Arc (The Browser Company)

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.

Arc (The Browser Company) publishes 5 APIs on the APIs.io network. Tagged areas include Browser, Consumer, Chromium, Boosts, and The Browser Company.

Arc (The Browser Company)’s developer surface includes engineering blog and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub

16.3/100 emerging ▬ flat Agent 3/100 human only Front door AI 1/6 silent Full breakdown ↓
scored 2026-09-25 · rubric v0.23.0

AccessFree

4 APIs1 Not an API

Browser Consumer ChromiumBoostsThe Browser Company

Kin Score

Kin Score How this is scored →
scored 2026-09-25 · rubric v0.23.0

Composite quality — 16.3/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 0.4 / 17

Access Clarity 5.9 / 17

Operational Transparency 2.1 / 11

Contract Governance 0.0 / 10

Discoverability 5.3 / 9

Regulatory Posture 2.5 / 15

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 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 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

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/.

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 github.com/api-evangelist/arc-browser: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 5

Individual APIs this provider publishes. MODELED: a real API behind a partner or contract gate; there is no public reference, so API Evangelist drew its shape. NOT AN API: a product area with no API behind it, not counted.

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.

NOT AN API

Pricing Plans 1

Published pricing tiers and plan structures.

Arc Browser Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Arc Browser Rate Limits

2 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Arc Browser Finops

FINOPS

Security Posture 3

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

Arc Browser Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Arc Browser Vulnerability Disclosure

Hackerone · security.txt · contact published

SECURITY

Arc Browser Trust Center

SOC 2, ISO 27001

SECURITY

Resources

Access & Security 3

Authentication, authorization, and security posture

TrustCenter

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Company 4

The organization behind the API

Website

Website

LinkedIn

Twitter

Twitter

Blog

Blog

Other 2

Properties that don't map to a standard resource type

Company

Company

ResourceCenter

ResourceCenter

Source (apis.yml)

aid: arc-browser
url: https://raw.githubusercontent.com/api-evangelist/arc-browser/refs/heads/main/apis.yml
name: Arc (The Browser Company)
kind: company
description: 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.
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: free
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Free
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/arc-browser.png
tags:
- Browser
- Consumer
- Chromium
- Boosts
- The Browser Company
created: '2026-05-23'
modified: '2026-05-23'
specificationVersion: '0.23'
apis:
- aid: arc-browser:desktop
  name: Arc Browser (Desktop)
  description: Desktop browser for macOS and Windows, organized around Spaces, Profiles, Tabs, Split View, and Themes. Built
    on Chromium.
  humanURL: https://arc.net/
  tags:
  - Desktop
  - macOS
  - Windows
  properties:
  - type: Website
    url: https://arc.net/
- aid: arc-browser:search
  name: Arc Search
  description: Mobile-first AI-augmented search and browsing experience that builds "Browse for Me" summary pages from a query.
    iOS and Android.
  humanURL: https://arc.net/search
  baseURL: https://arc.net/search
  tags:
  - Mobile
  - Search
  - Artificial Intelligence
  tags_raw:
  - Mobile
  - Search
  - AI
  properties:
  - type: Website
    url: https://arc.net/search
- aid: arc-browser:boosts
  name: Arc Boosts
  description: 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 be shared via Boost links.
  humanURL: https://arc.net/boosts
  baseURL: https://arc.net/boosts
  tags:
  - Customization
  - CSS
  - JavaScript
  properties:
  - type: Website
    url: https://arc.net/boosts
- aid: arc-browser:extensions
  name: Arc Chromium Extensions
  description: 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.
  humanURL: https://chromewebstore.google.com/
  baseURL: https://chromewebstore.google.com/
  tags:
  - Extensions
  - Chromium
  properties:
  - type: Website
    url: https://chromewebstore.google.com/
- aid: arc-browser:developer-mode
  x-published: false
  name: Arc Developer Mode
  description: In-browser Developer Mode for engineers - exposes developer tools, extension management, and Portrait Mode
    for sharing in-progress work. Not a public API.
  humanURL: https://resources.arc.net/
  baseURL: https://resources.arc.net/
  tags:
  - Developer Tools
  properties:
  - type: Website
    url: https://resources.arc.net/
common:
- type: TrustCenter
  url: security/arc-browser-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/arc-browser-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/arc-browser-domain-security.yml
- type: Website
  url: https://arc.net/
- type: Company
  url: https://thebrowser.company/
- type: ResourceCenter
  url: https://resources.arc.net/
- type: LinkedIn
  url: https://www.linkedin.com/company/the-browser-company
- type: Twitter
  url: https://twitter.com/browsercompany
- type: Blog
  url: https://arc.net/blog
integrations:
- name: Chromium Extensions
- name: Notion
- name: Linear
- name: GitHub
- name: Figma
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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