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API Integration

API Integration

REST API design and integration for CI4, Laravel, WordPress, and Shopify - connecting your eCommerce, ERP, CRM, payment gateways, logistics, and WhatsApp. We have connected Razorpay, Shiprocket, Unicommerce, HubSpot, Auth0, and Brevo on live client platforms.

REST
API architecture
Live
Integrations shipped
0
Manual data entry
Discuss Your Integration See Our Work
REST + Webhooks
Architecture we build on
Payments, CRM, ERP
Integrations we ship
CI4, Laravel, WP
Backend stacks we use
JWT + OAuth2
Auth standards we implement
The Problem

Disconnected systems that should talk to each other.

Every manual step between your platforms is a chance for error, delay, and wasted staff time. These are the six most common ones we eliminate.

Orders exported to Excel, re-entered into ERP

Your team exports Shopify or WooCommerce orders every morning, formats them in Excel, and manually enters them into your ERP or warehouse system. Every step is a delay and an error risk.

Inventory not synced between store and warehouse

Your Shopify store shows 12 units. Your warehouse system shows 3. Overselling, manual updates, and angry customers. The data exists - it is just not connected.

Customers not notified when orders ship

Your logistics partner updates tracking on their portal. Your customer does not know. Your support team gets 20 WhatsApp messages asking "where is my order?" every day.

Payment failures with no automated follow-up

A Razorpay payment fails. Your platform does not catch the webhook. The order sits in a limbo state. The customer thinks they paid. Nobody follows up.

CRM contacts not syncing from web forms

Leads from your website fill a form. Someone copies them into HubSpot manually every few days. Some are missed. The sales team works from a stale list.

Mobile app not connected to your existing backend

Your web platform has the data. Your mobile app is a new silo. Building a proper REST API layer between them was never prioritised - so they run as two separate systems.

What We Integrate

Every platform we have connected on real client projects.

Not theoretical - these are integrations shipped to production. If your platform has an API, we can connect it.

Payments & Commerce
RPRazorpay SHShopify Storefront API SHShopify Admin API WCWooCommerce REST PYPayU
Logistics & ERP
SRShiprocket UNUnicommerce ICIncreff EIEasyEcom CUCustom ERP / REST
CRM & Marketing
HSHubSpot BRBrevo (Sendinblue) MCMailchimp MPMeta CAPI GAGoogle Analytics 4
Auth & Identity
A0Auth0 (OAuth2 + PKCE) JWJWT / RS256 GOGoogle OAuth2 SHShield Auth (CI4) OTOTP / Mobile Auth
Messaging & Notifications
WAWhatsApp Business API FBFirebase (Push / FCM) SMSMTP / Brevo TWTwilio SMS
Internal APIs We Build
CICI4 REST API LVLaravel Sanctum API WPWordPress REST API GQGraphQL (Shopify) WHWebhook systems
Six Service Types

The API work we take on.

REST API Design & Build

Design and implement a clean REST API on your CI4, Laravel, or WordPress backend - versioned endpoints, consistent response shapes, proper status codes, rate limiting, and API key auth. For mobile apps, third-party consumers, or internal tool access.

Fixed-price or T&M

Webhook Integration

Receive events from Razorpay, Shiprocket, Shopify, or any platform that sends webhooks - validate signatures, parse payloads, trigger downstream actions, and log everything. We have built payment failure handlers, shipment update processors, and inventory sync webhooks.

Fixed-price

ERP & Inventory Sync

Bi-directional sync between your eCommerce platform and ERP or warehouse management system - order push, inventory pull, shipment status update. Built for Unicommerce, Increff, and custom REST ERPs. Scheduled jobs or event-driven via webhooks.

Fixed-price

OAuth2 & SSO Integration

Auth0 OAuth2 + PKCE with JWT/RS256 verification, role mapping from external metadata, cookie-based state management, and rate limiting. Built for WordPress, CI4, and Laravel. We have shipped this for financialdataexchange.org as a full mu-plugin.

Fixed-price

WhatsApp & Notification APIs

WhatsApp Business API integration for order confirmations, shipping updates, OTP delivery, and support automation. Firebase FCM for mobile push. SMTP via Brevo for transactional email. Triggered by platform events, not manual sending.

Fixed-price or T&M

Legacy Wrapper API

Wrap your legacy platform in a REST API layer without a full rewrite. Enables mobile apps, partner integrations, and third-party tools to consume your data cleanly - without touching the underlying system. Common first step in legacy modernisation.

T&M or fixed-price
Our Approach

How we build integrations that do not break.

1
Map the data flow first

Before any code - draw what goes where. What triggers what. What data transforms. What happens when it fails. Integration bugs almost always come from assumptions made at this stage, not bad code.

2
Build in a sandbox, validate against production data

Every payment gateway and logistics API has a sandbox. We use it. We test with real order shapes, real edge cases, and real failure scenarios before touching your live environment.

3
Fail loudly, log everything

Every webhook received is logged. Every API call logged with request and response. Failed events are queued for retry, not silently dropped. You can see exactly what happened and when.

4
Document the contract

Every endpoint documented: URL, method, request body, response shape, error codes. Postman collection or Swagger doc included. Your next developer will not guess.

Real Example

Auth0 OAuth2 for financialdataexchange.org

✓
Auth0 OAuth2 + PKCE with custom WordPress mu-plugin
✓
JWT/RS256 verification against JWKS endpoint
✓
Role mapping from HubSpot contact metadata
✓
Cookie-based state management, rate limiting
✓
Security audit performed post-build - zero critical findings
Standards we build to
REST
API architecture
JWT / RS256
Token auth
OAuth2 + PKCE
SSO standard
Webhook signing
Payload validation
Retry queues
Failure handling
Postman / Swagger
API documentation
Pricing

Indicative ranges for common integration work.

Complexity varies significantly by platform and data volume. Every engagement is scoped before we quote.

Single Webhook
Rs 8K – 20K

One event, one handler. Razorpay payment, Shiprocket status update, etc.

Third-party Integration
Rs 18K – 45K

Full integration with one platform - HubSpot, Brevo, WhatsApp, Auth0, etc.

ERP / Inventory Sync
Rs 35K – 90K

Bi-directional sync with Unicommerce, Increff, or custom ERP system.

Full REST API Build
Rs 40K – 1.2L

Complete API layer for your platform - design, build, document, and secure.

All prices exclusive of GST. Fixed-price scope document provided before work begins. Get a quote

FAQ

Common questions about integration work.

Not sure where to start? Describe what you need connected and we will advise on the right approach.

Discuss Your Integration
Our platform was built by someone else. Can you still integrate it?
Yes. We start with a codebase audit to understand the architecture before writing any integration code. If your platform is a black box with no existing API, we can add a REST layer without touching the core application. If it has an API but it is undocumented, we reverse-engineer and document it first.
What if the third-party API changes or goes down?
Every integration we build includes error handling and logging. Failed webhook deliveries are queued for retry. API failures surface in your admin panel or trigger an alert - not a silent crash. For platforms with a habit of changing their API (it happens), we build version-tolerant handlers where possible and document upgrade paths.
Can you connect Shopify to our ERP?
Yes. We have connected Shopify to Unicommerce and Increff on live client platforms. The approach: Shopify webhooks push order events to your server, your server transforms and pushes to the ERP API, the ERP pushes stock updates back on a scheduled sync. We handle the mapping, transformation logic, and failure handling.
How do you secure the API you build?
API key authentication for machine-to-machine calls. JWT (HS256 or RS256) for user-authenticated endpoints. OAuth2 + PKCE for SSO flows. Webhook signature validation (HMAC-SHA256) for inbound events. Rate limiting on all public endpoints. All implemented as standard - not an optional add-on.
Do we get documentation with the integration?
Yes. Every integration ships with a Postman collection or Swagger/OpenAPI spec covering every endpoint - URL, method, headers, request body, response shape, and error codes. Plus a Notion document covering the integration architecture, data flow diagram, failure handling approach, and environment variables needed to run it.
We just need one webhook - is that too small a job?
No. Single webhook integrations are a standard T&M engagement. Share the webhook payload format, tell us what should happen when it fires, and we build, test, and deploy it. Starts at Rs 8,000. Most single-webhook jobs are done in a 4–8 hour session.
Client Work

Integration and platform work we have shipped.

All case studies
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Laravel SaaS

1JobTracker - Job Application Tracker

A job application tracker for people looking for work in the social impact sector, with a visual dashboard, a five-stage status pipeline, resume management and inactivity email nudges.

View case study
Video Home Services
Laravel Service Business

Lykan Water Solutions - RO Service Platform

Laravel site and admin for an RO water purifier sales and service business, with a product and accessories catalogue, eight service pages, city landing pages and WhatsApp-led booking.

View case study
Maluka Earthmovers — CI4 Security Migration Heavy Equipment / Construction
CodeIgniter 4 CI4 Shield

Maluka Earthmovers — CI4 Security Migration

Full security audit and CI4 Shield authentication migration for a heavy equipment company's operations portal.

View case study
MakeEasyBooking — Travel Booking Platform Travel & Tourism
Laravel Multi-page

MakeEasyBooking — Travel Booking Platform

A multi-page Jaisalmer travel booking platform with taxi booking, user accounts, booking confirmation, offers, and vendor onboarding.

View case study

Stop copying data between platforms. Connect them.

Describe what needs to be connected. We map the data flow, scope the work, and quote before we start. No guessing on scope.

Discuss Your Integration WhatsApp Us