REST and GraphQL APIs
Designed around what the consumers actually need, versioned from day one, and shipped with an OpenAPI or GraphQL schema generated from the code so the docs cannot drift.
API Development · Kolkata, India
API Development & Systems Integration
The connective tissue between your systems: documented REST and GraphQL APIs, payment and logistics integrations, and event-driven services that stay up.
Systems That Talk to Each Other
Most integration work fails in the same three places: the documentation is out of date, nothing tells you when a call started failing, and a change breaks a consumer nobody knew existed. We treat those as build requirements rather than afterthoughts — the specification is generated from the code, every endpoint is versioned from day one, and failure is monitored and alerted before a customer reports it.
In practice that covers payment gateways, logistics and marketplace sync, government and banking portals, ERP and CRM connections, and the internal services that hold a growing product together. Where volume or reliability demands it, we move work onto queues and events, so a slow third party degrades one feature instead of taking down the checkout.
- REST & GraphQL APIs, documented end-to-end
- Payment gateways, ERPs & marketplace sync
- Event-driven microservices that scale
- Monitoring, versioning & security baked in
What You Get
Included in every API engagement
Third-party integrations
Payment gateways, logistics providers, marketplaces, ERPs and government portals — including the retry, reconciliation and idempotency work that makes them survivable.
Event-driven services
Queues, workers and events so long or unreliable operations run out of band, and one slow dependency does not take the rest of the product with it.
Monitoring and security
Authentication, rate limiting and audit logging built in, plus dashboards and alerts on latency and error rate — so you hear about a break from us, not from a customer.
Who this is for
- Products whose integrations break quietly and are found by customers
- Businesses connecting an ERP, a storefront and a payment gateway
- Teams that need to expose an API to partners or a mobile app
- Monoliths where one slow third-party call takes everything down
What we build it with
- Node.js
- TypeScript
- Python
- FastAPI
- GraphQL
- PostgreSQL
- Redis
- Docker
Chosen per project — we pick the boring, production-proven option unless there is a reason not to.
How It Runs
From first call to handover
- Week 1
Integration audit and contract design: what talks to what, what the failure modes are, and a fixed itemised quote.
- Weeks 2–5
Implementation against the agreed contract, with a sandbox your team can call from day one and weekly demos.
- Week 6
Load and failure testing, monitoring and alerting, documentation, and handover of code, keys and runbooks.
Scope It Yourself
A first API roadmap, in about 40 seconds
Roadmap generator
Two questions. No email required to see it.What It Costs
Three ways in, priced in the open.
These bands say roughly where a conversation lands before you have it.
Pilot
₹75k–₹1.5 L
~2 weeks
One painful workflow, automated or rebuilt, fixed price. You keep everything we build and judge us on something low-risk.
- One workflow, end to end
- Fixed price agreed upfront
- All code and credentials yours
Build
₹1.5 L–₹8 L
4–10 weeks
A complete system — a CRM, a website, an automation layer or an API — scoped, built and handed over with training.
- Weekly demos from week one
- Milestone payments
- Free stabilisation period
Platform
₹8 L+
3–6 months, phased
ERP-scale work rolled out department by department, with a care plan that keeps it monitored and improving after launch.
- Phased rollout, phased payment
- Role-based access & audit trails
- Monthly care plan available
Indicative ranges, not quotes — your fixed itemised quote is prepared free after the discovery call, and milestone payments mean you never pay a large lump sum upfront.
The Revora Guarantee
Four commitments, in writing.
Not achievements we claim — terms we work under. Every one of these appears in your quote.
100%Code ownership handed over
Full source, documentation, credentials and deployment access are yours at launch. Any team can take over.
24hMaximum response time
Every message answered within one working day, by a founder — not a ticket queue.
7 daysTo your first demo
Working software on a screen within the first week, then a demo every week after.
0Lock-in contracts
Milestone payments, no retainer traps, no ransom on your own data. Leaving must always be easy — that’s how we intend to keep you.
Abhinav RathiAbhishek Rathi
Co-founders, Revora Consultancy · KolkataPrepared for Every clientRef REV-G-01In force
Questions
API questions, straight answers
Yes. A lot of our API work starts as an audit of something already running — we document what exists, find the failure modes, and improve it incrementally rather than proposing a rewrite you do not need.
Card data never touches our code: we integrate with the gateway’s hosted flows and tokenisation. Every payment operation is idempotent and reconciled against the gateway, so a timeout or a double-click cannot double-charge a customer or silently lose an order.
Generated from the code as part of the build, so it cannot go stale, and published where your team and your partners can reach it. Handover includes runbooks for the operational parts.
A single integration — one gateway, one ERP connection — is usually a fixed-price pilot in the ₹75k–₹1.5 L band. A documented API layer across several systems typically runs ₹1–3 L for a small team, scaling with the number of systems and the reliability work they need. Fixed itemised quote after the free discovery call.
Yes. There is a free stabilisation period after launch, and monthly care plans covering monitoring, incident response, dependency updates and small changes with clear SLAs. You own everything either way.
Ready to put technology to work for your business?
Book a free discovery call. No sales pitch — just an honest technical conversation about your goals.
Book a Free Discovery Call (opens in new tab)You’ll be talking to the founders themselves — an engineer and an ISB-trained product manager, accountable by name.
Every call ends with a written summary of what we’d build and roughly what it would cost — yours to keep, whoever you build with.
Often paired with
Get In Touch
Tell Us What’s Slowing You Down
Tell us about your project — a quick call is free, and so is the written plan that follows it. We reply within 24 hours.