Virix Labs

Virix Labs is the trading name of Virix Ltd, a London software company (England & Wales no. 16325097, incorporated March 2025) that builds and operates Human Browser at humanbrowser.cloud: a hosted "cloud Chromium for AI agents" that runs a natural-language browser goal on a residential IP behind a live viewer a person can watch and take over, with CAPTCHA handling, persistent per-token cookie profiles and metered prepaid pricing ($0.10 per browser-minute, $4/GB bandwidth, $0.005 per solved CAPTCHA). The same runtime is exposed four ways: an A2A 0.3.0 agent card at /.well-known/agent-card.json with nine skills and a JSON-RPC endpoint at agent.humanbrowser.cloud/a2a; a Model Context Protocol server both hosted (agent.humanbrowser.cloud/mcp, with RFC 9728 protected-resource and RFC 8414 authorization-server metadata) and shipped as a stdio server in the npm package @virixlabs/humanbrowser; a six-operation OpenAPI 3.1.0 REST account API at humanbrowser.cloud/openapi.json; and an OpenAI plugin manifest plus llms.txt. Virix Labs also sells agent-run marketing and web-operations services at virixlabs.com.

Virix Labs publishes 4 API contracts indexed on the APIs.io network, including Account API, Session API, and 2 more. Tagged areas include Browser Automation, Cloud Browser, AI Agents, A2A, and MCP.

The Virix Labs catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Virix Labs’ developer surface includes documentation, API reference, getting-started guide, pricing, engineering blog, support, signup flow, and 34 more developer resources.

🌐 Visit website 📡 Source on GitHub

65.7/100 strong ▬ flat Agent 54/100 agent ready Front door AI 6/6 dominant Full breakdown ↓
scored 2026-10-09 · rubric v0.23.0

2 published contracts 1 MCP Servers

Browser Automation Cloud Browser AI Agents A2A MCP Web Scraping Residential Proxies CAPTCHA Solving Human-in-the-Loop Computer Use Agent-Native United Kingdom

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Subscription Billing & Revenue Management

BC-4250

Account

POST /api/topup GET /api/plans GET /api/usage

Kin Score

Kin Score How this is scored →
scored 2026-10-09 · rubric v0.23.0

Composite quality — 65.7/100 · strong

Contract Quality 10.7 / 19

Developer Ergonomics 11.4 / 15

Access Clarity 11.4 / 15

Operational Transparency 4.9 / 10

Contract Governance 1.6 / 9

Discoverability 5.6 / 8

Regulatory Posture 7.8 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 54/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 8 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% 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/humanbrowser-cloud: 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 4

Individual APIs this provider publishes, each with its own machine-readable definition.

Human Browser MCP Server

Model Context Protocol access to the same browser runtime, shipped two ways: a hosted Streamable HTTP endpoint at https://agent.humanbrowser.cloud/mcp that requires the hb_live_...

Human Browser A2A Agent

Agent2Agent protocol surface: an agent card (protocolVersion 0.3.0, JSONRPC, version 5.1.0) served byte-identically from https://agent.humanbrowser.cloud/.well-known/agent-card....

Virix Labs Account API

Token, balance and top-ups

Virix Labs Session API

Run a browser session against a goal

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Virix Labs MCP Server

Human Browser ships the same MCP server two ways: a hosted Streamable HTTP endpoint at https://agent.humanbrowser.cloud/mcp (the host that also serves the A2A endpoint, the agen...

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Humanbrowser Cloud Plans Pricing

7 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Humanbrowser Cloud Rate Limits

4 limits

RATE LIMITS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Humanbrowser Cloud Webhooks

ASYNCAPI

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Humanbrowser Cloud Openapi Overlay

9 actions · update · humanbrowser-cloud-openapi.json

GENERATED

Security Posture 3

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

Humanbrowser Cloud Authentication

http/apiKey/oauth2 · 4 schemes

SECURITY

Humanbrowser Cloud Domain Security

TLSv1.3 · HSTS

SECURITY

Humanbrowser Cloud Vulnerability Disclosure

disclosure policy published

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Humanbrowser Cloud Scopes

5 scopes · clientCredentials/authorizationCode

5 scopes

SCOPES

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Humanbrowser Cloud Agentic Access

6 operations · 3 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

SignUp

SignUp

Sandbox

Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 7

MCP servers, agent skills, and machine-readable catalogs

MCPServer

WellKnown

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

AgenticAccess

Scroll for all 7

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conformance

Lifecycle

Conventions

ErrorCatalog

DataModel

Webhooks

Build 4

SDKs, sample code, and the tooling you integrate with

ToolCrosswalk

Packages

SDKs

CLI

Access & Security 5

Authentication, authorization, and security posture

Authentication

Authentication

OAuthScopes

OAuthScopes

DomainSecurity

DomainSecurity

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

Operate 3

Status, limits, changes, and where to get help

Support

Support

RateLimits

RateLimits

IncidentNotification

IncidentNotification

Commercial 4

Pricing, plans, and the legal terms of use

Pricing

TermsOfService

PrivacyPolicy

Plans

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 5

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Overlay

Overlay

AgentCard

AgentCard

DataSubjectRequest

DataSubjectRequest

Subprocessors

Subprocessors

Source (apis.yml)

aid: humanbrowser-cloud
name: Virix Labs
description: 'Virix Labs is the trading name of Virix Ltd, a London software company (England & Wales no. 16325097, incorporated
  March 2025) that builds and operates Human Browser at humanbrowser.cloud: a hosted "cloud Chromium for AI agents" that runs
  a natural-language browser goal on a residential IP behind a live viewer a person can watch and take over, with CAPTCHA
  handling, persistent per-token cookie profiles and metered prepaid pricing ($0.10 per browser-minute, $4/GB bandwidth, $0.005
  per solved CAPTCHA). The same runtime is exposed four ways: an A2A 0.3.0 agent card at /.well-known/agent-card.json with
  nine skills and a JSON-RPC endpoint at agent.humanbrowser.cloud/a2a; a Model Context Protocol server both hosted (agent.humanbrowser.cloud/mcp,
  with RFC 9728 protected-resource and RFC 8414 authorization-server metadata) and shipped as a stdio server in the npm package
  @virixlabs/humanbrowser; a six-operation OpenAPI 3.1.0 REST account API at humanbrowser.cloud/openapi.json; and an OpenAI
  plugin manifest plus llms.txt. Virix Labs also sells agent-run marketing and web-operations services at virixlabs.com.'
url: https://raw.githubusercontent.com/api-evangelist/humanbrowser-cloud/refs/heads/main/apis.yml
image: https://humanbrowser.cloud/logo-512.png
x-type: company
x-source: harvest:a2a-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-09-19 (local-v3; was a2a-registry harvest stub)
specificationVersion: '0.20'
created: '2026-09-19'
modified: '2026-09-19'
tags:
- Browser Automation
- Cloud Browser
- AI Agents
- A2A
- MCP
- Web Scraping
- Residential Proxies
- CAPTCHA Solving
- Human-in-the-Loop
- Computer Use
- Agent-Native
- United Kingdom
tags_raw:
- Browser automation
- Cloud browser
- AI agents
- A2A
- MCP
- Web scraping
- Residential proxies
- CAPTCHA solving
- Human-in-the-loop
- Computer use
- Agent-native
- United Kingdom
- agent-native
apis:
- aid: humanbrowser-cloud:humanbrowser-mcp-server
  name: Human Browser MCP Server
  description: 'Model Context Protocol access to the same browser runtime, shipped two ways: a hosted Streamable HTTP endpoint
    at https://agent.humanbrowser.cloud/mcp that requires the hb_live_ bearer token (anonymous initialize and tools/list answer
    401 with WWW-Authenticate: Bearer realm="humanbrowser-mcp"; 60 requests per 60 s per token) and a stdio server inside
    the npm package (`npx -y @virixlabs/humanbrowser mcp`, HB_TOKEN env). The package source exposes three tools — humanbrowser_run,
    humanbrowser_stream, humanbrowser_viewer_url — with JSON-Schema inputSchemas; the provider''s MCP docs page describes
    a different six-tool surface that could not be verified. RFC 9728 protected-resource metadata names this endpoint as an
    OAuth resource (scopes mcp:run, mcp:read) with an authorization server on the same host.'
  humanURL: https://humanbrowser.cloud/docs/mcp
  baseURL: https://agent.humanbrowser.cloud/mcp
  tags:
  - MCP
  - Agent-Native
  - Browser Automation
  tags_raw:
  - MCP
  - agent-native
  - Browser Automation
  properties:
  - type: MCPServer
    url: mcp/humanbrowser-cloud-mcp.yml
  - type: MCPServer
    name: Human Browser MCP endpoint (Streamable HTTP)
    url: https://agent.humanbrowser.cloud/mcp
  - type: ToolCrosswalk
    url: mcp/humanbrowser-cloud-tool-crosswalk.yml
  - type: Documentation
    url: https://humanbrowser.cloud/docs/mcp
- aid: humanbrowser-cloud:humanbrowser-a2a-agent
  name: Human Browser A2A Agent
  description: 'Agent2Agent protocol surface: an agent card (protocolVersion 0.3.0, JSONRPC, version 5.1.0) served byte-identically
    from https://agent.humanbrowser.cloud/.well-known/agent-card.json and the website apex, advertising nine skills — browser_task,
    login_and_scrape, meta_business_workflow, fill_form, scrape_url, relay_reverse_api, hostile_site_solver, email_verified_signup,
    network_discovery — reached through message/send or message/stream (SSE) at POST https://agent.humanbrowser.cloud/a2a
    with tasks/get and tasks/cancel, plus twelve provider "actions/*" JSON-RPC methods. Streaming, push notifications (callback_url)
    and an input-required human-in-the-loop pause with a documented resume contract; every call needs the hb_live_ bearer
    token (anonymous calls return HTTP 401 / JSON-RPC -32001). Graded conformant against A2A 1.0.0 hard checks.'
  humanURL: https://humanbrowser.cloud/a2a
  baseURL: https://agent.humanbrowser.cloud/a2a
  tags:
  - A2A
  - Agent-Native
  - Browser Automation
  - Human-in-the-Loop
  tags_raw:
  - A2A
  - agent-native
  - Browser Automation
  - Human-in-the-Loop
  properties:
  - type: AgentCard
    url: a2a/humanbrowser-cloud-a2a.yml
  - type: AgentCard
    name: A2A Agent Card (provider-hosted)
    url: https://agent.humanbrowser.cloud/.well-known/agent-card.json
  - type: Documentation
    url: https://humanbrowser.cloud/a2a
  - type: Webhooks
    url: asyncapi/humanbrowser-cloud-webhooks.yml
- aid: humanbrowser-cloud:humanbrowser-cloud-account-api
  name: Virix Labs Account API
  description: Token, balance and top-ups
  humanURL: https://humanbrowser.cloud/docs
  baseURL: https://agent.humanbrowser.cloud
  tags:
  - Account
  tags_raw:
  - account
  properties:
  - type: OpenAPI
    url: openapi/humanbrowser-cloud-account-api-openapi.yml
  - type: Documentation
    url: https://humanbrowser.cloud/docs
  - type: APIReference
    url: https://humanbrowser.cloud/llms-full.txt
  - type: ErrorCatalog
    url: errors/humanbrowser-cloud-problem-types.yml
  - type: DataModel
    url: data-model/humanbrowser-cloud-data-model.yml
- aid: humanbrowser-cloud:humanbrowser-cloud-session-api
  name: Virix Labs Session API
  description: Run a browser session against a goal
  humanURL: https://humanbrowser.cloud/docs
  baseURL: https://agent.humanbrowser.cloud
  tags:
  - Sessions
  tags_raw:
  - session
  properties:
  - type: OpenAPI
    url: openapi/humanbrowser-cloud-session-api-openapi.yml
  - type: Documentation
    url: https://humanbrowser.cloud/docs
  - type: APIReference
    url: https://humanbrowser.cloud/llms-full.txt
  - type: ErrorCatalog
    url: errors/humanbrowser-cloud-problem-types.yml
  - type: DataModel
    url: data-model/humanbrowser-cloud-data-model.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: CapabilityMap
  url: capabilities/humanbrowser-cloud-capability-edges.yml
  name: Virix Labs Business Capability Map
- type: Overlay
  url: overlays/humanbrowser-cloud-openapi-overlay.yaml
- type: Website
  url: https://humanbrowser.cloud/
- type: Documentation
  url: https://humanbrowser.cloud/docs
- type: APIReference
  url: https://humanbrowser.cloud/openapi.json
- type: GettingStarted
  url: https://humanbrowser.cloud/install
- type: Pricing
  url: https://humanbrowser.cloud/install
- type: Blog
  url: https://humanbrowser.cloud/blog
- type: Support
  url: https://humanbrowser.cloud/contact
- type: SignUp
  url: https://humanbrowser.cloud/account
- type: TermsOfService
  url: https://humanbrowser.cloud/terms
- type: PrivacyPolicy
  url: https://humanbrowser.cloud/privacy
- type: AgentCard
  url: a2a/humanbrowser-cloud-a2a.yml
- type: MCPServer
  url: mcp/humanbrowser-cloud-mcp.yml
- type: ToolCrosswalk
  url: mcp/humanbrowser-cloud-tool-crosswalk.yml
- type: WellKnown
  url: well-known/humanbrowser-cloud-well-known.yml
- type: LLMsTxt
  url: llms/humanbrowser-cloud-llms.txt
- type: LLMsTxt
  name: llms.txt (provider-hosted)
  url: https://humanbrowser.cloud/llms.txt
- type: Packages
  url: packages/humanbrowser-cloud-packages.yml
- type: SDKs
  url: packages/humanbrowser-cloud-packages.yml
- type: CLI
  url: cli/humanbrowser-cloud-cli.yml
- type: Plans
  url: plans/humanbrowser-cloud-plans-pricing.yml
- type: RateLimits
  url: rate-limits/humanbrowser-cloud-rate-limits.yml
- type: Conformance
  url: conformance/humanbrowser-cloud-conformance.yml
- type: Lifecycle
  url: lifecycle/humanbrowser-cloud-lifecycle.yml
- type: Conventions
  url: conventions/humanbrowser-cloud-conventions.yml
- type: ErrorCatalog
  url: errors/humanbrowser-cloud-problem-types.yml
- type: DataModel
  url: data-model/humanbrowser-cloud-data-model.yml
- type: Sandbox
  url: sandbox/humanbrowser-cloud-sandbox.yml
- type: Webhooks
  url: asyncapi/humanbrowser-cloud-webhooks.yml
- type: AgentSkill
  url: skills/_index.yml
- type: AgentSkill
  name: human-browser (provider-published SKILL.md)
  url: skills/humanbrowser-cloud-human-browser.md
- type: Authentication
  url: authentication/humanbrowser-cloud-authentication.yml
- type: OAuthScopes
  url: scopes/humanbrowser-cloud-scopes.yml
- type: DomainSecurity
  url: security/humanbrowser-cloud-domain-security.yml
- type: VulnerabilityDisclosure
  url: security/humanbrowser-cloud-vulnerability-disclosure.yml
- type: Security
  url: security/humanbrowser-cloud-vulnerability-disclosure.yml
- type: AgenticAccess
  url: agentic-access/humanbrowser-cloud-agentic-access.yml
- type: DataSubjectRequest
  url: regulatory/humanbrowser-cloud-regulatory-posture.yml
- type: Subprocessors
  url: regulatory/humanbrowser-cloud-regulatory-posture.yml
- type: IncidentNotification
  url: regulatory/humanbrowser-cloud-regulatory-posture.yml
x-enrichment:
  date: '2026-09-19'
  status: enriched
  artifacts_added: 32
  pass: local-v3
x-a2a:
  verified: true
  probed: '2026-09-26'
  url: https://agent.humanbrowser.cloud/.well-known/agent-card.json
  grade: conformant
  protocol_version: 1.0.0
  control: 404

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