The User Agents API is a comprehensive solution for generating realistic and diverse user agents for your website or application. With advanced algorithms, it creates user agents that mimic real browsers and devices, ensuring that your requests are not detected as suspicious or blocked.

Fast & reliable online code compilation and execution of APIs for 50+ languages & databases

The User Agent Builder API allows developers to create and customize user agent strings for web scraping, testing, and automation. Generate realistic and varied user agent strings to mimic different browsers and devices, ensuring better performance and evasion of anti-bot measures.

The Custom User Agent API allows developers to create tailored user agent strings for web scraping, testing, and automation. Generate specific user agents to simulate various browsers and devices, enhancing compatibility testing, performance analysis, and evasion of anti-bot systems for more effective and reliable application behavior.

The User Agent Analyzer API parses user agent strings to accurately identify details about the device, browser, and operating system.

"Elevate applications and simulations with a versatile, randomized user profile generator for authentic testing and development."

MockHero’s Mock Data API simplifies creating placeholder data, perfect for testing and development needs.

Quickly assess the efficiency of your site using the Retrieve Web Data Speed Test API for optimal performance insights.

Edge case test data for QA and fuzz testing: Unicode, injection probes, boundary dates, float precision. 16 types, reproducible seeds, and every value explains what it breaks.

Use the Database Seeding Database Seeding MockHero API to populate your databases with quality test data, streamlining your development workflow.

Evaluate web performance by measuring server-client metrics, detect common issues, and generate detailed automatic optimization suggestions.

Generate realistic test data effortlessly with MockHero's Test Data Generator API, enhancing your development process.

Capture crucial web performance data with our API, enabling deep analysis for your website’s speed and efficiency.

Audit web pages or whole websites for WCAG 2.2, EN 301 549 (European Accessibility Act) and Section 508 in a real browser. JSON, CSV or HTML report.

Instantly validate how any URL will appear when shared on Facebook, LinkedIn, Twitter, and WhatsApp. Returns a full JSON report with platform-specific scores, broken tag detection, image dimension checks, and plain-English fix instructions — all in a single API call.

Monitor internet speeds effortlessly with the Speed Test Data Retrieval API, ensuring optimal performance for users.

Enhance website performance with the Web Content Speed Fetch API, ensuring fast load times for users.

Canonical injection test strings for checking your own escaping: SQL tautology, XSS, path traversal, template injection. Harmless probes, not working exploits. Reproducible seeds.

Fuzz testing input data for validation layers: malformed strings, boundary values, control characters. 16 field types, reproducible seeds; each value explains what it breaks.

Malformed and hostile string test data for input handling: control characters, null bytes, encoding edge cases. Reproducible seeds, and every value explains what it breaks.

Unicode test data for internationalization testing: combining marks, bidi overrides, ZWJ emoji, homoglyphs. Deterministic seeds, and every value explains what it breaks.

Integer and floating-point edge cases: int32/int64 limits, NaN, infinity, denormals, and IEEE 754 rounding. Deterministic seeds, and every value explains what it breaks.

QA test fixtures and CI seed data with reproducible seeds, so pinned test runs return identical rows every time. 16 field types, each value explaining what it breaks.

Boundary value test data for off-by-one bugs: int32 and int64 limits, max-length strings, empty values. Deterministic seeds, and every value explains what it breaks.

Date and time edge cases: Feb 29, DST gaps, year 2038, leap seconds, and quarter-hour UTC offsets. Reproducible seeds, and every value explains what it breaks.