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API Development & Integration Services

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Zapwhizz provides custom API development and integration services that connect applications, automate workflows, and securely exchange data between platforms. Our API developers build REST, GraphQL, SOAP, and real-time integrations for CRMs, ERPs, eCommerce platforms, payment systems, mobile applications, and custom business software.

API Development Services

Developing a Custom REST API

Clean REST APIs with versioning, pagination, validation, and best-practice answer formats, designed for frontend and mobile use.

API Integration and Automation

Integrate CRMs, payment gateways, shipping tools, marketing platforms, and internal systems using dependable middleware and structured logging.

GraphQL API development

Flexible APIs for dashboards and complicated apps can reduce over-fetching, enhance performance, and keep the frontend responsive.

WebSocket and Real-Time APIs

Live pricing, chat, tracking, and analytics streams, low latency real-time updates using scalable pub/sub patterns.

API Security and Authentication

OAuth2, JWT, API keys, RBAC, IP limitations, encryption, and secure audit logging—all designed to protect your data.

API Documentation and Maintenance.

Swagger/OpenAPI docs, Postman collections, changelogs, monitoring dashboards, and support for upgrades and bug fixes.

Platforms and Systems We Integrate

Disconnected platforms harm productivity. Our API integration services create smooth data flow. We bridge your various tools, so when data updates in one place, it shows up everywhere else immediately. This removes manual entry, cuts errors, and allows your team to focus on important tasks instead of fixing data sync problems.

1. CRM and Business Systems

Salesforce API Integration

We connect Salesforce with finance, inventory, service, or internal systems so opportunity, account, and order data remain aligned across teams.

HubSpot API Integration

We build reliable integrations for campaign triggers, lead routing, lifecycle updates, attribution data, and accurate marketing reporting.

Zoho API Integration

We synchronize Zoho CRM and Zoho business tools with your operational systems for cleaner data and unified management.

GHL API Integration

We create custom GoHighLevel workflows for agencies, including client reporting, lead distribution, automation triggers, and scalable sub-account processes.

Workday API Integration

We connect HR, finance, payroll, and operational data securely so your organization can maintain consistent reporting and workflows.

NetSuite API Integration

We connect your back-office financial records with sales, fulfillment, service, and customer-facing platforms.

2. eCommerce and Payment Platforms

For e-commerce and retail businesses, integrations directly affect revenue, fulfillment speed, payment reliability, inventory accuracy, and customer experience.

Shopify API Integration

We support headless storefronts, live order fulfillment tracking, and automated inventory management.

Payment Gateway API Integration

We create secure connections for payment gateway processing. This includes handling multi-party marketplace routing, complex split payments, and recurring subscription billing.

Stripe API Integration

We use Stripe APIs to build custom checkout flows, recurring billing systems, secure payment logic, and automated financial reconciliation.

Clover API Integration

We connect physical retail POS systems with cloud dashboards, inventory platforms, customer tools, and operational reporting systems.

3. Communication and Automation Platforms

Modern applications need real-time communication, automation, location intelligence, and event-driven data movement to create responsive customer experiences.

WhatsApp API Integration

We integrate customer support alerts, conversational commerce, appointment reminders, notifications, and automated messaging into your workflows.

Google Maps API Integration

We enable geofencing, live fleet tracking, route intelligence, address validation, and custom location experiences for operational applications.
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Zapier API Integration

When native automation is not enough, we build private apps and custom Zaps that support your specific internal workflows and business logic.

API Styles and Integration Protocols

We Offer All of the Web Development services that your organization demands.

REST APIs

Best for most web and mobile apps. Structured endpoints, predictable responses, caching support, and wide compatibility across all platforms.

SOAP APIs

Used in enterprise and legacy systems. Strong standards for strict contracts, security, and integration with older business software.
Web development

GraphQL APIs

Perfect for situations where flexible data is required by the frontend. Clients request exactly what they need—faster apps, fewer requests, cleaner UI performance.
web socket api

WebSocket APIs​

Built for real-time communication. Perfect for live dashboards, chat systems, order tracking, trading data, and monitoring streams.​
Webhooks

Webhooks

Enable applications to automatically send updates when a specific event occurs. Webhooks are commonly used for payment confirmations, CRM updates, order notifications, and workflow automation.
gRPC APIs

gRPC APIs

A high-performance protocol for communication between internal services and microservices. gRPC supports fast data exchange, strongly typed contracts, and efficient communication across distributed systems.

Our API Development Tech Stack

We build APIs using modern, production-ready tools—selected based on speed, scale, and maintainability:
  • Backend: Node.js, Go, Python, Laravel
  • API Styles: REST, GraphQL, WebSockets, SOAP
  • Auth: JWT, OAuth2, API Keys, RBAC
  • Databases: MySQL, PostgreSQL, MongoDB, Redis
  • DevOps: Docker, CI/CD, Nginx, Cloud Deployments
  • Monitoring: Logs, metrics, alerts, performance tracking
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api architecture

Procedure for Developing APIs

We Offer All of the Web Development services that your organization demands.

Discovery & Requirements​​

Recognize data, flows, and integrations. Describe edge cases and success metrics.​

API Architecture & Design​

Rate limits, versioning, endpoints, schemas, authentication, and security strategy.​

WhatsApp API Integration

Build services + connect databases/third-party APIs with clean code standards.​

Testing & Validation​

Unit/integration tests, error handling, load checks, and response consistency.​

Deployment & Documentation​

CI/CD (if necessary), Postman, Swagger/OpenAPI, and environment setup.​

Monitoring & Support ​

Logs, alerts, bug fixes, performance tuning, and future enhancements.​

FAQ

REST is suitable for regular applications and predictable endpoints. GraphQL is suitable for flexible UIs and reducing the number of requests.
Yes—it includes documentation, and it includes a Postman collection to make it easy to integrate and test.
Yes. We take care of integrations, webhooks, retries, and logging so that your automation remains reliable in production.
We implement JWT / OAuth2, RBAC, input validation, rate limits, encryption, and audit logs based on your system needs.
Yes, using WebSockets and Event-driven Architecture for chat, tracking, analytics, etc.
Absolutely—performance tuning, refactors, fixes, endpoint cleanup, versioning, and documentation updates.

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