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Backend & Integration

API Development &
Integration Services

We build secure, well-documented REST and GraphQL APIs and integrate any third-party service — payment gateways, CRMs, ERPs, logistics, and more — into your platform.

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300+APIs Built & Integrated
99.9%Uptime SLA
50+Third-Party Services
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Why It Matters

Connect Every System. Automate Every Workflow.

Modern businesses run on connected systems. A well-designed API is the backbone that lets your website, mobile app, CRM, ERP, and third-party tools talk to each other seamlessly — reducing manual work and unlocking automation at scale.

  • RESTful and GraphQL API design following OpenAPI 3.0 standards
  • Secure authentication — JWT, OAuth 2.0, API keys, and rate limiting
  • Payment gateway integration — Razorpay, Stripe, PayU, Cashfree
  • CRM & ERP integration — Salesforce, Zoho, SAP, HubSpot
  • Webhook development for real-time event-driven workflows
  • Full API documentation with Swagger / Postman collections
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What We Build

Complete API Development & Integration Services

From custom API design to complex third-party integrations — we handle the full spectrum of backend connectivity.

🔗

Custom REST API Development

Scalable, versioned REST APIs with proper HTTP methods, status codes, pagination, filtering, and full OpenAPI documentation for your web and mobile apps.

⚡

GraphQL API Development

Flexible GraphQL APIs that let clients request exactly the data they need — reducing over-fetching, improving performance, and simplifying frontend development.

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Payment Gateway Integration

Seamless integration of Razorpay, Stripe, PayU, Cashfree, PayPal, and UPI — with webhooks for payment confirmation, refunds, and subscription billing.

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Webhook & Event Systems

Real-time event-driven webhooks that trigger actions across your systems — order confirmations, inventory updates, CRM sync, and automated notifications.

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CRM & ERP Integration

Bi-directional sync between your platform and Salesforce, Zoho CRM, HubSpot, SAP, Tally, or custom ERP systems — keeping data consistent across tools.

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API Security & Optimisation

JWT and OAuth 2.0 authentication, rate limiting, IP whitelisting, input validation, CORS policies, and performance optimisation for high-traffic APIs.

Our Work

APIs & Integrations We've Delivered

API analytics dashboard
Server and backend infrastructure
Development team working on integrations
How We Work

Our API Development Process

1

Requirements & Design

We map your data flows, define endpoints, authentication strategy, and create an API contract before development begins.

2

Development & Testing

API built with unit tests, integration tests, and load testing to ensure reliability under real-world traffic conditions.

3

Documentation

Swagger UI, Postman collections, and developer guides so your team or third parties can integrate quickly and confidently.

4

Deploy & Monitor

Production deployment with uptime monitoring, error alerting, versioning strategy, and ongoing maintenance support.

Technology

Tech Stack We Use

🟢 Node.js 🔴 Laravel 🐍 Python / FastAPI ⚡ GraphQL 🔗 REST / OpenAPI 3.0 🔐 JWT / OAuth 2.0 🐬 MySQL 🍃 MongoDB ⚡ Redis Cache ☁️ AWS API Gateway 📬 Postman / Swagger 💳 Razorpay / Stripe
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"Muspl built our entire API layer connecting our website, mobile app, and ERP system. The documentation was excellent and our in-house team could extend it easily. Zero downtime since launch."
Vikram Nair
Vikram Nair CTO, RetailEdge Platforms, Mumbai
FAQ

API Development — Common Questions

REST APIs use fixed endpoints that return predefined data structures. GraphQL lets clients request exactly the fields they need in a single query, reducing over-fetching and under-fetching. We recommend REST for simple CRUD operations and GraphQL for complex, data-heavy applications.
We implement JWT tokens, OAuth 2.0, API key authentication, rate limiting, IP whitelisting, HTTPS enforcement, input validation, and CORS policies. For sensitive data, we add field-level encryption and audit logging.
Yes. We have experience integrating with Salesforce, Zoho, HubSpot, SAP, Tally, and custom ERP systems. We use official APIs where available and build custom middleware connectors where needed.
Yes — every API we build includes Swagger UI documentation, Postman collections, and a developer guide covering authentication, endpoints, request/response examples, error codes, and versioning strategy.
A simple CRUD API takes 1–2 weeks. A medium-complexity API with authentication, multiple modules, and third-party integrations takes 3–6 weeks. Complex microservices architectures take 2–4 months depending on scope.
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Ready to Connect Your Systems with a Powerful API?

Get a free consultation and technical assessment. We'll design the right API architecture for your business needs.

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