PAYWITHTHEMFINANCIAL INFRASTRUCTURE
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High-Conversion UI

Unified Checkout Infrastructure

Deliver a frictionless, mobile-optimized checkout experience that adapts dynamically to every customer. Boost payment success rates with instant UPI Intent, saved tokenized cards, and zero-latency loading.

checkout.modal.sdk
CONVERSION +18%
Render Speed:< 120ms Lightweight
UPI Smart Intent:Auto-detected GPay/PhonePe
Card Vaulting:RBI Tokenized Network Vault
Session Security:Signed Order Token
Platform Capabilities

Designed specifically to minimize drop-offs during Indian checkout.

Traditional payment gateways lose customers due to confusing redirects and slow iframe render times. Our drop-in checkout is built with modern performance standards, responsive ergonomics, and instant local payment methods.

Zero-friction UPI Intent launching directly inside installed banking apps
Dynamic sorting of payment methods based on customer's historical success rates
Custom merchant branding with logo, primary theme color, and custom CSS overrides
Complete mobile responsiveness for iOS Safari and Android Chrome viewports
Automatic retry handling on transient network failures without restarting checkout
Built-in address and GSTIN capture fields for compliant commercial invoicing

Infrastructure Specifications

SDK Bundle Size< 25KB Gzipped JavaScript
Supported BrowsersChrome, Safari, Firefox, Edge, Android WebView
Integration ModesDrop-in Modal, Inline Embed & Hosted Payment Page
Webhook SignatureHMAC-SHA256 Cryptographic Verification
Security StandardPCI-DSS Level 1 & RBI Tokenization
Why Choose Us

Engineered for reliability, scale & speed.

Deliver seamless experiences to your agents, merchants, and customers.

Blazing Fast Load Time

Compact JS bundle under 25KB gzips quickly, rendering in under 120ms even on 3G cellular connections.

Native Mobile Feel

Ergonomically designed bottom-sheet layout for handheld smartphones with thumb-friendly payment buttons.

Tokenized 1-Click Cards

Returning customers can pay instantly using saved cards validated through RBI-compliant network tokens.

Bank-Grade Encryption

All payload transfers are sealed with cryptographic ephemeral keys to ensure complete payment integrity.

Multi-Language Support

Supports vernacular Indian languages including Hindi, Marathi, Tamil, and Bengali for higher pan-India conversion.

Real-time Funnel Analytics

Identify exact customer drop-off points with granular checkout step telemetry and latency monitoring.

Step-by-Step Flow

How the transaction lifecycle works.

01

Create Order via API

Your server calls the Order API with amount and order reference, receiving a signed session token.

02

Invoke Checkout SDK

Pass the session token to our frontend JavaScript SDK to open the lightweight drop-in modal.

03

Customer Authorizes

Customer selects their preferred method and completes 1-step biometric or OTP bank verification.

04

Instant Verification

Your backend receives an encrypted webhook callback while the customer sees an instant success confirmation.

Applications

Target use cases & audiences.

D2C Brands & Online Stores

Storefront Checkout

Increase cart checkout completion by offering one-tap UPI and saved card options.

SaaS & Subscription Businesses

Plan Upgrades & Invoices

Collect invoice settlements and upfront plan payments with automatic GST invoice generation.

EdTech & Course Platforms

Instant Course Enrollment

Enable learners to purchase subscriptions or courses without navigating away from the page.

Security & Compliance

Enterprise-grade financial defense.

Protected by multi-layered encryption, certified hardware modules, and strict regulatory standards.

Bank-Grade Encryption

TLS 1.3 encryption in transit and AES-256 GCM at rest for all transaction payloads.

FIPS 140-2 HSM Vault

Sensitive PIN blocks and biometric PID data are processed strictly in hardware modules.

RBI & NPCI Standards

100% compliant with national operating circulars, data localization, and tokenization rules.

T+0 Audit & Reconciliation

Deterministic idempotency keys and automated transaction ledger balancing.

Frequently Asked Questions

Everything you need to know.

Yes, you can easily customize the brand logo, primary accent color, font family, and button styling to seamlessly match your website's visual identity.
Start Building Today

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Join thousands of retail agents, digital platforms, and merchants who rely on paywiththem for fast, secure, and compliant financial infrastructure across India.

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