Friendly Captcha

aid: friendly-captcha
name: Friendly Captcha
description: 'Friendly Captcha is a privacy-first, GDPR-compliant bot protection

  service from Germany that uses proof-of-work cryptographic puzzles

  instead of image-labeling challenges. The widget solves a puzzle in

  the background while a user fills out a form, then submits a token

  the server validates against the Friendly Captcha siteverify endpoint.

  The result includes a risk verdict and additional signal intelligence

  (IP, bot detection, browser identification, anonymization detection).

  Friendly Captcha publishes open-source widgets and framework

  integrations for React, Vue, and Angular, plus pre-built plugins for

  WordPress, Magento, and other CMS platforms.

  '
type: Index
deliveryModel:
  model: open-core
  license: MIT
  open_source: true
  commercial: true
  callable_host: true
  label: Open core · an OSS project plus a commercial hosted product
  confidence: high
  source:
  - license
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: free
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Free · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
position: Producing
access: Public
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/friendly-captcha.png
tags:
- CAPTCHA
- Bot Defense
- Privacy
- Proof of Work
- GDPR
- European Hosting
- Accessibility
url: https://raw.githubusercontent.com/api-evangelist/friendly-captcha/refs/heads/main/apis.yml
created: '2026-05-23'
modified: '2026-05-23'
specificationVersion: '0.23'
apis:
- aid: friendly-captcha:siteverify
  name: Friendly Captcha Siteverify API
  description: 'The siteverify endpoint validates a Friendly Captcha solution

    token. The server POSTs the token and API key (with optional

    sitekey) and receives a JSON response indicating success, risk

    score, IP intelligence, bot detection signals, and any error

    codes. This is the canonical server-side check for protected

    form submissions and API calls.

    '
  humanURL: https://developer.friendlycaptcha.com/docs/v2/getting-started/verify
  baseURL: https://global.frcapi.com/api/v2/captcha/siteverify
  tags:
  - Siteverify
  - Token Verification
  - Risk Signals
  properties:
  - type: Documentation
    url: https://developer.friendlycaptcha.com/docs/v2/getting-started/verify
  - type: APIReference
    url: https://developer.friendlycaptcha.com/docs/v2/api-reference
  - type: EndpointURL
    url: https://global.frcapi.com/api/v2/captcha/siteverify
- aid: friendly-captcha:widget
  name: Friendly Captcha Widget
  description: 'The Friendly Captcha widget is the JavaScript component that runs

    the proof-of-work puzzle in the browser and produces a solution

    token. It is configured via a script tag and a div with the

    sitekey and API endpoint, and can run automatically or on demand.

    '
  humanURL: https://developer.friendlycaptcha.com/docs/v2/getting-started/widget
  baseURL: https://developer.friendlycaptcha.com/docs/v2/getting-started/widget
  tags:
  - JavaScript
  - Widgets
  - Proof of Work
  - Frontend
  tags_raw:
  - JavaScript
  - Widget
  - Proof of Work
  - Frontend
  properties:
  - type: Documentation
    url: https://developer.friendlycaptcha.com/docs/v2/getting-started/widget
  - type: Repository
    url: https://github.com/FriendlyCaptcha/friendly-challenge
  - type: Package
    url: https://www.npmjs.com/package/friendly-challenge
- aid: friendly-captcha:framework-sdks
  name: Friendly Captcha Framework SDKs
  description: 'Friendly Captcha publishes open-source wrappers for React, Vue,

    and Angular that expose the widget as an idiomatic component in

    each framework, handling lifecycle, callbacks, and token flow.

    '
  humanURL: https://developer.friendlycaptcha.com/docs/v2/integrations
  baseURL: https://developer.friendlycaptcha.com/docs/v2/integrations
  tags:
  - React
  - Vue
  - Angular
  - SDK
  properties:
  - type: Documentation
    url: https://developer.friendlycaptcha.com/docs/v2/integrations
  - type: SDKReact
    url: https://github.com/FriendlyCaptcha/friendly-captcha-react
  - type: SDKVue
    url: https://github.com/FriendlyCaptcha/friendly-captcha-vue
  - type: SDKAngular
    url: https://github.com/FriendlyCaptcha/friendly-captcha-angular
  - type: GitHubOrganization
    url: https://github.com/FriendlyCaptcha
- aid: friendly-captcha:plugins
  name: Friendly Captcha CMS Plugins
  description: 'Pre-built plugins integrate Friendly Captcha into WordPress,

    Magento, and other CMS platforms, letting non-developers add

    privacy-preserving bot defense to common forms without writing

    code.

    '
  humanURL: https://friendlycaptcha.com/integrations/
  tags:
  - WordPress
  - Magento
  - CMS Plugin
  properties:
  - type: IntegrationsPage
    url: https://friendlycaptcha.com/integrations/
- aid: friendly-captcha:friendly-captcha-siteverify-api
  name: Friendly Captcha Siteverify API
  description: The Siteverify API from Friendly Captcha — 1 operation(s) for siteverify.
  humanURL: https://developer.friendlycaptcha.com/docs/v2/getting-started/verify
  baseURL: https://global.frcapi.com/api/v2/captcha/siteverify
  tags:
  - Siteverify
  properties:
  - type: OpenAPI
    url: openapi/friendly-captcha-siteverify-api-openapi.yml
features:
- name: Proof-of-Work Verification
  description: Cryptographic puzzles run silently in the background instead of asking users to label images.
- name: Privacy-First Design
  description: No tracking cookies, GDPR-compliant by default, and EU-hosted endpoints available.
- name: Open-Source Widget
  description: The friendly-challenge widget is published as open source.
- name: Framework SDKs
  description: First-party React, Vue, and Angular integrations.
- name: Accessibility
  description: Verification requires no user gesture, removing accessibility barriers from image CAPTCHAs.
- name: Risk Signal API
  description: Siteverify responses include risk scores, IP intelligence, and bot signals.
useCases:
- name: Form Protection
  description: Gate signup, contact, and login forms behind a proof-of-work challenge.
- name: API Abuse Prevention
  description: Require a Friendly Captcha token before accepting unauthenticated API requests.
- name: GDPR-Sensitive Deployments
  description: Replace third-country CAPTCHA services with an EU-hosted, privacy-first alternative.
- name: Accessibility-First Forms
  description: Protect forms without imposing image-labeling challenges that exclude some users.
- name: CMS Site Protection
  description: Add bot defense to WordPress, Magento, and other CMS sites via prebuilt plugins.
integrations:
- name: React
- name: Vue
- name: Angular
- name: WordPress
- name: Magento
- name: HubSpot
- name: Drupal
authentication:
- type: SiteKey
  description: Public sitekey embedded in the widget identifies the protected property.
- type: APIKey
  description: Server-side API key used to call the siteverify endpoint.
common:
- type: IssueTracker
  url: https://github.com/FriendlyCaptcha/friendly-challenge/issues
- type: License
  name: MIT
  url: https://github.com/FriendlyCaptcha/friendly-challenge/blob/master/LICENSE
- type: AgenticAccess
  url: agentic-access/friendly-captcha-agentic-access.yml
- type: DomainSecurity
  url: security/friendly-captcha-domain-security.yml
- type: Authentication
  url: authentication/friendly-captcha-authentication.yml
- type: Website
  url: https://friendlycaptcha.com/
- type: Documentation
  url: https://developer.friendlycaptcha.com/
- type: APIReference
  url: https://developer.friendlycaptcha.com/docs/v2/api-reference
- type: Pricing
  url: https://friendlycaptcha.com/pricing/
- type: Integrations
  url: https://friendlycaptcha.com/integrations/
- type: GitHubOrganization
  url: https://github.com/FriendlyCaptcha
- type: Blog
  url: https://friendlycaptcha.com/insights/
- type: Privacy
  url: https://friendlycaptcha.com/legal/privacy-end-users/
- type: Contact
  url: https://friendlycaptcha.com/contact/
- type: LlmsText
  url: https://developer.friendlycaptcha.com/llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com