API Integration
Software that cannot talk to other software creates manual work. We build and connect APIs so data moves on its own, and we build them to survive timeouts, retries and provider downtime.
API Integration for your business
- GST, PAN, KYC and bank verification
- Payment gateways and subscription billing
- WhatsApp, SMS and email delivery
- Accounting and e-invoicing connections
- Logistics, tracking and FASTag data
- Your own public API with docs and keys
At a glance
- Technology
- REST and webhooks, OAuth and key-based auth, queue workers, and our own Growable One gateway for verification APIs.
- Delivery
- Staged releases with demos
- Offices
- Coimbatore, Noida, Varanasi, Nagpur
- Support
- Included after launch, with plans
From first call to supported product
Contract
We agree inputs, outputs, errors and limits before writing code.
Build
Authentication, validation, idempotency and clear error messages.
Harden
Timeouts, retries, fallbacks and rate limits.
Observe
Request logs, alerts and a dashboard for failures.
Document
A public or private reference with examples, so the next developer is not lost.
Ready-made software in this area
If a product already fits, you can start there and add custom work around it.
Business API platform
A single key, one response format and one dashboard for verification APIs: PAN, GST, DigiLocker, bank accounts, vehicle RC and document OCR.
Explore Growable One
WhatsApp automation platform
Shared inbox, broadcasts, templates, keyword automation, an AI chatbot, forms, catalog and payments, with API and webhooks.
Explore UnboxChatAPI Integration: common questions
Can you build an API for our existing system?
Yes. We add a documented API layer around an existing database or application without rewriting it.
How do you handle provider downtime?
With timeouts, retries, queues and, where available, fallback providers. Growable One routes each API to a primary provider with an optional fallback.
Do you maintain integrations after launch?
Yes. Providers change their APIs, so we offer monitoring and maintenance.
Have a project, or a process that needs fixing?
Tell us about it. We reply within one working day, usually with questions rather than a sales pitch.
- Reply in one working dayA real person, not a script
- Written scope and estimateBefore you commit to anything
- Built in stagesA demo every few weeks
HP LogisticsLogistics
BrokrifyOur product
PGVerseReal estate
CubinusReal estate
Madhava's TravelsTravel and mobility
Aarogya DwarWellness
DoggyDoPet services
Party JunctionEvents
Saviour CosmeticE-commerce
Vrinda Youth CareEducation and NGO