Our systems don't talk to each other.
RESTful and GraphQL APIs built specifically to connect the tools you already run.
Service
API Development & Integration
RESTful APIs, GraphQL APIs, third-party integrations, payment gateways, CRM/ERP integrations, and middleware development.
Sound Familiar?
The problems we get called in to fix.
If you recognise two or three of these, it's worth a conversation.
Every new integration takes weeks of guesswork.
Clean, documented middleware that makes the next integration faster, not harder.
Payment or CRM data lives in silos.
Direct integrations with your payment gateway, CRM, or ERP — no manual syncing.
Your API breaks every time you change something internally.
Versioned APIs designed so internal changes don't break external consumers.
Third-party integrations keep timing out or failing silently.
Middleware with proper retry logic, logging, and failure alerts.
Nobody has documented what your APIs actually do.
Clear API documentation so your team — and ours — isn't guessing.
In Short
What api development & integration involves.
Most businesses run five to ten tools that don't talk to each other, so someone re-types orders, leads or invoices between them. We build documented REST and GraphQL APIs and integrations that move that data automatically, with retries, logging and alerts when a third-party service fails.
Trusted by 40+ companies
What's Included
Where this service applies.
Not an upsell list — this is what's actually covered under api development & integration.
RESTful APIs is included in API Development & Integration, scoped in your written quote.
GraphQL APIs is included in API Development & Integration, scoped in your written quote.
Third-party integrations is included in API Development & Integration, scoped in your written quote.
Payment gateways is included in API Development & Integration, scoped in your written quote.
CRM/ERP integrations is included in API Development & Integration, scoped in your written quote.
Middleware development is included in API Development & Integration, scoped in your written quote.
RESTful APIs
RESTful APIs is included in API Development & Integration — scoped to what your project actually needs and listed in the written quote.
Who It's For
Who asks us for api development & integration.
The situations people are usually in when they ask us for this.
01
Website to CRM or ERP
Orders, enquiries and payments flowing from the website into the CRM, ERP or accounting system without manual entry.
02
Backend for a mobile app
A secure, versioned API that a Flutter, Android or iOS app can rely on.
03
Partner and marketplace feeds
Sharing stock, prices or orders with distributors, marketplaces and logistics partners.
04
Replacing fragile scripts
Swapping one-off scripts and CSV uploads for integrations that log every run and alert on failure.
Scope Estimator
Rough out your timeline in ten seconds.
Pick what you're building and we'll show an honest range. It's an estimate, not a quote — but it's the same maths we start from.
01 — What are you building?
02 — How big is it?
03 — Anything else? (optional)
How A API Development & Integration Engagement Runs.
Six stages from first call to live delivery — nothing advances until the stage before it is signed off.
01
Discovery
2–3 daysWe work out what actually has to be solved — the constraints, the users, and what can be cut from scope.
02
Scoping
3–5 daysA concrete plan agreed before anything is built, so nothing gets rebuilt later because of a missed assumption.
03
Design & Architecture
1–2 weeksThe technical approach and any interface work, reviewed with you until the direction is signed off.
04
Build
2–8 weeksBuilt in short cycles with visible progress — you see it working early and often, not just at the end.
05
QA & Launch
1–2 weeksTested against real conditions before it goes live, then deployed with a rollback plan in place.
06
Support
OngoingPost-launch fixes, monitoring, and improvements. You keep everything either way.
Quality Bar
The commitments we hold ourselves to on api development & integration.
Not aspirations — the same terms on every engagement, regardless of scope.
100%
Scope agreed in writing
Before any work starts
24h
Typical response time
During an active engagement
Tools We Use
What we use for api development & integration.
Chosen per project, not by habit — the right tool for your scale, your team, and what you'll need to maintain.
Node.js
Python
Laravel
PostgreSQLGrGraphQL
SwSwagger / OpenAPI
ReRedis
AWSRelated Work
Real projects in this space.
Client Voices
What clients say once we ship.
40+Companies trust us
11Industries served
We were able to successfully complete the project by meeting the best partner. They have a very good understanding of development and skills, and are fully committed to the task schedule.
Their communication and problem-solving skills are top-notch. The entire workflow was smooth and professional.
Amazing team! Delivered everything on time with exceptional quality. Totally recommend!
Honestly, we were struggling to keep up with our growth until they stepped in. They didn't just build the tech; they actually understood our users. It's been a total game-changer for our workflow, and the design is just spot on.
What I love most is that they don't just say 'yes' to everything — they tell us what's actually going to work. The whole process felt super collaborative, and they genuinely cared about making the project a success.
Our Principles
Two commitments that govern every project.
No deadline we don't hold ourselves to.
We pad the schedule honestly upfront so we don't have to renegotiate halfway through. If we say a date, we hit it.
DeliveredNo progress you can't see.
We don't go dark for a month and come back with a surprise. You see the work as it happens.
VisibleOur Technology Stack
We use modern, battle-tested tools to build scalable and maintainable solutions.
Frontend & UI
Backend Core
Data & Storage
Cloud & DevOps
Design & UX
Security & QA
99.9%Uptime SLA
2xFaster Delivery
Top 1%Engineering Talent
What You Receive
Everything, at handover.
Here is the exact list of what lands in your accounts when the project closes.
01
Domain access
Your domain is registered in your name, with full access to it — DNS, renewals, and transfers stay in your hands.
02
Admin access
A login to the admin panel, so your team can manage content without touching code.
03
Design files
Any design files used to plan the build, so future work doesn't start from scratch.
04
Handover walkthrough
A live session showing your team how to use everything we built.
Everything above transfers to your accounts when the project closes.
Why Us
What you're actually comparing for api development & integration.
A template, a freelancer, and a big agency all solve part of the problem. Here's where each one tends to leave you exposed.
CodelixTemplate / builderFreelancerLarge agency
Timeline you can hold us toYesYesNoPartial
Built for your exact workflowYesNoMaybeYes
One team, one point of contactYesNoYesNo
Post-launch support & docsYesNoMaybeYes
Transparent, fixed pricingYesYesMaybeNo
Won't vanish mid-projectYesYesNoYes
YOU GET THE DOMAIN.YOU GET THE ADMIN.FIXED SCOPE.FIXED PRICE.
FAQ
Questions we're asked before every engagement.
Don't see yours here? Ask us directly →
REST suits most integrations and public APIs because every tool supports it. GraphQL helps when several apps need different slices of the same data. Many systems use REST for partners and GraphQL for their own frontends.
Yes, where the software exposes an API or import format. Tally integrations usually go through its XML/ODBC interface; Zoho, Shiprocket and most payment gateways have REST APIs.
Calls are retried with back-off, failed records are queued instead of lost, and you get an alert. Nothing silently disappears.
Fixed scope, fixed price — you get a written quote before any work starts, based on what you actually need, not an hourly guess.
Every project includes a post-launch support window for fixes. After that, you can keep us on a monthly retainer for updates, fixes, and support.
What Happens Next
Three steps from here to kickoff.
No drawn-out sales process. Reach out and here's exactly what follows.
01
Discovery call
A no-pressure call to understand what you're building and what's not working. No slide deck, no sales pitch.
02
Written proposal
A clear scope, a fixed price, and a timeline — in writing. You know exactly what you're getting before you commit.
03
Kickoff
We lock the scope and start. You get a point of contact and visible progress from day one.
Explore More
The rest of what we do.
01
Workflow AutomationBusiness process automation, custom workflows, no-code/low-code automation, and system integrations.
→02
ERP & CRM DevelopmentCustom ERP, CRM, inventory management, HRMS, manufacturing software, and enterprise business applications.
→03
AI Agent DevelopmentCustom AI agents, autonomous workflows, AI copilots, and intelligent assistants for businesses.
→04
Generative AI SolutionsLLM-powered applications, AI chatbots, content generation, RAG systems, and AI-powered search.
→05
Cloud Infrastructure ServicesAWS, Azure, Google Cloud deployment, DevOps, Docker, Kubernetes, CI/CD, and server management.
→06
UX Research & Design SystemsUser research, usability testing, wireframing, prototyping, design systems, and accessibility improvements.
→Start Here
Tell us what you're building.
We'll tell you how we'd build it.
A structured conversation about api development & integration — your users, your goals, your constraints. We scope what should be built first, what can wait, and what it takes to ship it.