This API is able to detect any spelling or grammar errors in your application. Submit text and receive a JSON response with potential errors and suggested corrections.

Text Case Converter API is a tool that developers can use to convert text to uppercase and lowercase automatically.

It is a powerful tool for correcting the capitalization that text should have quickly and easily. With this API, you can easily format text to meet various style guidelines,

Validate email addresses in real time with syntax checks, domain verification, MX records, disposable email detection, role-based email detection, and deliverability scoring.

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.

Privacy-first syntax, DNS/MX, disposable-domain, role-account, typo, free-provider, and duplicate screening without SMTP mailbox probing.

EPC label, EPBD MEPS compliance, and stranding-risk screening across 8 EU markets — primary energy, solar obligation, renovation cost, and cap-rate discount modelling for lenders and asset managers.

Submit a URL and instantly learn if it’s indexable by Google, with detailed diagnostics for robots rules, meta tags, redirects, soft-404s, and more.

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.

Ensure email integrity with Email Sanity Checker API, detecting spoofing and phishing threats seamlessly.

Checks eSIM compatibility and returns SIM card information from a submitted IMEI number.

Boost your email campaigns' effectiveness using our Email Address Accuracy Checker API for precise validation.

Facilitate seamless compliance checks with our EU Building Energy Compliance API for Fund Compliance Teams designed specifically for Fund Compliance Teams.

Assess risk effectively using our EU Building Energy Compliance Risk Assessment API, safeguarding your investments against non-compliance.

Optimize your acquisition strategies with our Acquisitions Focused Acquisitions Focused EU Building Energy Compliance API, ensuring energy-efficient properties.

Protect your financial exposure with our Comprehensive Comprehensive EU Building Energy Compliance API for Financial Exposure ensuring robust compliance across all standards.

Score IR35 and off-payroll working risk for UK engagements, alongside 19 other jurisdictions' classification tests, with factor-by-factor reasoning.

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.

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.

Unicode test data for internationalization testing: combining marks, bidi overrides, ZWJ emoji, homoglyphs. 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.