Selenium

Selenium is the open-source browser automation project behind the W3C WebDriver and WebDriver BiDi standards. It drives real browsers through a vendor-neutral, standardised HTTP wire protocol that the browser vendors implement themselves, with official language bindings for Java, Python, C#, Ruby and JavaScript, all released in lockstep. The suite covers WebDriver (the browser-control protocol), Selenium Grid (distributed, parallel execution across machines and platforms), Selenium Manager (a Rust CLI that resolves and downloads matching browser drivers automatically) and Selenium IDE (record and playback). Selenium is self-hosted software rather than a service: there is no vendor-operated API host, no account and no pricing — the remote end runs on infrastructure the consumer owns, at a documented default of http://localhost:4444, under Apache-2.0 and the stewardship of the Software Freedom Conservancy.

Selenium publishes 6 APIs on the APIs.io network, including Cookies API, Elements API, Navigation API, and 3 more. Tagged areas include Automation, Browsers, End-to-End Testing, Quality Assurance, and Testing.

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

Selenium’s developer surface includes engineering blog, support, documentation, API reference, getting-started guide, CLI, authentication, and 29 more developer resources.

🌐 Visit website 📡 Source on GitHub

40.6/100 developing ▬ flat Agent 28/100 agent aware saas Full breakdown ↓
scored 2026-09-14 · rubric v0.22.0

AccessFreemium

1 APIs

Automation Browsers End-to-End Testing Quality Assurance Testing WebDriver

Kin Score

Kin Score How this is scored →
scored 2026-09-14 · rubric v0.22.0

Composite quality — 40.6/100 · developing

Contract Quality 10.8 / 23

Developer Ergonomics 13.2 / 18

Access Clarity 1.4 / 18

Operational Transparency 3.1 / 12

Contract Governance 2.0 / 11

Discoverability 6.7 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 28/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 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 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

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.

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/selenium: 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 8

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

Selenium WebDriver

WebDriver is a browser automation framework that accepts commands and sends them to a browser. It is implemented through a browser-specific driver that sends commands to a brows...

Selenium Grid

Selenium Grid allows you to run test cases in different machines across different platforms. It enables the execution of test scripts on remote machines by routing commands to r...

Selenium Cookies API

Cookie management

Selenium Elements API

Element discovery and interaction

Selenium Navigation API

Page navigation and metadata

Selenium Script API

Execute JavaScript in the page context

Selenium Session API

Session lifecycle

Selenium Status API

Remote end readiness

Scroll for all 8

Open Collections 8

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Selenium WebDriver (W3C Wire Protocol) Cookies API

OPEN COLLECTION

Selenium WebDriver (W3C Wire Protocol) Cookies Elements API

OPEN COLLECTION

Selenium WebDriver (W3C Wire Protocol) Cookies Navigation API

OPEN COLLECTION

Selenium WebDriver (W3C Wire Protocol) Cookies Script API

OPEN COLLECTION

Selenium WebDriver (W3C Wire Protocol) Cookies Session API

OPEN COLLECTION

Selenium WebDriver (W3C Wire Protocol) Cookies Status API

OPEN COLLECTION

Selenium WebDriver (W3C Wire Protocol)

OPEN COLLECTION

Scroll for all 8

Pricing Plans 1

Published pricing tiers and plan structures.

Selenium Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Selenium Rate Limits

0 limits

RATE LIMITS

FinOps 1

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

Selenium Finops

FINOPS

Event Specifications 1

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

Selenium Bidi Events

ASYNCAPI

Security Posture 2

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

Selenium Authentication

3 schemes

SECURITY

Selenium Domain Security

TLSv1.3

SECURITY

Agentic Access 1

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

Selenium Agentic Access

13 operations · 9 acting · 1 human-in-the-loop

13 operations · 9 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 3

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

GraphQL

GraphQL

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

LLMsTxt

AgentSkill

WellKnownProbe

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

DataModel

Conformance

Lifecycle

Build 5

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

Packages

SDKs

CLI

ToolCrosswalk

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 5

Status, limits, changes, and where to get help

Support

Deprecation

ChangeLog

RateLimits

Releases

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

License

License

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 6

Properties that don't map to a standard resource type

Downloads

Ecosystem

Sponsor

History

EventCatalog

Governance

Source (apis.yml)

name: Selenium
description: 'Selenium is the open-source browser automation project behind the W3C WebDriver and WebDriver BiDi standards.
  It drives real browsers through a vendor-neutral, standardised HTTP wire protocol that the browser vendors implement themselves,
  with official language bindings for Java, Python, C#, Ruby and JavaScript, all released in lockstep. The suite covers WebDriver
  (the browser-control protocol), Selenium Grid (distributed, parallel execution across machines and platforms), Selenium
  Manager (a Rust CLI that resolves and downloads matching browser drivers automatically) and Selenium IDE (record and playback).
  Selenium is self-hosted software rather than a service: there is no vendor-operated API host, no account and no pricing
  — the remote end runs on infrastructure the consumer owns, at a documented default of http://localhost:4444, under Apache-2.0
  and the stewardship of the Software Freedom Conservancy.'
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://www.selenium.dev/images/selenium-logo.svg
url: https://www.selenium.dev/
created: '2024-01-01'
modified: '2026-08-26'
specificationVersion: '0.23'
apis:
- name: Selenium WebDriver
  description: WebDriver is a browser automation framework that accepts commands and sends them to a browser. It is implemented
    through a browser-specific driver that sends commands to a browser and retrieves results.
  image: https://www.selenium.dev/images/selenium-logo.svg
  humanURL: https://www.selenium.dev/documentation/webdriver/
  baseURL: http://localhost:4444
  tags:
  - Automation
  - Browsers
  - Testing
  - WebDriver
  properties:
  - type: Documentation
    url: https://www.selenium.dev/documentation/webdriver/
  - type: APIReference
    url: https://www.selenium.dev/selenium/docs/api/java/
  - type: EventCatalog
    url: asyncapi/selenium-bidi-events.yml
  - type: GettingStarted
    url: https://www.selenium.dev/documentation/webdriver/getting_started/
- name: Selenium Grid
  description: Selenium Grid allows you to run test cases in different machines across different platforms. It enables the
    execution of test scripts on remote machines by routing commands to remote web browser instances.
  image: https://www.selenium.dev/images/selenium-logo.svg
  humanURL: https://www.selenium.dev/documentation/grid/
  baseURL: http://localhost:4444
  tags:
  - Distributed
  - Grid
  - Parallel Testing
  - Testing
  properties:
  - type: Documentation
    url: https://www.selenium.dev/documentation/grid/
  - type: Configuration
    url: https://www.selenium.dev/documentation/grid/configuration/
  - type: GraphQL
    url: graphql/selenium-grid.graphql
  - type: APIReference
    url: https://www.selenium.dev/documentation/grid/advanced_features/endpoints/
  - type: GettingStarted
    url: https://www.selenium.dev/documentation/grid/getting_started/
- aid: selenium:selenium-cookies-api
  name: Selenium Cookies API
  description: Cookie management
  humanURL: https://www.selenium.dev/documentation/webdriver/
  baseURL: http://localhost:4444
  tags:
  - Cookies
  properties:
  - type: OpenAPI
    url: openapi/selenium-cookies-api-openapi.yml
  - type: Overlay
    url: overlays/selenium-cookies-api-overlay.yaml
- aid: selenium:selenium-elements-api
  name: Selenium Elements API
  description: Element discovery and interaction
  humanURL: https://www.selenium.dev/documentation/webdriver/
  baseURL: http://localhost:4444
  tags:
  - Elements
  properties:
  - type: OpenAPI
    url: openapi/selenium-elements-api-openapi.yml
  - type: Overlay
    url: overlays/selenium-elements-api-overlay.yaml
- aid: selenium:selenium-navigation-api
  name: Selenium Navigation API
  description: Page navigation and metadata
  humanURL: https://www.selenium.dev/documentation/webdriver/
  baseURL: http://localhost:4444
  tags:
  - Navigation
  properties:
  - type: OpenAPI
    url: openapi/selenium-navigation-api-openapi.yml
  - type: Overlay
    url: overlays/selenium-navigation-api-overlay.yaml
- aid: selenium:selenium-script-api
  name: Selenium Script API
  description: Execute JavaScript in the page context
  humanURL: https://www.selenium.dev/documentation/webdriver/
  baseURL: http://localhost:4444
  tags:
  - Script
  properties:
  - type: OpenAPI
    url: openapi/selenium-script-api-openapi.yml
  - type: Overlay
    url: overlays/selenium-script-api-overlay.yaml
- aid: selenium:selenium-session-api
  name: Selenium Session API
  description: Session lifecycle
  humanURL: https://www.selenium.dev/documentation/webdriver/
  baseURL: http://localhost:4444
  tags:
  - Session
  properties:
  - type: OpenAPI
    url: openapi/selenium-session-api-openapi.yml
  - type: Overlay
    url: overlays/selenium-session-api-overlay.yaml
- aid: selenium:selenium-status-api
  name: Selenium Status API
  description: Remote end readiness
  humanURL: https://www.selenium.dev/documentation/webdriver/
  baseURL: http://localhost:4444
  tags:
  - Status
  properties:
  - type: OpenAPI
    url: openapi/selenium-status-api-openapi.yml
  - type: Overlay
    url: overlays/selenium-status-api-overlay.yaml
common:
- type: Website
  url: https://www.selenium.dev/
- type: AgenticAccess
  url: agentic-access/selenium-agentic-access.yml
- type: DomainSecurity
  url: security/selenium-domain-security.yml
- type: GitHubOrganization
  url: https://github.com/SeleniumHQ
- type: Blog
  url: https://www.selenium.dev/blog/
- type: Downloads
  url: https://www.selenium.dev/downloads/
- type: Support
  url: https://www.selenium.dev/support/
- type: Ecosystem
  url: https://www.selenium.dev/ecosystem/
- type: Sponsor
  url: https://www.selenium.dev/sponsors/
- type: History
  url: https://www.selenium.dev/history/
- type: Integrations
  url: https://www.selenium.dev/ecosystem/
- type: DeveloperPortal
  url: https://www.selenium.dev/documentation/
- type: Documentation
  url: https://www.selenium.dev/documentation/
- type: APIReference
  url: https://www.selenium.dev/selenium/docs/api/java/
- type: GettingStarted
  url: https://www.selenium.dev/documentation/webdriver/getting_started/
- type: LLMsTxt
  url: llms/selenium-llms.txt
- type: Packages
  url: packages/selenium-packages.yml
- type: SDKs
  url: packages/selenium-packages.yml
- type: CLI
  url: cli/selenium-cli.yml
- type: GraphQL
  url: graphql/selenium-grid.graphql
- type: Authentication
  url: authentication/selenium-authentication.yml
- type: Conventions
  url: conventions/selenium-conventions.yml
- type: ErrorCatalog
  url: errors/selenium-problem-types.yml
- type: DataModel
  url: data-model/selenium-data-model.yml
- type: Conformance
  url: conformance/selenium-conformance.yml
- type: Lifecycle
  url: lifecycle/selenium-lifecycle.yml
- type: Deprecation
  url: lifecycle/selenium-lifecycle.yml
- type: ChangeLog
  url: changelog/selenium-changelog.yml
- type: ToolCrosswalk
  url: mcp/selenium-tool-crosswalk.yml
- type: AgentSkill
  url: skills/_index.yml
- type: EventCatalog
  url: asyncapi/selenium-bidi-events.yml
- type: WellKnownProbe
  url: well-known/selenium-well-known.yml
- type: Plans
  url: plans/selenium-plans-pricing.yml
- type: RateLimits
  url: rate-limits/selenium-rate-limits.yml
- type: Releases
  url: https://github.com/SeleniumHQ/selenium/releases
- type: Governance
  url: https://www.selenium.dev/project/governance/
- type: License
  url: https://www.selenium.dev/documentation/about/copyright/
integrations:
- name: Firefox
- name: Edge
- name: Chrome
- name: Opera
- name: Safari
- name: BrowserStack
- name: Sauce Labs
- name: TestMu AI (formerly LambdaTest)
- name: Bright Data
- name: Applitools
- name: Thordata
- name: Deploys by Netlify
maintainers:
- FN: Selenium Project
  email: selenium-developers@googlegroups.com
  url: https://www.selenium.dev/project/
tags:
- Automation
- Browsers
- End-to-End Testing
- Quality Assurance
- Testing
- WebDriver
tags_raw:
- Automation
- Browsers
- End-To-End Testing
- Quality Assurance
- Testing
- WebDriver
x-base-url-note: 'apis.yml previously carried baseURL https://www.selenium.dev on every API entry. That is the documentation
  host, not an API host: https://www.selenium.dev/status and https://www.selenium.dev/graphql both returned 404 with the site''s
  Hugo 404 HTML on 2026-08-26, and repair-api-bases.py returns the verdict `no-usable-base` for this provider. Selenium is
  self-hosted software — the WebDriver remote end and Selenium Grid run on infrastructure the consumer owns — and the project
  documents the default base as http://localhost:4444 ("Default URL for all the above modes is http://localhost:4444", https://www.selenium.dev/documentation/grid/advanced_features/endpoints/).
  Every baseURL has been set to that documented default, which also matches the servers[] blocks already present in openapi/.
  A localhost base here is the correct measurement, not a placeholder.'
x-enrichment:
  date: '2026-08-26'
  status: enriched
  artifacts_added: 26
  pass: local-v1

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