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API Integration Services

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API Integration Services in Kolkata, India

Overview of API Integration by SD Team

Modern websites and web applications thrive on connectivity. Whether it’s processing payments, sending alerts, or enabling social logins—API integration is what makes your digital platform intelligent, responsive, and user-friendly.

At Shirsendu and Team (SD Team), we specialize in secure, performance-optimized API integrations for all kinds of web applications. From payment gateways and messaging APIs to social and business platforms—we ensure your website connects flawlessly with the services your users rely on.

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API Integration Services in Kolkata, India

Services Offering

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API Integration Services in India

Enable smooth and secure transactions on your website or app. We integrate widely used payment gateways to facilitate online payments, subscriptions, or donations.

Supported APIs include:

  • Razorpay
  • PayPal
  • Stripe
  • Instamojo
  • Paytm
  • Cashfree, and more
    All integrations are PCI-compliant, with secure callback handling and fraud protection logic.

API Integration Services in India

Automate customer communication through the most popular messaging app—WhatsApp. From notifications to chatbot conversations, our API integration helps streamline your outreach.

Use Cases:

  • Order/status notifications
  • Booking confirmations
  • Automated replies
  • CRM and chatbot support
  • Broadcast messages (via WhatsApp Business API)

We integrate with Meta’s WhatsApp Business API or third-party providers like Twilio, Interakt, Gupshup.

API Integration Services in India

Reach your users instantly with OTP, alerts, or promotional SMS—integrated directly into your system.

Top SMS APIs we work with:

  • MSG91
  • TextLocal
  • Twilio
  • Fast2SMS
  • Kaleyra

Use Cases:

  • Two-factor authentication (2FA)
  • Order updates
  • Subscription alerts
  • Bulk promotional SMS

🚀 We optimize for delivery speed, sender ID setup, and DLT compliance in India.

API Integration Services in India

Enhance user experience with social login, content sharing, and data sync through popular platforms.

We integrate:

  • Google Sign-In
  • Facebook Login
  • Instagram Feed & Login
  • LinkedIn Auth
  • Twitter APIs
  • YouTube Embeds & Stats

Benefits:

  • Frictionless sign-up and login
  • Real-time content feeds
  • Lead generation via social data
  • Custom audience building

All integrations are built with OAuth 2.0 protocol for secure access and token-based control.

Why API Integration is a Game-Changer for Your Business? - Here’s Why

API Integration Services in India

Centralized Operations

Connect all your tools—like CRM, payment gateways, or messaging apps—into one smooth workflow for easier management.

API Integration Services in India

Increased Efficiency Through Automation

Eliminate repetitive tasks and manual data entry by automating communication between systems, saving time and reducing errors.

API Integration Services in India

Better User Experience

Enable real-time updates, instant notifications, and seamless services like payment, messaging, or social login for smoother user journeys.

API Integration Services in Kolkata

Secure & Reliable Data Exchange

We use secure protocols and token-based authentication to ensure that all integrations protect your business and user data.

API Integration Services in Kolkata

Customizable & Scalable

Our API solutions are built to evolve—integrate new platforms or features as your business grows, without rebuilding from scratch.

API Integration Services in Kolkata

Quick Troubleshooting & Support

With structured logs and clear documentation, we ensure any integration issues are resolved quickly, minimizing downtime.

Why Choose SD Team for API Integration?

Know the Comparison – API Integration Development Services

Criteria
In-House Team
Shirsendu and Team (SD Team)
Freelancer
API Expertise
API Expertise
API Expertise May be limited to internal platforms
Proven experience integrating 40+ APIs (payment, SMS, WhatsApp, social, custom APIs)
May handle only basic integrations
Security Standards
Security Standards
Varies by developer skill level
OAuth 2.0, webhooks, encryption, DLT compliance implemented as default
Often lacks secure token handling or fallback mechanisms
Multi-API Integration
Multi-API Integration
May require different internal teams
Flawless integration of multiple APIs in one platform (e.g., WhatsApp + SMS + Payment)
May struggle to coordinate multiple API endpoints
Support & Maintenance
Support & Maintenance
Internal support limited to office hours
24/7 monitoring, update handling, key renewal, fallback strategies
Post-integration support may be limited or unavailable
Documentation & Handover
Documentation & Handover
Usually informal or undocumented
Full documentation, use-case guides, and key/token handling instructions
Often no documentation provided
Cost Effectiveness
Cost Effectiveness
Higher cost due to in-house overheads
Affordable with structured planning, no ongoing burden
Low upfront cost, high risk in the long term
Platform Versatility
Platform Versatility
Restricted to current tools or CMSs
Works with any stack: WordPress, Laravel, Yii, Magento, CodeIgniter, etc
Often tied to specific technologies or templates

Receive your project plan with cost and timeframe within 48 hours. (Get in touch)

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API Integration Web Development Process at Shirsendu and Team

WHAT WE DO

API REQUIREMENT DISCOVERY

We analyze your platform needs, business goals, and user flow to determine which APIs fit best.

AUTHENTICATION SETUP

We handle API keys, access tokens, DLT registration (if SMS), and secure web hook URLs.

INTEGRATION & LOGIC HANDLING

We configure the API with your backend to fetch, send, or sync data in real time—based on logic and triggers.

TESTING & VALIDATION

Each use case is tested for accuracy, error-handling, and response speed before go-live.

MONITORING & SUPPORT

We monitor performance and offer maintenance for API upgrades, downtime handling, or API key renewals.

Recent API Integration Development (API Integration Development portfolio)

Technologies We Use

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API Integration Development Services for Every Industry

API Integration Development Priceing

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What our client's Says about our service


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Projects Delivered On-Time On-Budget

M+

USD Saved by our expert advice

%

Clients Ring back for Enhancement in their business

4.8 Rating on google
1,200+ Likes & Follows on facebook
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FAQ’s For API Integration Website

Usually 1 to 5 working days, depending on the type of API and complexity of data logic.
Yes. We will help you generate keys, register accounts, or handle DLT registrations if required.
Absolutely. We regularly integrate multiple services like payment, WhatsApp, and SMS into the same website/app.
Yes. We offer ongoing support, updates, and maintenance packages to handle API version changes.