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Testing Optimization Boundary Dates JavaScript Analysis On-Demand Data Data Simulation Error Handling Float Precision Dynamic Test Data Automated Testing Performance Evaluation Quality Assurance Fuzz Testing Named Groups Input Validation Unicode Handling Development Workflow Pattern Matching Test Data Generation Development Tools Mock Data Population

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Best performance testing APIs

Regular Expression Tester API

Natural Language Processing (NLP)

Test a regular expression against an input text and get every match with capture groups and named groups. Patterns run in an isolated worker with a hard time limit, so catastrophic patterns are stopped safely.

Free 7-Day Trial

100% uptime 187ms avg MCP ready

Capture Website Performance API

Data & Analytics

Capture essential performance data for your website to identify areas for improvement in real-time.

Free 7-Day Trial

100% uptime 173ms avg MCP ready

Edge Case Test Data Generator API

Tools & Utilities

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.

Free 7-Day Trial

100% uptime 652ms avg MCP ready

Retrieve Web Data Speed Test API

Tools & Utilities

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

Free 7-Day Trial

100% uptime 527ms avg MCP ready

Website Performance Analyzer API

Data & Analytics

Analyze any web page URL to obtain detailed performance metrics, information about JavaScript execution, data on layout stability, and caching efficiency.

Free 7-Day Trial

100% uptime 18,705ms avg MCP ready

Database Seeding MockHero API

Tools & Utilities

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

Free 7-Day Trial

100% uptime 898ms avg MCP ready

Web Speed Test API

Data & Analytics

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

Free 7-Day Trial

100% uptime 5,864ms avg MCP ready

Test Data Generator MockHero API

Tools & Utilities

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

Free 7-Day Trial

100% uptime 1,451ms avg MCP ready

Dynamic Test Data MockHero API

Tools & Utilities

Effortlessly generate dynamic test data on demand using MockHero's Dynamic Test Data API, optimizing your testing process.

Free 7-Day Trial

100% uptime 1,531ms avg MCP ready

Web Performance Data Capture API

Data & Analytics

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

Free 7-Day Trial

100% uptime 1,151ms avg MCP ready

QA Test Fixtures CI Seed Data Generator API

Tools & Utilities

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.

Free 7-Day Trial

100% uptime MCP ready

Injection Test String Generator API

Security & Cybersecurity

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

Free 7-Day Trial

100% uptime MCP ready

Integer Floating Point Precision Testing Generator API

Tools & Utilities

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.

Free 7-Day Trial

100% uptime MCP ready

Fuzz Testing Input Validation Test Data Generator API

Tools & Utilities

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

Free 7-Day Trial

100% uptime MCP ready

Boundary Value Off-By-One Test Data Generator API

Tools & Utilities

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.

Free 7-Day Trial

100% uptime MCP ready

Unicode Internationalization Test Data Generator API

Tools & Utilities

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

Free 7-Day Trial

100% uptime MCP ready

Malformed Hostile String Testing Data Generator API

Tools & Utilities

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.

Free 7-Day Trial

100% uptime MCP ready

Date Time Leap Year DST Edge Case Generator API

Tools & Utilities

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.

Free 7-Day Trial