# Turnstile Siteverify API

**Canonical:** https://apis.io/apis/cloudflare-turnstile/siteverify/  
**Provider:** Cloudflare Turnstile — https://apis.io/providers/cloudflare-turnstile/  
**Base URL:** https://challenges.cloudflare.com/turnstile/v0/siteverify  
**Documentation:** https://developers.cloudflare.com/turnstile/get-started/server-side-validation/

Turnstile Siteverify API is one of 5 APIs that [Cloudflare Turnstile](https://apis.io/providers/cloudflare-turnstile/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Siteverify, Server-Side, and Token Verification. The published artifact set on APIs.io includes API documentation and an API reference.

The Turnstile siteverify endpoint accepts a token produced by the browser widget along with the site's secret key and an optional remote IP and idempotency key, and returns a JSON verdict with success, hostname, action, cdata, and any error codes. This is the canonical server-side check that authorizes a form submission or API call protected by Turnstile.

## Machine-readable artifacts (4)

- **Documentation** — https://developers.cloudflare.com/turnstile/get-started/server-side-validation/
- **APIReference** — https://developers.cloudflare.com/turnstile/get-started/server-side-validation/
- **EndpointURL** — https://challenges.cloudflare.com/turnstile/v0/siteverify
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/cloudflare-turnstile/refs/heads/main/apis.yml

## Other Cloudflare Turnstile APIs (4)

- [Turnstile Client Widget](https://apis.io/apis/cloudflare-turnstile/client-widget/)
- [Turnstile Pre-Clearance](https://apis.io/apis/cloudflare-turnstile/pre-clearance/)
- [Cloudflare Turnstile Management API](https://apis.io/apis/cloudflare-turnstile/management-api/)
- [Cloudflare Turnstile Verification API](https://apis.io/apis/cloudflare-turnstile/cloudflare-turnstile-verification-api/)

## Tags

Siteverify, Server-Side, Token Verification

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/cloudflare-turnstile/siteverify/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/cloudflare-turnstile/.