Provider and merchant-account review
Confirm the merchant country, business category, settlement currency, supported products and account eligibility before development.
International payment gateway integration
Connect international payment providers to your website, app or software.
Kailvex integrates supported international payment provider APIs for eligible merchant accounts, with server-side order creation, secure checkout, verification, webhooks and operational status handling.
Clear written scopeClient-owned accountsThird-party fees separatedNo approval guarantees
What we deliver
International payments connected to the actual order and support workflow.
The integration is designed around provider eligibility, currency, merchant ownership and reliable status handling. Kailvex is an integration provider, not the payment processor, merchant of record or account approver.
Hosted checkout or API integration
Use the provider’s supported checkout or API model while keeping secret keys and sensitive operations on the server.
One-time and recurring payments
Implement supported purchases, subscriptions, invoices or booking payments according to provider capabilities and the written scope.
Multi-currency and localisation
Display and send supported currencies carefully while documenting conversion, settlement and tax dependencies.
Webhooks, refunds and status handling
Connect asynchronous events, refunds, failures, disputes or subscription changes to internal business records where supported.
Sandbox, production and reconciliation
Test provider scenarios, deploy approved live credentials and retain transaction references for operational review.
Suitable use cases
Scope the service around the application and business responsibility.
Availability and implementation depend on the selected platform, provider account, existing codebase and written acceptance criteria.
International ecommerceSaaS subscriptionsDigital servicesBookingsCross-border invoicesMobile applications
Ownership and third-party responsibility
Provider accounts, billing, KYC, legal declarations, platform policies and ongoing third-party charges remain with the client. Kailvex implements and supports the agreed technical scope without representing itself as the infrastructure provider, app-store reviewer or payment processor.
Delivery process
A controlled route from review to production.
Each stage produces a clear decision, configuration or test result before the next step.
Eligibility review
Confirm provider availability, merchant country, currency, business model and account approval.
Payment architecture
Map internal orders, customer identity, checkout, settlement and exception states.
Secure implementation
Build server-side payment creation, verification, webhooks and supported refund flows.
Controlled production launch
Validate sandbox cases, live credentials, logging and operational reconciliation.
Frequently asked
Important questions before starting.
Final scope, timelines and support terms are confirmed in the proposal after reviewing the project and third-party requirements.
Which international payment gateways can you integrate?+
Kailvex can work with supported provider APIs such as Stripe, PayPal and other platforms when they are available to the client’s country, business category, currency and approved account.
Can you create or approve the merchant account?+
No. The provider controls registration, KYC, underwriting, reserves, settlement and account approval. The client must own the account and provide approved credentials.
Do you guarantee international payments will work in every country?+
No. Availability varies by provider, merchant location, customer location, currency, product type and local regulation. The supported countries and transaction model are confirmed before implementation.
Can you integrate subscriptions and recurring billing?+
Yes, when the selected provider and approved merchant account support the required recurring model. Cancellation, retries, taxes and customer communication must be scoped.
Does Kailvex handle card data directly?+
Hosted checkout or provider-managed components are preferred where practical. The client remains responsible for the applicable compliance obligations, policies and provider agreements.
Start with clarity
Planning an international checkout or subscription workflow?
Share the current platform, accounts, codebase, expected outcome and timeline. Kailvex will review the practical next step and identify any provider dependency before quotation.
Kailvex Technologies
Documented software, integration and infrastructure delivery.
Kailvex combines clear scope, secure implementation, client-owned accounts and practical post-launch support for businesses across India and selected international projects.