Desmos

Desmos (Desmos Studio PBC) is the dead-simple way to embed rich, interactive math into a web page or web app. Its developer product is not a REST API but a client-side JavaScript library that mounts embeddable calculators — a full-featured Graphing Calculator, a 3D Calculator, and Geometry, Scientific, and Four-Function calculators — controlled through a browser object model (expressions, graph state, screenshots, and events). The API loads via a single versioned script include and authenticates with an API key passed as a URL parameter. Founded in 2011 by Eli Luberoff and originally backed by GV, the world-renowned Desmos calculators now operate as an independent public benefit corporation and remain free to all, while the Desmos curriculum business was acquired by Amplify in 2022.

Desmos publishes 1 API on the APIs.io network. Tagged areas include Company, Consumer, Education, Mathematics, and Graphing Calculator.

Desmos’ developer surface includes documentation, API reference, getting-started guide, signup flow, changelog, engineering blog, authentication, and 12 more developer resources.

🌐 Visit website 📡 Source on GitHub

32.3/100 thin Agent 10/100 human only Full breakdown ↓
scored 2026-07-20 · rubric v0.4

1 APIs 0 Features

CompanyConsumerEducationMathematicsGraphing CalculatorEmbeddableJavaScriptEdTechData Visualization

API Rating

API Evangelist Rating How this is scored →
scored 2026-07-20 · rubric v0.4

Composite quality — 32.3/100 · thin

Contract Quality 0.0 / 25

Developer Ergonomics 10.9 / 20

Commercial Clarity 6.8 / 20

Operational Transparency 5.8 / 13

Governance 0.0 / 12

Discoverability 8.8 / 10

Agent readiness — 10/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/desmos: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

GettingStarted

SignUp

Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

Components

Components

Lifecycle

Lifecycle

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

StatusPage

StatusPage

Deprecation

Deprecation

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: desmos
name: Desmos
description: Desmos (Desmos Studio PBC) is the dead-simple way to embed rich, interactive math into a web page or web app.
  Its developer product is not a REST API but a client-side JavaScript library that mounts embeddable calculators — a full-featured
  Graphing Calculator, a 3D Calculator, and Geometry, Scientific, and Four-Function calculators — controlled through a browser
  object model (expressions, graph state, screenshots, and events). The API loads via a single versioned script include and
  authenticates with an API key passed as a URL parameter. Founded in 2011 by Eli Luberoff and originally backed by GV, the
  world-renowned Desmos calculators now operate as an independent public benefit corporation and remain free to all, while
  the Desmos curriculum business was acquired by Amplify in 2022.
url: https://raw.githubusercontent.com/api-evangelist/desmos/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- gv
x-tier: profiled
x-tier-reason: enriched
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Consumer
- Education
- Mathematics
- Graphing Calculator
- Embeddable
- JavaScript
- EdTech
- Data Visualization
apis:
- name: Desmos API
  description: Client-side JavaScript API for embedding interactive Desmos calculators (Graphing, 3D, Geometry, Scientific,
    Four-Function) into web pages and apps, controlled through a browser object model.
  humanURL: https://www.desmos.com/api/v1.12/docs/index.html
  baseURL: https://www.desmos.com/api/v1.12/
  properties:
  - type: Documentation
    url: https://www.desmos.com/api/v1.12/docs/index.html
  - type: APIReference
    url: https://www.desmos.com/api/v1.12/docs/index.html
  - type: Components
    url: components/desmos-components.yml
  - type: Authentication
    url: authentication/desmos-authentication.yml
  - type: Sandbox
    url: sandbox/desmos-sandbox.yml
  - type: ChangeLog
    url: changelog/desmos-changelog.yml
  - type: Lifecycle
    url: lifecycle/desmos-lifecycle.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.desmos.com
- type: DeveloperPortal
  url: https://www.desmos.com/api
- type: Documentation
  url: https://www.desmos.com/api/v1.12/docs/index.html
- type: APIReference
  url: https://www.desmos.com/api/v1.12/docs/index.html
- type: GettingStarted
  url: https://www.desmos.com/api/v1.12/docs/index.html
- type: SignUp
  url: https://www.desmos.com/my-api
- type: ChangeLog
  url: https://www.desmos.com/api/changelog
- type: StatusPage
  url: https://status.desmos.com
- type: Deprecation
  url: lifecycle/desmos-lifecycle.yml
- type: TermsOfService
  url: https://www.desmos.com/api-terms
- type: PrivacyPolicy
  url: https://www.desmos.com/privacy
- type: Blog
  url: https://blog.desmos.com
- type: GitHubOrganization
  url: https://github.com/desmosinc
- type: Components
  url: components/desmos-components.yml
- type: Authentication
  url: authentication/desmos-authentication.yml
- type: Sandbox
  url: sandbox/desmos-sandbox.yml
- type: Lifecycle
  url: lifecycle/desmos-lifecycle.yml
- type: DomainSecurity
  url: security/desmos-domain-security.yml
- type: LLMsTxt
  url: llms/desmos-llms.txt
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence