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Api

Cloudflare

Security
Needs review
v18075576
A client-side JavaScript library for Cloudflare Turnstile, a CAPTCHA alternative to verify legitimate users without intrusive challenges.
Updated 10/27/2026
https://challenges.cloudflare.com/turnstile/v0/b/d2d3316b729e/api.js?onload=DraY9&render=explicit
Overall Score
89

Recorded Observations

137

For this resource version

File Size

84.70 KB

Download size

Load Time

26.46ms

Network latency

Execution Time

1.85ms

Runtime performance

Version Telemetry

Version Timeline

Visual representation of each version's active period

Metrics Over Time

Security score, performance score, and file size trends

0255075100v1807Normalized ScoreVersion
Security Score
Performance Score
File Size (KB)

Uptime History

Average response time over time

Version History Details

Detailed information for each version

v18075576Latest
Span: 4 days
Score: 79
Size: 84.70 KB

Exposure & Risks

Security Score

Overall Security79 / 100
Security RatingNeeds review

Risk Assessment

Critical Risks0
Total Observations1

Security Rating

Needs review
Behavioral concerns detected; review and mitigation are advised.

Behavioral Concerns

No Known Security Risks

Our telemetry scan did not detect any immediate behavioral security risks for this resource.

Security Observations

Security-related findings from analysis

No security observations recorded for this version

Privacy & Data Flow

Data Collection

Cookies and local storage used by this script

Cookies

__cf_bm30 minutes
Used by Cloudflare's Bot Management service to distinguish between human users and bots, helping to protect websites from malicious automated traffic. This cookie is considered strictly necessary for security.

Local Storage

_cf_chl_seq
Stores a sequence number for bot challenge flows, used to manage the state of a user's interaction with a Cloudflare security challenge. This key is temporary and crucial for challenge completion.

Third-party Connections

External domains this script connects to

No external connections detected

Permissions Required

Browser permissions and capabilities used

No special browser permissions required.

Privacy Observations

Privacy-related findings from analysis

No privacy observations recorded for this version

Technical & Performance Analytics

Load Performance

File Size84.70 KB
Load Time26.46ms

Runtime Performance

Execution Time1.85ms
Network Requests0

Impact Assessment

Good
Minimal performance impact on page load

Performance Observations

Performance-related findings from analysis

No performance observations recorded for this version

Global Variables

Variables added to the global scope

turnstile

Event Listeners

Events this script listens for

No event listeners detected

Browser API Access

APIs and browser features accessed by this script

No API access detected

Technical Details

Compressed
Yes
CDN Delivery
Yes
Recorded Observations
137
Is Mirror
No
Network Requests
0
Resource Hash
18075576bfb9f1a312df482b69d71e05b2a749dbb2afaed4d1ef8e0026701690

AI Insights & Alternatives

Description

A comprehensive overview of this resource

Cloudflare Turnstile is a smart CAPTCHA alternative designed to verify non-bot traffic without requiring users to solve puzzles or perform other disruptive actions. This script initializes and manages the Turnstile widget on a webpage. When loaded, it communicates with Cloudflare's servers to assess user behavior and device characteristics in the background, employing telemetry, browser heuristics, and machine learning models. Based on this analysis, it determines if the user is legitimate or potentially a bot, issuing a non-interactive challenge if needed. The script provides APIs for developers to explicitly render Turnstile widgets and receive a verification token upon successful completion. This token can then be validated on the server-side to secure forms, logins, and other critical user actions. Its primary goal is to minimize user friction while providing strong bot protection, thereby enhancing the security and user experience of websites.

Key Features

Core functionalities and capabilities of this resource

  • Bot Detection
  • CAPTCHA Alternative
  • Non-interactive Challenges
  • User Verification
  • Spam Protection
  • Frictionless User Experience
  • Telemetry Analysis

Alternatives

Similar libraries you might consider

Documentation & Resources

Official Documentation