Unlock the Power of 1S2U.com APIs


Dive into the world of cutting-edge communication solutions with 1S2U.com. We offer a comprehensive suite of APIs, tailored to seamlessly integrate with your systems, ensuring you get the best out of our diverse range of services. Here's a deeper look:



Harness the power of the HTTP API for robust integration into custom-built systems. A gateway to both bulk SMS messaging and the realm of becoming an established bulk SMS provider awaits. Learn more.


Embrace the industry-standard Short Message Peer-to-Peer (SMPP) protocol. Designed for flexibility, our SMPP API provides an expansive Bulk SMS Gateway. It’s also your ticket to evolve as a major Bulk SMS Provider. Discover the possibilities. Learn more.


Make use of the Simple Mail Transfer Protocol (SMTP), an email communication standard. With our SMTP API, effortlessly incorporate email capabilities into your personalized platforms. Dive deeper here.


Gain clarity and insight with our DLR API. It offers comprehensive reporting for sent message statuses, ensuring you're always in the loop about your communication campaigns. Find out more.

5. 1s2u SMS Credits API:

Manage your credits efficiently. Whether you're checking balances or facilitating credit applications for users, seamlessly integrate all monetary metrics into your platform with the SMS Credits API. Learn how.

6. Inbound API:

Open the channels for rich two-way communication. Our Inbound API integrates effortlessly, enabling dynamic SMS interactions between you and your audience directly from your platform. Engage and connect. Find more here and here.


Achieve real-time clarity on mobile operator affiliations. Our HLR API offers the capability to send global network queries, illuminating which operator a mobile number is associated with. Stay informed. Find more here and here.

8. SMS Verification API:

Elevate security and authenticity. Our Bulk Numbers API furnishes bulk mobile numbers specifically for SMS verification, all managed through our platform, smscin.com. Pay per SMS, integrate seamlessly, and ensure utmost verification. Secure your platforms. Find more here and here.


At 1S2U.com, we're not just providing APIs; we're delivering bridges to enhanced communication, ensuring you and your business are always a step ahead. Navigate our offerings and unlock a universe of potential.