - name: Author API
    global: LearnosityAuthor
    host: https://authorapi.learnosity.com
    description: >-
      Full authoring environment - browse, create and edit Items, Questions, Features and
      Activities in the Item bank.
    docs: https://help.learnosity.com/hc/en-us/categories/16534074620189-Author-API-Initialization-Options
  - name: Question Editor API
    global: LearnosityQuestionEditor
    host: https://questioneditor.learnosity.com
    description: >-
      The single-Question editing widget, embeddable on its own inside a custom authoring UI.
    docs: https://help.learnosity.com/hc/en-us/categories/16534061255965-Question-Editor-API-Initialization-Options
  - name: Rubric Editor API
    global: LearnosityRubricEditor
    description: Embeddable editor for scoring rubrics.
    docs: https://help.learnosity.com/hc/en-us/sections/29580279641501-Rubric-Editor-API
- family: AI-enriched
  components:
  - name: Author Aide API
    global: LearnosityAuthorAide
    description: AI-assisted authoring component for generating and improving assessment content.
    docs: https://help.learnosity.com/hc/en-us/categories/19776607605789-Author-Aide-API-Initialization-Options
    getting_started: https://help.learnosity.com/hc/en-us/articles/19751636225181-Getting-started-with-the-Author-Aide-API
  - name: Feedback Aide
    global: LearnosityFeedbackAide
    description: >-
      Embeddable AI scoring and feedback surface for open-response work, exposed through
      feedbackSession / feedbackSessionUI configuration.
    docs: https://help.learnosity.com/hc/en-us/categories/22502911016989-Feedback-Aide
- family: Grading and review
  components:
  - name: Grading API
    global: LearnosityGrading
    description: Embeddable manual grading UI for scoring learner responses.
    docs: https://help.learnosity.com/hc/en-us/categories/19985132524957-Grading-API-Initialization-Options
    getting_started: https://help.learnosity.com/hc/en-us/articles/25283285367453-Getting-started-with-the-Grading-API
  - name: Annotations API
    description: >-
      Adds annotation and markup capability (highlighting, notes) over assessment content.
    docs: https://help.learnosity.com/hc/en-us/categories/16534076465693-Annotations-API-Initialization-Options
- family: Reporting and events
  components:
  - name: Reports API
    global: LearnosityReports
    host: https://reports.learnosity.com
    description: >-
      Renders prebuilt learner and aggregate reports (individual reports, live progress,
      learner-centric reports) into the host page.
    docs: https://help.learnosity.com/hc/en-us/categories/16534075019677-Reports-API-Initialization-Options
  - name: Events API
    global: LearnosityEvents
    host: https://events.learnosity.com
    description: >-
      Real-time client-side event channel used for live progress monitoring across
      in-flight assessment sessions.
    docs: https://help.learnosity.com/hc/en-us/categories/16534106856221-Events-API-Initialization-Options
extensibility:
- name: Custom Question types / custom Features
  repository: https://github.com/Learnosity/custom-questions-skeleton
  description: Skeleton project for building bespoke Question and Feature types on the Learnosity APIs.
- name: Learnosity API CSS
  repository: https://github.com/Learnosity/learnosity-apis-css
  description: The stylesheets for the Learnosity client-side APIs, published for theming.
- name: i18n language bundles
  repository: https://github.com/Learnosity/learnosity-i18n
  description: Localization bundles for the Learnosity client-side APIs.