The WhatsApp OTP API enables seamless user authentication and transaction verification by sending OTPs directly to phone numbers.

License verification API for validating license keys, enforcing activation limits, and preventing key sharing for software, SaaS, plugins, and desktop apps.

Empower your communication with the Poland SMS Sender API. Seamlessly integrate SMS functionality into your applications, enabling instant and reliable messaging to Polish contacts. Unlock the potential to engage, inform, and connect with your audience effortlessly, ensuring your messages reach their destination with speed and precision.

Generate cryptographic hashes and checksums of any text, sign payloads with a secret key, encode and decode data, and create random unique identifiers in one call. Nothing is stored.

Decode any signed web token into its header, payload and claim checks, and verify the signature with a shared secret or a public key. Nine algorithms supported. Nothing is stored.

Send OTP and notifications to your users by email. Forget about configurations and records with this API.

The Hashing API ensures string security effortlessly, offering top-notch methods such as SHA and MD5. Safeguard sensitive data with robust hashing techniques, providing a reliable layer of protection for your information.

Unlock the power of secure data management with our Hashing Encryption and Decryption API. Safeguard your strings effortlessly by choosing from top-notch methods like SHA and MD5. Whether encrypting for confidentiality or decrypting for insight, our API ensures your data remains in your control, fortified with cutting-edge cryptographic techniques.

Elevate your correspondence with the HTML Business Signature Generator API. Craft exquisite email signatures that mirror your brand's essence dynamically. Seamlessly integrate personalized signatures into your communication flow, leaving an indelible mark of professionalism and creativity.

Optimize software ownership with our Software Licensing Solutions API for reliable license verification and activation.

License validation backend for Gumroad and direct software sellers. Verify keys, enforce activation limits, and prevent key sharing without building custom infrastructure.

Safeguard digital products with our Digital Product Security API for robust license verification and activation.

Protect your revenue with our Key Sharing Prevention API, ensuring secure license verification and activation processes.

Easily Encrypt/Decrypt MD5, SHA1, SHA256, SHA384, SHA512 and more...

PresentID Document scanner API localizes document images with various distortion types from a single input image.

EU-Compliance: Digital Product Passport (DPP) Immutable QR Engine. Guaranteed 10-year URL persistence for Textile and Battery ESPR mandates (March 2026). High-error-correction QR generation optimized for industrial label printing. Frankfurt (EU-Central) data residency.

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

Ensure email deliverability with our Authentic Email Verification API, boosting your communication success.

Boost your outreach success with the Marketing Outreach Email Authenticity API, ensuring genuine engagement.

Introducing HTML Business Email Footer API, a powerful tool that streamlines the process of creating professional, eye-catching signatures for users of all sizes.

Experience robust security with our SHA256 Encrypt API. Safeguard sensitive information by transforming plain text into SHA256 hashes effortlessly. Ideal for protecting passwords and confidential data, ensuring privacy and security. Streamline encryption processes with this powerful tool, offering reliable data protection for a wide range of applications.

Ensure secure email communication with Arctic Mail Integrity Assurance for trustworthy interactions.

Identifies and filters disposable and public emails, enhancing data quality and user security across registration and marketing platforms.

Safeguard your email campaigns with our Secure Email Validation and Verification API, enhancing trust and performance.

The Passkey Generation API creates strong passwords with custom special characters and lengths (8, 16, or 32 characters), enhancing online security.