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API DEVELOPMENT

APIs That Connect Everything You Run.

Secure, well-documented REST and GraphQL APIs, plus dependable integrations with payments, CRMs, ERPs and AI services.

Developer working at dual monitors showing code and an analytics dashboard

Avg. response time

0 ms

API status

All systems operational

0 ms

Avg. response time

All systems operational

API status

THE CHALLENGE

Are Your Systems Talking to Each Other?

When tools don’t talk to each other, you get manual work, errors and slow service for customers.

Manual data entry

Teams copy data between systems.

Fragile integrations

Connections break with every update.

Slow responses

APIs that time out under load.

Security gaps

Open endpoints and leaked keys.

No documentation

Only one developer knows how it works.

Vendor lock-in

Hard to switch tools or scale.

Team planning a project at a glass wall covered in sticky notes
0 %

API uptime

OUR SOLUTION

Robust APIs, Built to Last

We design APIs the way we’d design a product: versioned, documented, monitored and secure.

WHAT'S INCLUDED

What's Included

REST APIs

Clean, versioned REST endpoints.

GraphQL

Flexible, efficient data access.

Third-Party Integration

CRMs, ERPs and SaaS tools.

Payment Gateways

Stripe, Razorpay, PayPal and more.

Webhooks & Events

Real-time, event-driven flows.

API Security

Auth, encryption and monitoring.

BENEFITS

Why It Matters for Your Business

0 ms

Avg. response time

0 %

Uptime

- 0 %

Manual data work

0 %

Documented endpoints

HOW IT WORKS

How It Works

01

Map

Systems, data and use cases.

02

Design

Endpoints, schemas and auth.

03

Build & test

Code with automated tests.

04

Monitor

Observability and alerts.

TOOLS & TECHNOLOGY

Technology & Tools

Backend

No

Node.js

La

Laravel

Py

Python

Ex

Express

API Tooling

Op

OpenAPI

Po

Postman

Gr

GraphQL

Sw

Swagger

USE CASES

Common Use Cases

Payments

Checkout and subscriptions.

CRM sync

HubSpot and Salesforce integrations.

Mobile backends

APIs behind iOS and Android apps.

Partner APIs

Share data with partners securely.

AI services

Connect LLMs to your data.

ERP integration

Orders, inventory and finance.

HOW WE WORK

Our Delivery Process

01

Discover

Goals, users and limits.

02

Plan

Scope, roadmap and KPIs.

03

Deliver

Sprints with a demo every week.

04

Launch

QA and launch support.

05

Improve

Measure and improve.

CASE STUDY

A Real Project, Real Results

Three colleagues laughing while collaborating around laptops at a shared office desk

Real Estate

API Development

Connecting a listing portal to 4 CRMs

“Leads now land in the right CRM in seconds instead of hours. It changed how fast our agents respond.”

-70%

Manual work

120ms

Response

4

Systems synced

FAQS

Frequently Asked Questions

Can’t find what you need? Our team is happy to help.

Priya Sharma, Avenix client

Still have questions?

Talk to a real person, not a bot.

REST or GraphQL?

It depends on your clients and data. We'll recommend what fits, and often that's both.

Yes. If it has an API, we can connect it.

OAuth2/JWT, rate limiting, input validation, encryption and audit logging.

Always. OpenAPI specs plus guides people can actually read.

KEEP EXPLORING

Related Services

Let's Connect Your Systems.

Tell us what needs to talk to what, and we’ll draw up a clean, secure integration plan.

Avenix team chatting over coffee in a bright, plant-filled lounge
Arjun Mehta, Founder & CEO of Avenix, ready to discuss your project

Talk to Arjun & the team

Usually replies in a few hours