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) is listed with 4 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 11 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

11.7/100 emerging ▬ flat Agent 1/100 human only Front door AI 1/6 silent Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFree

4 APIs1 Not an API

Browser Consumer Chromium BoostsThe Browser Company

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 11.7/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 0.4 / 17

Access Clarity 2.2 / 17

Operational Transparency 1.7 / 11

Contract Governance 0.0 / 10

Discoverability 5.3 / 9

Regulatory Posture 2.5 / 15

Agent readiness — 1/100 · 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

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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/.

Show this score on your site.

It updates itself when the score changes. Paste this where you link to your API docs:

<a href="https://apis.io/providers/arc-browser/"><img src="https://apis.io/badge/arc-browser/card.svg" alt="Arc (The Browser Company) on APIs.io — Kin Score by API Evangelist"></a>

Other styles, a README pill and a shields.io endpoint are on the badge page.

Raise your score.

Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes

12 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 0.0 — up to +25.0 composite points
Developer Ergonomics scores 2.4 — up to +19.5 composite points
Access Clarity scores 13.2 — up to +17.4 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/arc-browser/apis.yml: open an issue on github.com/api-evangelist/arc-browser to ask a question or point us at an artifact you publish. 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

Arc (The Browser Company) API pricing

Not yet checked against Arc (The Browser Company)'s own pricing page. Compiled by API Evangelist on 2026-05-22; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Free freemium	Free

Plan details, limits and sources →

Rate limits

Free Tier Default: 10 requests per minute
Pro Tier Default: 120 requests per minute

Compiled by API Evangelist, not yet checked against Arc (The Browser Company)'s documentation. Rate-limit details →

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

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

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: low
  source:
  - plans
  - security
  generated: '2026-11-06'
  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: Plans
  url: plans/arc-browser-plans-pricing.yml
- type: RateLimits
  url: rate-limits/arc-browser-rate-limits.yml
- type: FinOps
  url: finops/arc-browser-finops.yml
- 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

Arc (The Browser Company) API — frequently asked questions

Does Arc (The Browser Company) have an API?

Yes. APIs.io lists 5 APIs from Arc (The Browser Company), including Arc Browser (Desktop), Arc Search and Arc Boosts, and 2 more.

How much does the Arc (The Browser Company) API cost?

APIs.io lists 1 pricing plan for Arc (The Browser Company), with each plan's price, limits and inclusions under Pricing on this page.

Is the Arc (The Browser Company) API ready for AI agents?

Arc (The Browser Company) has a Kin Score of 11.7 out of 100 (emerging) and an Agent Readiness score of 0.6 (human-only), scored by API Evangelist on 2026-11-06.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/arc-browser"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/arc-browser/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/arc-browser/evidence"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.