# Steel

**Canonical:** https://apis.io/providers/steel-dev/  
**Website:** https://steel.dev  
**APIs profiled:** 4

Steel is the open-source browser API for AI agents and apps. The Steel Cloud REST API (https://api.steel.dev/v1) launches and manages cloud browser sessions, runs stateless quick actions (scrape, screenshot, pdf, search), and exposes a live session viewer, while long-running automation connects to a per-session Chrome DevTools Protocol (CDP) WebSocket driven with Playwright, Puppeteer, or Selenium. The same surface ships self-hosted under Apache-2.0 as steel-browser.

## Kin Score — 36.4 / 100 (thin)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 36.4).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 49.5 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 34.2 |
| Developer Ergonomics | 21.4 |
| Commercial Clarity | 39.5 |
| Access Clarity | 39.5 |

## Agent readiness — 19.8 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| 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

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (4)

- **Steel Files API** — Manage files inside a session's browser context.
- **Steel Quick Actions API** — Stateless one-off scrape, screenshot, PDF, and search.
- **Steel Session Actions API** — Scrape, screenshot, and PDF the page in a running session.
- **Steel Sessions API** — Launch, inspect, and release cloud browser sessions.

## Agentic access (1)

- **Steel Dev Agentic Access** — 17 operations · 12 acting

## Security (2)

- **Steel Dev Authentication** — apiKey · 1 scheme
- **Steel Dev Domain Security** — TLSv1.3 · HSTS

## Plans (1)

- **Steel Dev Plans Pricing**

## Tags

Browser, Web Automation, Scraping, AI Agents, Open-Source

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