API and System Integration Services

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WavX connects stores, CRMs, accounting, payments, shipping, WhatsApp and AI models so data moves without re-typing. What is built, how, and when a plugin is enough.

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WavX Solutions
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+919310079927

Description

Service API and system integration services

An integration makes two systems share data without anyone copying it across: a paid order becomes a Tally voucher, a WhatsApp enquiry becomes a CRM lead, a shipment status reaches the customer. WavX configures the vendor's own connector where it fits, builds a custom integration where it does not, and makes every integration verifiable, retry-safe and logged.

Discuss an integration Last updated 2 October 2026

What an integration is for

Most businesses run five or six systems that were never designed to talk to each other: a store, a payment gateway, a courier account, an accounting package, a CRM, and WhatsApp on someone's phone. The gaps between them are filled by people. Orders are exported to a spreadsheet and keyed into Tally. Leads from the website are forwarded by email and typed into Zoho. Tracking numbers are pasted back into the store one at a time.

An integration replaces that copying with code. It reads a change in one system and writes the matching change in the other, with a record of what it did. The return is fewer typing errors, faster follow-up, and numbers that agree between systems at the end of the month.

If you want other businesses or apps to connect to your software, that is a different job: you need an API of your own. See custom API development .

The three ways to connect two systems

Pick the cheapest route that will hold up for your volume and your rules.

Route

Suits

Where it stops

The vendor's own plugin or app

A standard store or CMS connected to a popular service

Only does what its settings allow; you cannot change how it maps data

A no-code connector (Zapier, Make, n8n)

Low volume, simple rules, popular apps on both sides

Usage-based pricing grows with volume; failures are easy to miss; weak at reconciliation

A custom integration

Business-specific rules, high volume, or a system with no ready connector

Needs maintenance when either side changes its API

WavX does all three kinds of work. Setting up a vendor's connector properly is a small job: the right sync direction, matching product codes, mapping tax rates, and a test with real orders. Where the connector cannot do what the business needs, WavX builds the integration as a small service that you own. For the trade-offs between no-code tools and custom code, read Zapier vs n8n vs custom automation.

Systems WavX connects

The table lists the systems named across WavX's service pages and the guide for each on this site. It describes what WavX offers; it is not a record of past projects. WavX has not published an integration case study, so none is claimed here.

Category

Systems

Usual route

Guide

Accounting

Tally (TallyPrime)

Custom: XML (or JSON, from TallyPrime 7.0) over HTTP to the machine running Tally, or a third-party connector

Tally , Shopify to Tally

Tax

GST e-invoicing

Custom, through a GSP or the IRP's API

CRM

Zoho CRM, HubSpot

Vendor extension first; custom for your own fields, scoring or two-way sync

Zoho CRM , HubSpot

Payments

Razorpay, Stripe, UPI AutoPay

Gateway's SDK and hosted checkout, plus server-side verification

Razorpay , Stripe , UPI AutoPay

Shipping

Shiprocket

Channel integration for Shopify and WooCommerce; custom for other stores and NDR handling

Shiprocket , Shopify and Shiprocket

Messaging

WhatsApp Business API

Meta's Cloud API, directly or through a provider

WhatsApp Business API , WhatsApp to CRM

Store platform

Shopify

A custom app on the Admin API and webhooks

Shopify Admin API

AI models

OpenAI, Anthropic Claude

A backend service that calls the model API

OpenAI API , Claude API

Analytics and ads

Google Analytics 4, Meta Conversions API

Tag setup plus server-side events

GA4 , Meta Conversions API

Maps

Google Maps Platform

Client and server API keys with restrictions

Systems not listed are not ruled out. Any system with a documented API, or a reliable export, can be connected. The first question is always what the system's own documentation allows.

What every integration WavX builds includes

The difference between an integration that works in a demo and one the accounts team can rely on is in four things. They apply whichever two systems are being joined.

Verified input. Incoming webhooks are checked against the sender's signature or shared secret before anything is written. A message that fails the check is logged and refused.

Duplicates do no harm. Vendors resend messages when they do not get a prompt reply, so the same order can arrive twice. Every record carries the source system's ID, and the integration checks for it before creating anything.

A scheduled check for what was missed. Webhooks can be lost. A job runs on a schedule, compares the two systems for the last day or week, and fixes or reports any difference.

Errors a person can read. "Product SKU TSHIRT-BLU-M has no matching stock item" on a screen your team can open, with a retry button, instead of a line in a server log.

Alongside those: a mapping screen so new products, tax rates or lead sources can be matched without a developer; API keys stored as secrets, not in the code; and a log of every exchange kept long enough to answer "did this order go across, and when?"

How an integration project runs

1. Map the data before writing code

The work starts with one real record from each side: an order and the voucher it should become, or an enquiry and the lead it should become. Each field is matched, and every case that does not match is written down: discounts, partial refunds, bundles, interstate tax, a lead with no email. Most integration problems are mapping problems, and they are cheaper to find on paper.

The project brief template has room for this. Two sample records, the list of systems and the volume per day are the most useful things to bring to a first call.

2. Confirm access and limits

Each system's API is checked for what it allows on your plan: rate limits, which objects can be written, how authentication works, whether there is a test environment. Some limits only appear on the vendor's pricing page, and some features need a higher plan. This is when the honest answer may be "the connector you already pay for can do this".

3. Build against test data

Where a vendor offers a sandbox or test mode, the integration is built there. Where it does not, testing is done with real records that are cancelled or deleted afterwards, agreed with you in advance.

4. Run in parallel

For accounting and stock, the integration runs alongside the manual process for an agreed period, and the results are compared. It takes over only when the two agree.

5. Hand over

You receive the code, the hosting account, a short document describing each data flow, and the list of vendor API versions the integration depends on. The document names who to call when a vendor announces a change, and which screen shows a failed record, so the integration does not depend on one developer's memory.

What it costs

A standalone integration is quoted after scoping. The cost depends on the number of data flows, whether they run in one direction or both, and how many exceptions the mapping has.

For planning, the software cost estimator carries third-party integrations as a ₹60,000 line item inside a larger build. A worked example from the same cost model:

Build

Line items

Subtotal

Planning range

Timeline band

Integration service with its own admin and error screen

Internal tool/dashboard base ₹2,00,000 + third-party integrations ₹60,000

₹2,60,000

₹2,21,000 to ₹3,25,000

3–6 weeks

The range is the cost model's spread of 15% below to 25% above the subtotal. It is a planning range, not a quote. Vendor fees (gateway charges, WhatsApp message charges, AI model usage, CRM seats) are paid to the vendor and are separate. Ongoing maintenance is budgeted at 15–25% of the build cost per year in WavX's published maintenance guide .

When not to hire anyone

The vendor's connector already does it. If you sell on Shopify and ship every order the same way, connecting Shiprocket in its own panel costs nothing. Configure first; build only if it falls short.

The volume is tiny. If five orders a day reach the accounts, a daily export and import by your accountant may cost less than building and maintaining an integration.

The process itself is not settled. If the sales team has not agreed what a qualified lead is, automating the hand-off will move the confusion faster. Agree the rule first.

A no-code connector covers it and failures are cheap. Sending a Slack message when a form is filled is a no-code job. Writing invoices into the books is not.

Related work

Integrations are part of most WavX builds: custom software and business systems , e-commerce development and Shopify integrations . When a sync has already broken, start with orders not syncing to Tally or your ERP .

Frequently asked questions

Do I need a custom integration, or will a plugin do?

Try the vendor's own plugin or app first. Many systems an Indian business uses, including Shiprocket, Razorpay and Zoho, publish ready connectors for common platforms. A custom integration is worth paying for when the connector cannot follow your rules, when there is no connector at all, or when failures need to be visible to your team and fixed without a developer.

Can you connect a system that has no API?

Sometimes. Tally, for example, has no hosted API but answers XML requests on the computer where it runs. Other systems can only export files, or can be read from their database with the vendor's permission. We check which route the system supports before quoting, and say so if the only route is fragile.

What does an integration cost?

It is quoted after scoping, because the cost depends on how many data flows there are and how messy the mapping is. As a planning figure, the software cost estimator carries third-party integrations as a ₹60,000 line item inside a larger build. A worked example on this page gives a planning range for a small integration service with its own admin screen.

Who owns the integration?

You do. The code is handed over, the server runs in a cloud account in your company's name, and the API keys for each system are issued to your accounts, not to ours.

What happens when one of the vendors changes its API?

Vendors retire old API versions on their own schedules, so an integration needs someone to watch for those notices and update it. That can be us under a maintenance arrangement, or your own developer working from the documentation we hand over.

Sources

TallyHelp: XML integration · read 2 October 2026

TallyHelp: How to integrate with TallyPrime using JSON · read 2 October 2026

Razorpay docs: Shopify integration · read 2 October 2026

Zoho CRM help: Shopify for Zoho CRM · read 2 October 2026

Related

Integration guides by system

Custom API development

Shopify integrations

Orders not syncing to Tally or your ERP

Software cost estimator

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Contact Now helpwavx@gmail.com

Reference material from WavX Solutions

Related questions WavX has answered

Do I need the WhatsApp Business API for my Shopify store or is the normal WhatsApp Business app enough?

The WhatsApp Business app is enough while one person answers chats by hand; you need the API once messages should send themselves. The API is what allows automatic order confirmations, shipping updates, COD confirmation, abandoned-cart reminders, several agents on one number and chatbots. It works through an approved provider, uses pre-approved message templates and requires customer opt-in. For an Indian store where many buyers prefer WhatsApp to email, order updates over the API are usually the first automation worth adding. Source

I run a D2C snacks brand in India and want a refer-and-earn feature. A customer should share a link on WhatsApp, their friend installs the app, and both get wallet credit automatically without typing a code. How is that built?

This is built with deferred deep linking: the referral link carries the referrer's ID, survives the trip through the Play Store or App Store, and is read by the app on first launch. The customer taps share, WhatsApp opens with a prefilled message and link, and when the friend installs and signs up, the backend matches the ID and credits both wallets after a qualifying order. Add fraud rules such as one reward per device and phone number. WavX builds referral and wallet systems alongside its mobile apps. Source

We use HubSpot for B2B sales and Shopify for our online store, and the two don't share customer data. Marketing wants abandoned carts and order history inside HubSpot. Is the ready-made connector enough, or should we build a custom integration?

Start with the ready-made connector; it covers what marketing asked for. Standard connectors sync customers, orders, products and abandoned carts into HubSpot and are quick to switch on. Build a custom integration only when you hit their limits: mapping Shopify B2B companies to HubSpot companies, syncing metafields, custom deal stages per order, two-way updates, or strict rules for merging duplicate contacts. Run the connector for a month, list what is missing, and scope custom work from that list. HubSpot is among the integrations WavX names. Source

I work in IT at a facilities management company in Doha. Our old on-premise maintenance system stores everything in Arabic and has no API, and management wants a modern dashboard and mobile app on top of it without switching it off. What approach would you take?

Leave the old system running and build a reporting layer beside it. A scheduled job copies the maintenance data from its database into a cloud database, taking care to preserve the Arabic text encoding, and the new dashboard and mobile app read from that copy. If technicians must update jobs from the app, writes go back through whatever import route the old system accepts, tested heavily. Over time, new modules can take over functions one by one. WavX's working day runs 7:30 AM–4:30 PM Qatar time. Source

Our company in Coimbatore runs on a 15-year-old desktop ERP built in FoxPro by a local developer who has retired. There is no documentation, only the database and the screens, and it holds both pre-GST and GST-era invoices. How would a new team move us to a modern system without losing anything?

Treat the old database as the specification. The new team first reads its tables and reports to map what is stored, then sits with users to confirm which screens and rules are still used, since fifteen years leave many dead features. Data is extracted by script, loaded in trial runs and reconciled against old reports until totals match. Pre-GST invoices have a different tax structure, so keep them as read-only history instead of forcing them into the new format, and run both systems for one closing cycle. Source

Whatsapp business api crm integration india?

A custom CRM connects to WhatsApp through the official WhatsApp Business API, not through a personal number or an unofficial tool. Incoming messages attach to the right lead, salespeople reply from inside the CRM, and approved templates send quotations, payment reminders or follow-ups automatically. Message charges from Meta are billed separately from the software, and templates need its approval. For Indian businesses whose buyers enquire on WhatsApp first, this keeps every chat on company record instead of in an employee's phone. Source

Connect online store to zoho books or accounting software?

An online store connects to accounting software such as Zoho Books or Tally through the accounting tool's API or an import format. Each paid order creates a sales invoice with the customer, items, tax breakup and payment reference; refunds create credit notes; gateway settlements are posted with fees separated. The mapping of products to ledger accounts and tax codes is set up once. Done properly, the accountant reconciles from the accounting tool alone and nobody re-types orders. WavX names Tally and Zoho among its integrations. Source

How do you connect new software to an old system that has no API?

There are three workable routes when an old system has no API. Read its database directly, ideally through a read-only copy, and write back only through channels the old system already accepts. Exchange files: most old systems can export and import CSV or XML on a schedule. As a last resort, automate the screens with a script that types and clicks like a user, which works but breaks when the screen changes. A small connector service usually sits between the two systems to translate and log. Source

WavX starting prices (base scope, before add-on features)

From the cost model behind the WavX calculators. A quote follows a scoping call; features, integrations and scale move these figures. Annual maintenance is typically 15–25% of the build cost.

BuildStarting priceTypical timeline
Landing pagefrom ₹40,0003–6 weeks
Business websitefrom ₹50,0003–6 weeks
E-commerce storefrom ₹1,50,0003–6 weeks
Internal tool / dashboardfrom ₹2,00,0003–6 weeks
Custom web applicationfrom ₹4,50,0006–10 weeks
SaaS productfrom ₹7,00,00010–16 weeks
ERP / CRM systemfrom ₹9,00,00010–16 weeks
AI chatbotfrom ₹1,50,0003–6 weeks
RAG assistant (your data)from ₹3,50,0006–10 weeks
AI agent / automationfrom ₹5,00,0006–10 weeks
AI feature in an appfrom ₹2,50,0003–6 weeks

Calculators: website, software, AI, mobile app. Pricing explained: https://www.wavxsolutions.in/pricing.

About WavX Solutions

WavX Solutions (WAVX — Web Application & Venture Exchange) is a remote-first, 100% custom software development company founded in 2022 in Gurgaon, Delhi NCR, India. WAVX designs, builds, scales and maintains custom websites, web applications, iOS and Android apps, Shopify stores, ERP/CRM software, loyalty systems, AI integrations and performance marketing for startups, businesses, brands and institutions across India.