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Phone Number Validation Electronic Signature Validation Localization Quality Check Risk Assessment Spelling Correction Certificate Placeholder Verification Location Detection Message Visibility Card Gravatar Lookup DMARC Check Email Security Compliance Email Engagement Domain Verification Email Performance Missing Keys Detection Role-Based Email Detection DNS Validation

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Best checks APIs

Card Checker API

Finance & Payments

The Card Checker API is a powerful tool for businesses to validate bank card authenticity, prevent fraud, and ensure smooth transactions.

Free 7-Day Trial

100% uptime 85ms avg MCP ready

EmailLabs Verification API

Communication & Messaging

Validate and score email addresses in real time — syntax, domain/MX, disposable, role-based and typo detection. Every check except SMTP, in a single fast call.

Free 7-Day Trial

100% uptime 307ms avg MCP ready

Phone Validator API

Communication & Messaging

Validate and format phone numbers globally, detect disposable numbers, providers, locations, time zones, and country details for accurate communication workflows.

Free 7-Day Trial

100% uptime 641ms avg MCP ready

EmailLabs Email Verification API

Communication & Messaging

Validate and score email addresses in real time — syntax, domain/MX, disposable, role-based and typo detection. Every check except SMTP, in a single fast call.

Free 7-Day Trial

100% uptime 294ms avg MCP ready

Real Time Email Checker API

Communication & Messaging

Verify emails in real time, detect valid domains, correct formatting, MX records, gravatars, and blacklists to ensure reliable deliverability.

Free 7-Day Trial

100% uptime 236ms avg MCP ready

Spell and Grammar Checker API

Natural Language Processing (NLP)

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.

Free 7-Day Trial

100% uptime 174ms avg MCP ready

Mail Check API

Communication & Messaging

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

100% uptime 336ms avg MCP ready

Email Secure Check API

Communication & Messaging

This API validates email addresses, detecting disposable or forwarding domains, analyzing MX records, and providing detailed heuristic insights and risk assessment.

Free 7-Day Trial

100% uptime 374ms avg MCP ready

Email Check Secure API

Communication & Messaging

Accurately verify emails by evaluating format, domain, MX, SPF, DMARC, blacklists, reliability, and detecting disposable, suspicious, or role-based emails.

Free 7-Day Trial

100% uptime 297ms avg MCP ready

Fast Email Validation API

Communication & Messaging

Validates email addresses by checking format, domain, and MX records, providing structured results and metadata for automatic integrations.

Free 7-Day Trial

100% uptime 571ms avg MCP ready

Disposable Email Check API

Finance & Payments

Validates whether an email address is temporary or disposable, returning true or false to facilitate automated filtering.

Free 7-Day Trial

100% uptime 559ms avg MCP ready

Secure Card Check API

Finance & Payments

The Secure Card Check API validates card BINs and returns issuer details, card type, brand, country, and bank contact information instantly.

Free 7-Day Trial

100% uptime 152ms avg MCP ready

Quick Email Verification API

Communication & Messaging

Ensure high-quality leads with the Quick Email Verification API, your fast, reliable solution.

Free 7-Day Trial

100% uptime 84ms avg MCP ready

Checkmail API

Communication & Messaging

Email verification API with real SMTP RCTP TO check, DNS, disposable, catch-all, and role-based detection in a single request.

Free 7-Day Trial

100% uptime 482ms avg MCP ready

Trusted Email Checker API

Security & Cybersecurity

Validate and verify email addresses securely to enhance user trust and reduce fraud with our Trusted Email Checker API.

Free 7-Day Trial

100% uptime 63ms avg MCP ready

Card Secure Checkup API

Finance & Payments

Validates BIN numbers instantly and provides card brand, type, level, issuing bank, country details, and official bank contact information.

Free 7-Day Trial

100% uptime 266ms avg MCP ready

Card Secure Check API

Finance & Payments

Instantly checks BIN numbers to provide detailed insights like card classification, issuing bank, region, brand, and essential contact information for verification.

Free 7-Day Trial

100% uptime 191ms avg MCP ready

Bank Card Checker API

Finance & Payments

Improve fraud detection with the Bank Bank Card Checker API, which effectively protects all cross-border transactions.

Free 7-Day Trial

100% uptime 129ms avg MCP ready

Instant Email Validator API

Communication & Messaging

Get real-time results with our Instant Email Validator API, ensuring reliable communication every time.

Free 7-Day Trial

100% uptime 841ms avg MCP ready

Digital Signature Verification API

Legal & Compliance

Digital Signature Verification API ensures compliance by validating electronic signatures, including QES and AdES.

Free 7-Day Trial

100% uptime 383ms avg MCP ready

Localization QA API

Natural Language Processing (NLP)

Checks translated JSON, localization strings, placeholders, ICU messages, missing keys, extra keys, empty values, untranslated values, and multi-locale consistency.

Free 7-Day Trial