Staff copy data between systems
Orders from the website are re-entered into the billing system, payments are matched by hand, and customer details are typed into the CRM again.
SERVICES / BUSINESS SYSTEMS & DATA
API Integration Services That Connect Your Business Systems
RDS Innovations connects business systems so they share data automatically and correctly. Whether you need a payment gateway on your website, orders flowing from a marketplace into your inventory, or invoices syncing to your accounting software, we build integrations that handle failures, keep a log and let you reconcile what happened.
- Integration design document
- Payment gateway integration
- Accounting and ERP sync
- Messaging integrations
IN PLAIN LANGUAGE
API Integration, explained simply.
An API (application programming interface) is the agreed way one piece of software asks another for data or tells it to do something. A webhook is the reverse: a system calls your software automatically when something happens, such as a payment succeeding. Most modern business tools offer one or both, which means they can be connected without anyone copying data by hand.
Connecting systems sounds simple, but the details decide whether an integration can be trusted. Fields have different names and formats in each system, so data has to be mapped carefully. Networks fail, so requests need safe retries. The same webhook can arrive twice, so the integration must recognize duplicates and not create two invoices. This property, called idempotency, matters a lot wherever money or stock is involved.
We also build for visibility. Every message in and out is logged with its status, failures appear in an error list with a clear reason, and reconciliation reports compare records across systems, for example payments received in the gateway versus payments recorded in your accounts. In many cases we can integrate your existing software as it is, without replacing it, as long as it offers an API, webhooks or a dependable import and export method.
PROBLEMS IT SOLVES
Why businesses invest in it.
Payments that do not match records
The payment gateway shows a successful payment, but the order is still marked unpaid, or a refund was issued without the system knowing.
Marketplace orders and stock out of sync
Products sell on more than one marketplace and your own store, and stock is updated manually, which leads to overselling and cancellations.
Fragile integrations nobody understands
A previous developer connected two systems with a script. It fails occasionally, nobody is alerted, and problems are found only when a customer complains.
Messages sent from too many places
Order confirmations, OTPs and reminders are sent from different tools with different wording, and there is no single record of what was sent.
IS IT RIGHT FOR YOU?
Who needs it, and when.
Who it is for
- Businesses using several tools that each hold part of the customer or order picture
- Online sellers handling payments, shipping and marketplace orders
- Software products that need to connect with their customers' systems
- Companies that want to keep existing software but stop manual data transfer
When it is the right time
- The same information is entered into two or more systems
- Payment, order or stock mismatches are causing customer problems or finance work
- You are launching a feature that depends on a third-party service, such as payments or messaging
- An existing integration is unreliable and you cannot see why it fails
WHAT'S INCLUDED
Features, deliverables and capabilities.
Scope is agreed in writing for every project. These are the building blocks we typically plan with you.
Integration design document
Which systems connect, what triggers each sync, which fields map to which, who owns each record, and how errors and duplicates are handled.
Payment gateway integration
Checkout, payment links or subscriptions through gateways such as Razorpay or Stripe, with webhook verification, refund handling and status updates on orders.
Accounting and ERP sync
Invoices, customers, payments and credit notes pushed to accounting software such as Tally or Zoho Books, using the method each product supports.
Messaging integrations
WhatsApp Business API, SMS/OTP and transactional email connected through providers, with templates, delivery status tracking and opt-out handling.
Marketplace and CRM connectors
Order import, stock updates and status sync with marketplaces, and lead or contact sync with CRM systems that provide APIs.
Reliability safeguards
Retries with delays, duplicate detection (idempotency), queues for high volumes, timeouts and alerts when something keeps failing.
Logs, error list and reconciliation
A searchable log of every request, a screen for failed items with a retry option, and reports that compare records across systems.
USE CASES
How businesses use it.
Representative examples of the work, described generically. They are not client case studies.
Website orders into billing
Paid orders from an online store create invoices in the accounting system automatically, with tax details and customer records matched.
Payment status updates
Gateway webhooks mark orders as paid, failed or refunded in real time, and a daily report flags any payment without a matching order.
Multi-channel stock sync
Stock changes in the central inventory are pushed to the online store and marketplaces, and incoming marketplace orders reduce stock immediately.
Lead forms into CRM with WhatsApp follow-up
Website and ad form leads are created in the CRM, assigned to a salesperson, and receive an approved WhatsApp template message confirming the enquiry.
Calendar and email for bookings
Appointments booked in an app create Google Calendar events for staff and send confirmation emails, with changes kept in sync both ways.
DELIVERY PROCESS
How we deliver it.
Decisions stay visible, important workflows are validated early, and delivery is shaped around the agreed scope.
- 01
List systems and data flows
Identify every system involved, the data each holds, which one is the source of truth, and how data should move between them.
- 02
Check what each system allows
Review API documentation, authentication, rate limits, webhook support and sandbox access, and confirm accounts and keys with you.
- 03
Map fields and rules
Match fields across systems, define conversions such as tax codes or units, and agree what happens on conflicts and missing data.
- 04
Build and test in a sandbox
Develop against test environments, simulate failures and duplicate messages, and verify reconciliation before touching live data.
- 05
Go live with monitoring
Switch on in production, watch logs closely in the first days, and hand over the error list and reconciliation reports to your team.
DECISION GUIDE
Ready connector, automation platform, or custom integration?
Not every integration needs custom code. The right approach depends on volume, how critical the data is, and how much control you need over errors.
Built-in connector or plugin
Best for: Common pairings where both products already offer an official connection.
Often the quickest and cheapest route. You are limited to the fields and behavior the connector supports, and troubleshooting depends on the vendor.
Automation platform
Best for: Low to moderate volumes of simple data transfers between popular apps.
A no-code tool can move data between apps without development. Costs grow with usage, and complex mapping, duplicate handling or reconciliation can be difficult.
Custom integration
Best for: Payments, stock, invoices and other data where accuracy and traceability matter.
Built specifically for your systems with full control over mapping, retries, duplicate detection, logs and reconciliation. It needs development and maintenance, but gives you an integration you can inspect and trust.
Benefits, technologies and integrations
BENEFITS
- Data entered once and shared where it is needed
- Payments, orders and records that agree with each other
- Failures that are visible and recoverable instead of silent
- Keep the software you already rely on
- A clear log for checking what happened and when
- A base for later automation and reporting
TECHNOLOGIES WE USE
REST APIsWebhooksPythonDjangoNext.jsTypeScriptPostgreSQLRedisDocker
INTEGRATIONS & CUSTOMIZATION
- Payment gateways such as Razorpay or Stripe
- Accounting software such as Tally or Zoho Books
- WhatsApp Business API through approved providers
- SMS/OTP and transactional email providers
- CRM platforms that offer APIs
- Online marketplaces with seller APIs
- Google Workspace (Sheets, Calendar, Gmail, Drive)
- Shipping and logistics provider APIs
PLANNING
Considerations, cost and timeline.
Limitations & implementation considerations
- An integration can only do what each system's API allows. Some products limit access by plan, restrict request rates or offer no API at all.
- Third-party APIs change over time. Integrations need monitoring and occasional updates when a provider changes its version or rules.
- Accounts, API keys and provider fees for payment gateways, messaging and other services are held and paid by the client.
- Clear ownership of data is essential. When two systems can edit the same record, the rules for which one wins must be agreed upfront.
What affects cost
- Number of systems and data flows to connect
- Quality of each system's API documentation and sandbox access
- Volume of transactions and need for queues
- Complexity of field mapping and business rules
- Reconciliation and reporting requirements
Typical timeline
A single integration with a well-documented API, such as a payment gateway, typically takes one to a few weeks depending on scope. Multi-system integrations with reconciliation are usually delivered in stages over several weeks or more.
INDUSTRY APPLICATIONS
Where it is commonly used.
FAQ
Questions about integrations.
Can you integrate our existing software without replacing it?
Often yes. If your software offers an API, webhooks or a dependable import and export format, we can build a connector around it. If it offers none of these, we will tell you what is realistic before any work starts.
What happens if a payment webhook arrives twice?
The integration checks a unique identifier for each event and ignores duplicates, so an order is not marked paid twice and an invoice is not created twice. This is standard in the payment integrations we build.
Can you connect with Tally?
Tally can usually be connected, but the method depends on your Tally version and setup. Options include its built-in integration interface and structured imports. We review your setup first and confirm the approach.
Who pays for the WhatsApp or SMS provider?
Provider accounts and usage charges are held and paid by your business, which also keeps you in control of the account. We help with setup and connect it to your systems.
How will we know if an integration stops working?
Repeated failures trigger alerts to a named person, failed items appear in an error list with the reason, and reconciliation reports highlight mismatches. You do not have to wait for a customer to report a problem.
LEARN MORE
Guides and articles.
NEXT STEP
Let's discuss your integrations project.
Tell us what you are trying to build, fix or improve. We will reply with questions, a suggested approach and a realistic estimate.