Polotno

Polotno provides a powerful, open-source canvas library for building design tools and visual editors directly in the browser. It offers a flexible, component‑based architecture, extensive customization options, and a rich set of pre‑built UI elements, enabling developers to create sophisticated graphic applications without reinventing core drawing functionality. The library is actively maintained, supports modern web standards, and integrates seamlessly with React, Vue, and other frameworks, making it a versatile choice for both startups and enterprise projects seeking high‑performance, client‑side design capabilities.

Polotno is profiled on the APIs.io network. Tagged areas include Company, Canvas, DesignTools, OpenSource, and JavaScript.

Polotno’s developer surface includes pricing, documentation, changelog, engineering blog, getting-started guide, and 13 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

25.6/100 emerging Agent 21/100 agent aware Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

0 APIs

Company CanvasDesignToolsOpenSourceJavaScript

Kin Score

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

Composite quality — 25.6/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 5.3 / 17

Access Clarity 7.6 / 17

Operational Transparency 3.5 / 11

Contract Governance 0.0 / 10

Discoverability 4.1 / 9

Regulatory Posture 3.8 / 15

Agent readiness — 21/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 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 4 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 6 / 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 Horizontal (data, software, accessibility, platform) 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/.

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

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
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
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)

8 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
Developer Ergonomics scores 31.0 — up to +13.8 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/polotno/apis.yml: open an issue on github.com/api-evangelist/polotno 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 →

Security Posture 2

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

Polotno Domain Security

TLSv1.3 · DMARC

SECURITY

Polotno Vulnerability Disclosure

no policy recorded

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

Login

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Build 1

SDKs, sample code, and the tooling you integrate with

SDKs

SDKs

Access & Security 3

Authentication, authorization, and security posture

Security

Security

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Roadmap

Roadmap

ChangeLog

ChangeLog

Commercial 3

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Pricing

Pricing

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: polotno
name: Polotno
image: https://polotno.com/og/default.png
description: Polotno provides a powerful, open-source canvas library for building design tools and visual editors directly
  in the browser. It offers a flexible, component‑based architecture, extensive customization options, and a rich set of pre‑built
  UI elements, enabling developers to create sophisticated graphic applications without reinventing core drawing functionality.
  The library is actively maintained, supports modern web standards, and integrates seamlessly with React, Vue, and other
  frameworks, making it a versatile choice for both startups and enterprise projects seeking high‑performance, client‑side
  design capabilities.
url: https://raw.githubusercontent.com/api-evangelist/polotno/refs/heads/main/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-27 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-26'
modified: '2026-10-26'
tags:
- Company
- Canvas
- DesignTools
- OpenSource
- JavaScript
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: LLMsTxt
  url: llms/polotno-llms.txt
- type: WellKnown
  url: well-known/polotno-well-known.yml
- type: Hosts
  url: hosts/polotno-hosts.yml
- type: Vendors
  url: vendors/polotno-vendors.yml
- type: TermsOfService
  url: https://polotno.com/legal/terms-of-service
- type: Security
  url: https://polotno.com/legal/security
- type: SDKs
  url: https://polotno.com/sdk/product/pdf
- type: Roadmap
  url: https://community.polotno.com/c/roadmap/
- type: PrivacyPolicy
  url: https://polotno.com/legal/privacy
- type: Pricing
  url: https://polotno.com/sdk/pricing
- type: Login
  url: https://polotno.com/login
- type: Documentation
  url: https://polotno.com/docs/overview
- type: ChangeLog
  url: https://community.polotno.com/c/changelog/
- type: Blog
  url: https://polotno.com/blog
- type: GettingStarted
  url: https://community.polotno.com/c/ask/issues-getting-polotno-sdk-working-out-of-the-box-following-quick-start
- type: VulnerabilityDisclosure
  url: security/polotno-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/polotno-domain-security.yml
- type: Website
  url: https://polotno.com/
apis: []
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  detail: Polotno provides HTML documentation but no machine‑readable OpenAPI, GraphQL, AsyncAPI, gRPC or WSDL contracts were
    found.
  evidence:
  - url: https://polotno.com/openapi.json
    status: 404
  checked: '2026-10-27'
x-submission-probe: 200 2026-10-25
x-enrichment:
  date: '2026-10-27'
  status: enriched
  artifacts_added: 13
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

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