# CSS (Cascading Style Sheets)

**Canonical:** https://apis.io/providers/css/  
**Website:** https://www.w3.org/Style/CSS/  
**APIs profiled:** 0

Cascading Style Sheets (CSS) is a W3C web standard for describing the presentation of documents written in HTML and XML, including layout, colors, typography, and animations. CSS is a foundational web technology defined by the W3C CSS Working Group and is implemented natively by every major web browser. The CSS Object Model (CSSOM) and CSS Houdini extensibility APIs expose CSS to JavaScript at runtime.

## Kin Score — 10.0 / 100 (minimal)

Scored 2026-08-30 under rubric 0.17.2. Trend: flat (+0.0 from 10.0).

| Facet | Score |
|---|---|
| Discoverability | 50.0 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 5.3 |
| Developer Ergonomics | 21.4 |
| Commercial Clarity | 0.0 |
| Access Clarity | 0.0 |

## Agent readiness — 0.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## Security (1)

- **Css Domain Security** — TLSv1.3 · HSTS · DMARC

## Tags

CSS, Web Standards, W3C, Styling, Browser

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