PlaceKitten

Placeholder kitten image service. Free, no-auth REST contract: /{width}/{height} for color, /g/{width}/{height} for grayscale. Created by Mark James, inspired by placehold.it.

PlaceKitten publishes 1 API contract indexed on the APIs.io network: Image API. Tagged areas include Animals, Public APIs, Placeholder, Image, and Deprecated.

The PlaceKitten catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

🌐 Visit website 📡 Profile data on GitHub

23.8/100 emerging ▬ flat Agent 21/100 agent aware Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 published contract

Animals Public APIs Placeholder Image Deprecated

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 23.8/100 · emerging

Contract Quality 12.5 / 21

Developer Ergonomics 0.8 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 2.8 / 10

Discoverability 4.7 / 9

Regulatory Posture 1.6 / 15

Agent readiness — 21/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 9 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 7 / 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 4 / 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

MCP Tool Quality 6 / 6

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 does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

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/placekitten/"><img src="https://apis.io/badge/placekitten/card.svg" alt="PlaceKitten 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):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

7 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 0.0 — up to +20.0 composite points
Developer Ergonomics scores 4.8 — up to +19.0 composite points
Operational Transparency scores 0.0 — up to +13.0 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/placekitten/apis.yml: open an issue on github.com/api-evangelist/placekitten 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 →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

APIs 1

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

PlaceKitten Image API

Placeholder image retrieval

Open Collections 2

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

PlaceKitten Image API

OPEN COLLECTION

PlaceKitten

OPEN COLLECTION

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Placekitten Context

2 classes · 6 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

PlaceKitten — jsonschema rules

5 rules · 3 warnings 2 info

SPECTRAL

PlaceKitten API Rules

6 rules · 3 errors 3 warnings

SPECTRAL

JSON Schema 2

Standalone JSON Schema definitions for this provider's data models.

PlaceKittenImageRequest

3 properties

JSON SCHEMA

PlaceKittenImageResponse

5 properties

JSON SCHEMA

JSON Structure 1

JSON Structure definitions describing this provider's data shapes.

Placekitten Image Request Structure

0 properties

JSON STRUCTURE

Examples 3

Example request and response payloads for these APIs.

Placekitten Getgrayscalekittenimage Example

4 fields

EXAMPLE

Placekitten Getkittenimage Example

4 fields

EXAMPLE

Placekitten Html Embed Example

3 fields

EXAMPLE

Security Posture 1

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

Placekitten Domain Security

TLSv1.3

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Placekitten Agentic Access

2 operations

2 operations · 0 acting

AGENTIC

Resources

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

PublicAPIsListing

PublicAPIsListing

Archive

Source (apis.yml)

aid: placekitten
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: true
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - openapi
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/placekitten.png
name: PlaceKitten
description: 'Placeholder kitten image service. Free, no-auth REST contract: /{width}/{height} for color, /g/{width}/{height}
  for grayscale. Created by Mark James, inspired by placehold.it.'
url: https://placekitten.com/
specificationVersion: '0.23'
created: '2026-05-28'
modified: '2026-05-30'
x-source: public-apis/public-apis
x-category: Animals
x-tier: 3
x-tier-reason: bulk-registered-from-public-apis
x-type: opensource
x-status: deprecated
x-status-checked: '2026-05-30'
x-status-evidence: HTTPS probe of https://placekitten.com/, /200/300, and /g/200/300 returned Cloudflare HTTP 521 (web server
  is down). DNS still resolves to Cloudflare edge IPs but the origin appears offline.
x-recommended-alternatives:
- picsum.photos
- placedog.net
- https://place-hold.it
tags:
- Animals
- Public APIs
- Placeholder
- Image
- Deprecated
tags_raw:
- Animals
- Public APIs
- Placeholder
- Images
- Deprecated
apis:
- aid: placekitten:placekitten-image-api
  name: PlaceKitten Image API
  description: Placeholder image retrieval
  humanURL: https://placekitten.com/
  tags:
  - Image
  properties:
  - type: OpenAPI
    url: openapi/placekitten-image-api-openapi.yml
  - type: Documentation
    url: https://placekitten.com/
  - type: JSONSchema
    url: json-schema/placekitten-image-request-schema.json
  - type: JSONSchema
    url: json-schema/placekitten-image-response-schema.json
  - type: JSONStructure
    url: json-structure/placekitten-image-request-structure.json
  - type: JSONLD
    url: json-ld/placekitten-context.jsonld
  - type: SpectralRules
    url: rules/placekitten-rules.yml
  - type: Vocabulary
    url: vocabulary/placekitten-vocabulary.yml
  - type: Examples
    url: examples/placekitten-getKittenImage-example.json
  - type: Examples
    url: examples/placekitten-getGrayscaleKittenImage-example.json
  - type: Examples
    url: examples/placekitten-html-embed-example.json
  - type: Archive
    url: https://web.archive.org/web/2023/https://placekitten.com/
common:
- type: AgenticAccess
  url: agentic-access/placekitten-agentic-access.yml
- type: DomainSecurity
  url: security/placekitten-domain-security.yml
- type: Website
  url: https://placekitten.com/
- type: PublicAPIsListing
  url: https://github.com/public-apis/public-apis
- type: Archive
  url: https://web.archive.org/web/*/placekitten.com
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

PlaceKitten API — frequently asked questions

Does PlaceKitten have an API?

Yes. APIs.io lists 1 API from PlaceKitten, including PlaceKitten Image API.

Is there an OpenAPI specification for the PlaceKitten API?

Yes. APIs.io indexes 1 OpenAPI specification for PlaceKitten, each linked for download from this page.

Is the PlaceKitten API ready for AI agents?

PlaceKitten has a Kin Score of 23.8 out of 100 (emerging) and an Agent Readiness score of 20.5 (agent-aware), scored by API Evangelist on 2026-11-06.

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/placekitten"

All providers

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

Every operation they expose

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

How their score was established

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

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

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.