# Cat Facts (catfact.ninja)

**Canonical:** https://apis.io/providers/cat-facts-catfact/  
**Website:** https://catfact.ninja/  
**APIs profiled:** 2

Cat Facts is a free, no-authentication community REST API at catfact.ninja that serves random cat trivia and a catalog of cat breeds. It exposes three documented endpoints — a single random fact, a paginated list of facts, and a paginated list of breeds — and ships a Swagger UI based OpenAPI 3.0 document at /docs. The service is widely used in API onboarding tutorials, demos, and sample apps because it requires no API key and returns small, predictable JSON payloads.

## Kin Score — 18.3 / 100 (emerging)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 18.3).

| Facet | Score |
|---|---|
| Discoverability | 75.9 |
| Contract Quality | 21.2 |
| Governance | 25.0 |
| Contract Governance | 25.0 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 11.9 |
| Commercial Clarity | 0.0 |
| Access Clarity | 0.0 |

## Agent readiness — 38.3 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | na |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | na |
| Error Semantics | no |
| OpenAPI Examples | verified |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | na |

## Access

Open access — onboarding: open, pricing: unknown, trial: no (confidence: medium).

## APIs (2)

- **Cat Facts (catfact.ninja) Breeds API** — Catalog of cat breeds with country, origin, coat, and pattern.
- **Cat Facts (catfact.ninja) Facts API** — Random cat trivia, individually or in paginated lists.

## Agentic access (1)

- **Cat Facts Catfact Agentic Access** — 3 operations

## Security (1)

- **Cat Facts Catfact Domain Security** — TLSv1.3

## Tags

Animals, Cats, Trivia, Public APIs, Community, No Authentication, REST

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/cat-facts-catfact/). Scores are computed from the provider's own public artifacts under a published rubric.