# Arc (The Browser Company)

**Canonical:** https://apis.io/providers/arc-browser/  
**Website:** https://arc.net/  
**APIs profiled:** 5

Arc is a Chromium-based alternative web browser from The Browser Company, organized around Spaces, Profiles, Split View, Boosts (user-authored CSS/JS overlays), Easels, Notes, and Arc Search on mobile. Arc is primarily a consumer product without a broad public developer REST API. Developer surface area is limited to Developer Mode in the desktop browser, the underlying Chromium extension model, and user-created Boosts. The company has signalled that Arc's active product investment is winding down in favor of the successor product, Dia.

## Kin Score — 18.0 / 100 (emerging)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 18.0).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 21.1 |
| Developer Ergonomics | 2.4 |
| Commercial Clarity | 36.8 |
| Access Clarity | 36.8 |

## Agent readiness — 3.0 (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 | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Free — onboarding: unknown, pricing: free, trial: no (confidence: medium).

## APIs (5)

- **Arc Browser (Desktop)** — Desktop browser for macOS and Windows, organized around Spaces, Profiles, Tabs, Split View, and Themes. Built on Chromium.
- **Arc Search** — Mobile-first AI-augmented search and browsing experience that builds "Browse for Me" summary pages from a query. iOS and Android.
- **Arc Boosts** — User-authored CSS and JavaScript overlays that customize the look and behavior of any website inside Arc. Authored from inside the browser rather than via a public REST API; can...
- **Arc Chromium Extensions** — Arc inherits the Chromium / Chrome Web Store extension model, so any Manifest V3 extension can be installed. There is no Arc-specific extension API beyond Chromium.
- **Arc Developer Mode** — In-browser Developer Mode for engineers - exposes developer tools, extension management, and Portrait Mode for sharing in-progress work. Not a public API.

## Security (3)

- **Arc Browser Domain Security** — TLSv1.3 · HSTS · DMARC
- **Arc Browser Vulnerability Disclosure** — Hackerone · security.txt · contact published
- **Arc Browser Trust Center** — SOC 2, ISO 27001

## Plans (1)

- **Arc Browser Plans Pricing**

## Tags

Browser, Consumer, Chromium, Boosts, The Browser Company

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