# Friendly Captcha

**Canonical:** https://apis.io/providers/friendly-captcha/  
**Website:** https://friendlycaptcha.com/  
**APIs profiled:** 5

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.

## Kin Score — 37.5 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 37.5).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 54.5 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 23.7 |
| Developer Ergonomics | 23.8 |
| Commercial Clarity | 39.5 |
| Access Clarity | 39.5 |

## Agent readiness — 29.1 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Free · Self-serve signup — onboarding: self-serve, pricing: free, trial: no (confidence: high).

## APIs (5)

- **Friendly Captcha Siteverify API** — 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 succe...
- **Friendly Captcha Widget** — 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 ...
- **Friendly Captcha Framework SDKs** — 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, an...
- **Friendly Captcha CMS Plugins** — 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 ...
- **Friendly Captcha Siteverify API** — The Siteverify API from Friendly Captcha — 1 operation(s) for siteverify.

## Agentic access (1)

- **Friendly Captcha Agentic Access** — 1 operation · 1 acting

## Security (2)

- **Friendly Captcha Authentication** — apiKey · 1 scheme
- **Friendly Captcha Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Plans (1)

- **Friendly Captcha Plans Pricing**

## Tags

CAPTCHA, Bot Defense, Privacy, Proof of Work, GDPR, European Hosting, Accessibility

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/friendly-captcha/). Scores are computed from the provider's own public artifacts under a published rubric.