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 is listed with 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 13 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

31.3/100 thin ▬ flat Agent 3/100 human only saas Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 API

Company Consumer Education MathematicsGraphing CalculatorEmbeddable JavaScript EdTech Data Visualization

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 31.3/100 · thin

Contract Quality 0.0 / 21

Developer Ergonomics 10.1 / 17

Access Clarity 5.8 / 17

Operational Transparency 4.9 / 11

Contract Governance 0.0 / 10

Discoverability 5.6 / 9

Regulatory Posture 2.9 / 15

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

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

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

Regulatory Posture applies to this provider. Its tags matched the Education & Research regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Show this score on your site.

It updates itself when the score changes. Paste this where you link to your API docs:

<a href="https://apis.io/providers/desmos/"><img src="https://apis.io/badge/desmos/card.svg" alt="Desmos on APIs.io — Kin Score by API Evangelist"></a>

Other styles, a README pill and a shields.io endpoint are on the badge page.

Raise your score.

Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes

12 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 0.0 — up to +25.0 composite points
Access Clarity scores 34.2 — up to +13.2 composite points
Contract Governance scores 0.0 — up to +12.0 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/desmos/apis.yml: open an issue on github.com/api-evangelist/desmos to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Obsidian Community Plugins (third-party APIs the Obsidian plugin ecosystem integrates)	unknown	2.5 (thin)	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

Desmos API

Client-side JavaScript API for embedding interactive Desmos calculators (Graphing, 3D, Geometry, Scientific, Four-Function) into web pages and apps, controlled through a browser...

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Desmos Authentication

apiKey · 1 scheme

SECURITY

Desmos Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

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

Other 1

Properties that don't map to a standard resource type

ParentCompany

ParentCompany

Source (apis.yml)

aid: desmos
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  - sandbox
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/desmos.png
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: '0.23'
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: ParentCompany
  url: https://apis.io/providers/amplify/
  name: Amplify
  x-relationship: acquired
  x-evidence: 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
- 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

Desmos API — frequently asked questions

Does Desmos have an API?

Yes. APIs.io lists 1 API from Desmos, including Desmos API.

How do I authenticate with the Desmos API?

Desmos uses bearer-token authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Desmos Authentication.

Is the Desmos API ready for AI agents?

Desmos has a Kin Score of 31.3 out of 100 (thin) and an Agent Readiness score of 2.5 (human-only), scored by API Evangelist on 2026-10-31.

Work with this as data

Every provider 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 providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
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 provider

curl "https://apis.io/api/v1/providers/desmos"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/desmos/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/desmos/evidence"

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

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

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