API Integration Services
MIAR International Private Limited connects your software, website and mobile apps with the services your business already uses: payment gateways, WhatsApp and SMS providers, shipping partners, e-commerce platforms, accounting data and your own ERP or CRM. Good integration removes double entry, speeds up work and keeps data consistent across systems.
We design and build secure REST APIs for your own platforms, and integrate third-party APIs into existing systems, whether we built them or another company did. Every integration includes error handling, logs and alerts, so failures are visible and recoverable instead of silent.
Integrations we build
Payment Gateway Integration
Online payments, payment links, refunds and automatic payment reconciliation with Indian and international payment gateways, such as Razorpay.
WhatsApp, SMS & Email Integration
Order updates, OTPs, reminders, invoices and alerts sent automatically through the WhatsApp Business Platform, SMS gateways and email services.
E-commerce & Marketplace Integration
Sync products, stock, orders and prices between your website, online store and inventory system, so stock levels stay correct everywhere.
Shipping & Logistics Integration
Create shipments, print labels, track deliveries and update customers automatically using courier and shipping aggregator APIs.
ERP, CRM & Accounting Integration
Connect your ERP, CRM, website and apps so leads, orders, invoices and payments move between systems without manual re-entry.
Custom REST API Development
Secure, documented REST APIs for your mobile apps, partners and internal tools, with authentication, rate limits and versioning.
Common integrations
- ✓ Payment gateways & payment links
- ✓ WhatsApp Business Platform
- ✓ SMS & OTP gateways
- ✓ Email delivery services
- ✓ Courier & shipping APIs
- ✓ Google Maps & location services
- ✓ E-commerce platforms
- ✓ GST & e-invoicing services
What every integration includes
- ✓ Secure authentication & API keys
- ✓ Webhooks for real-time updates
- ✓ Retry logic for failed requests
- ✓ Detailed request & error logs
- ✓ Alerts when an integration fails
- ✓ API documentation for your team
- ✓ Testing on a staging environment
- ✓ Monitoring after go-live
Our API Integration Services Process
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STEP 1
Requirement discussion
We understand your business, users and current workflow, then list what the system must do.
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STEP 2
Scope & agreement
You receive a written scope with modules, screens and milestones, followed by a digital agreement.
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STEP 3
Design
Screen layouts and user flows are designed and shared for your approval before development.
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STEP 4
Development in milestones
Features are built in short milestones and shared on a staging link so you can test as we go.
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STEP 5
Testing & launch
Every module is tested, your data is migrated if needed, and the system goes live on your server or app store account.
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STEP 6
Training & support
Your team is trained, and the warranty period and optional maintenance keep the system running smoothly.
Technologies we use
Industries we serve
Why businesses choose us for API integration
Fixed, written scope
Every project starts with a documented scope and a digital agreement, so you know exactly what will be delivered before work begins.
10% advance to start
Work begins after the agreement is signed and a 10% advance is confirmed. The balance is linked to milestones you review and approve.
You own the code
Full source code, database and repository access are handed over to you on project completion and final settlement.
1-month warranty
Every delivery includes a one-month warranty for bug fixes, followed by optional maintenance plans.
Confidentiality
Your business data, ideas and documents are protected under a confidentiality agreement from the first conversation.
One accountable team
Design, development, testing, deployment and support are handled by one team in New Delhi, with a single point of contact.
Commercial Terms Applicable to API Integration Services
Projects initiate upon digital agreement execution and confirmed 10% advance payment. Remaining balance is milestone-governed.
Up to 5 bug-fix tickets are accepted free during month 1. Websites also include up to 3 minor modifications.
Continue full SLA support and receive proactive bug sweeps with our monthly corporate maintenance agreements.
API Integration Services: frequently asked questions
What is API integration?
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API integration connects two software systems so they can exchange data automatically. For example, when a customer pays online, the payment gateway can update the order in your software, generate the invoice and send a WhatsApp confirmation, all without anyone typing the data again.
Which payment gateways can you integrate?
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We integrate popular Indian and international payment gateways, such as Razorpay, into websites, apps and business software, including payment links, refunds, webhooks and automatic reconciliation.
Can you integrate WhatsApp into our software?
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Yes. Using the WhatsApp Business Platform through an approved provider, we can send order updates, reminders, invoices and alerts automatically, and receive replies into your CRM or support system.
Can you integrate APIs into software built by another company?
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Yes. We first review the existing code and database, then add the integration safely without disturbing current features. Access to the source code or server is needed.
Can you build APIs for our mobile app?
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Yes. We build secure REST APIs that power Android and iOS apps, with login, user roles, push notifications and data sync, and provide documentation for your team.
How do you keep integrations secure?
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We use encrypted connections, secure storage of API keys, signed webhooks, access tokens and role-based permissions. Every request is logged so issues can be traced quickly.
What happens if a third-party service is down?
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Integrations are built with queues and automatic retries, so requests are processed once the service is back. Failures are logged and can trigger an alert to your team.
How long does an API integration take?
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A standard integration such as a payment gateway or SMS provider is usually quick, while multi-system integrations are planned in milestones. You receive a written scope and timeline before work starts.
Related services
Custom ERP systems for inventory, purchase, sales, accounts, GST billing, HR and production in one place.
Custom CRM software for leads, follow-ups, sales pipeline, quotations and customer support.
Tailor-made enterprise software systems, automated ERPs, CRM platforms, and API-driven microservices.
Discuss your API integration project
Share your requirements and get a written scope and quotation from our team in New Delhi.