Custom Software, ERP & SaaS
API Development & Integration
Connect your systems: payment, GST, Tally, WhatsApp, government and partner APIs. When ready-made software does not fit, we build it: ERP, CRM, HRMS, billing and inventory systems, SaaS products and integrations.
What you get
- REST / GraphQL APIs
- Payment gateway and UPI
- GST, e-invoice and DigiLocker
- WhatsApp and SMS
- API documentation
Business results
What api development & integration does for you
- Software that follows your process, not the other way round
- Role-based access, audit trail and reports
- Integration with Tally, GST, payment and government APIs
- Multi-tenant SaaS ready to sell
Technology
Tools and platforms we use
Node.js / NestJSPython / DjangoJava / Spring.NETPostgreSQLRedisDocker
Not sure about the cost?
Our AI cost estimator gives you a price and timeline range in about a minute.
Estimate my projectProcess
How we deliver
- Step 1
Discovery call
A free 30-minute call to understand your business, users and goals. NDA signed if needed.
- Step 2
Plan & proposal
Scope, screens list, technology, timeline and a fixed or monthly price, in writing.
- Step 3
Design
Wireframes and visual design you can click through before any code is written.
- Step 4
Build in sprints
Working software every 1-2 weeks on a test link, so you see progress and give feedback.
- Step 5
Test & launch
Functional, security and speed testing, then go-live with data migration and training.
- Step 6
Support & grow
Monitoring, fixes, new features, SEO and marketing to make the product successful.
FAQ
API Development & Integration: common questions
How much does api development & integration cost?
It depends on scope and features. Use our free cost estimator for a quick range, or share your requirement and we send a written quote within 1-2 working days.
How long does api development & integration take?
Small projects take 2-4 weeks; larger ones are planned in 4-8 week phases with working releases along the way.
Do we own the source code?
Yes. On project engagements the source code and IP are handed over to you after final payment.
Can you customise ATTPL CRM or HRMS for us?
Yes. Many clients start on our CRM / HRMS and we add the modules they need, which is faster and cheaper than building from zero.
Do you sign an NDA?
Yes, before any detailed discussion.
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Let's discuss your api development & integration project
Tell us in two minutes. A senior ATTPL IT consultant calls you back with a plan, timeline and cost range. Free, no obligation.