Do you have different software systems that don't communicate with each other?
Perhaps your website has one set of information, your POS has another, your accounting software is separate, and your mobile application doesn't know what's happening in your main system.
This creates unnecessary work.
Employees may have to:
Enter the same information multiple times
Download and upload spreadsheets
Copy customer details between systems
Reconcile payments manually
Update inventory in different systems
Move data from one application to another
This is where API development and system integration can make a significant difference.
At WATT-IF LTD, we develop APIs and integrations that can help businesses connect their websites, mobile applications, POS systems, ERP systems, CRM platforms, databases, payment services and other software.
🔗 Do Your Business Systems Need to Talk to Each Other?
WATT-IF can analyze your existing systems and develop the APIs or integrations required to connect them.
[Request an API & Integration Consultation]
API stands for Application Programming Interface.
An API allows different software applications to communicate with each other in a controlled way.
Think of an API as a messenger between software systems.
For example:
Website
↓
API
↓
Business Database
The website can request information from the database through the application backend/API.
Another example:
POS
↓
API
↓
Inventory System
When a product is sold, the POS can send information to the inventory system.
The inventory system can then update the stock level.
Imagine you own an electronics shop.
Your business has:
Website
POS
Inventory system
M-Pesa payments
Accounting software
Without integration, you might have to enter information into each system.
A connected architecture can look like:
Website
↘
POS → Central System → Inventory
↗
Mobile App
↓
Payment Integration
↓
Accounting
The objective is to allow the systems to exchange the appropriate information automatically.
Businesses increasingly use multiple digital tools.
You might have:
Accounting software
CRM
POS
Website
Mobile app
Payment gateway
Inventory software
ERP
HR software
The problem is that these systems don't always naturally communicate.
API integration creates a bridge between them.
Suppose your sales team enters a new customer into your CRM.
Without integration, someone may need to manually enter that customer into another system.
With appropriate integration:
CRM
↓
API
↓
Customer database
The information can be transferred automatically.
Payment processing is another common integration requirement.
For example:
Customer
↓
Website
↓
Payment Gateway
↓
Payment Confirmation
↓
Order System
↓
Database
The payment confirmation can trigger the appropriate order status.
Imagine you have:
Physical shop
Website
Mobile application
All three sell the same products.
If inventory isn't synchronized, you could accidentally sell a product online after it has already been sold in the shop.
An integrated system can potentially work like:
POS sale
↓
Central inventory
↓
Website stock updated
↓
Mobile app stock updated
Your CRM can store:
Customer name
Phone number
Purchase history
Your website may also need customer information.
API integration can allow systems to exchange appropriate customer data without requiring employees to repeatedly enter it.
The exact possibilities depend on whether the systems provide appropriate integration mechanisms.
Potential integrations include:
Websites
Mobile applications
POS systems
ERP systems
CRM systems
Inventory systems
Accounting systems
Invoicing systems
Databases
Payment gateways
M-Pesa services
SMS platforms
Email platforms
E-commerce platforms
HR systems
School systems
Hospital systems
These terms are related but not exactly the same.
This means creating an API for your own software.
For example:
WATT-IF develops a business management system.
We then create APIs that allow:
Mobile applications
Websites
POS terminals
Third-party software
to communicate with the system.
This means connecting your software to an API that already exists.
For example:
Your website
↓
Payment provider API
↓
Payment service
Your website uses the provider's existing API.
Our process begins by understanding what you want the systems to accomplish.
We identify:
What software you use
Where your data is stored
Which systems need to communicate
What information needs to move
How frequently it needs to move
Who needs access
What triggers the communication
For example:
"When a customer pays through our website, we want the order to be confirmed, inventory reduced and the customer to receive a confirmation."
That gives us a business workflow to design around.
We determine what information needs to be transferred.
For an e-commerce order:
Customer
Name
Phone
Order
Order ID
Products
Quantity
Price
Total
Payment
Payment reference
Amount
Status
Delivery
Address
Delivery status
These data elements can then be mapped between systems.
We determine how the systems will communicate.
A simplified architecture could be:
Website
↓
Backend/API
↓
Database
Another could be:
Website
↓
Integration Layer
↓
POS API
↓
Inventory
↓
Database
The architecture depends on the project.
The API is developed according to the agreed requirements.
It may provide functions such as:
Create customer
Get customer
Update customer
Create order
Get order
Update order
Check inventory
Process payment
Get payment status
The exact API endpoints depend on the application.
APIs should not simply be exposed to anyone.
Authentication and authorization mechanisms can be implemented to control access.
Depending on the project, these can include:
API keys
Tokens
OAuth-based authentication
Role-based permissions
Signed requests
Secure HTTPS communication
The appropriate approach depends on the systems being connected.
Integration testing is critical.
We test scenarios such as:
Successful transaction
Failed transaction
Duplicate request
Invalid information
Timeout
System unavailable
Incorrect credentials
Payment failure
The objective is to ensure the connected systems behave correctly.
After testing, the integration can be deployed to the appropriate environment.
This may involve:
Production servers
Cloud infrastructure
Databases
DNS
SSL
API credentials
Integration problems aren't always obvious.
A payment API could become unavailable.
A third-party service could change its API.
A request could fail.
Therefore, monitoring and logging can help identify problems.
For Kenyan businesses, payment integration is a common requirement.
A potential workflow could be:
Customer
↓
Website/POS
↓
Payment Request
↓
M-Pesa Service
↓
Customer Payment
↓
Callback/Confirmation
↓
Business System
↓
Order Updated
The exact workflow depends on the applicable M-Pesa integration and business requirements.
💰 Want to Connect M-Pesa to Your Website or System?
WATT-IF can help assess your payment workflow and develop the required integration.
[Discuss M-Pesa Integration With WATT-IF]
Businesses accepting card payments may also need their website or application to communicate with a payment provider.
A typical process is:
Customer
↓
Checkout
↓
Payment Provider
↓
Card Payment
↓
Payment Confirmation
↓
Order System
The integration can be designed to ensure the business system receives the appropriate payment status.
Suppose you operate an online store.
Your website may need access to:
Products
Prices
Stock
Customers
Orders
Payments
An API can provide controlled access to these functions.
For example:
Website
asks:
"Is Product A available?"
↓
API
↓
Inventory
↓
Response: 25 units available
The website can then display the appropriate availability.
Mobile applications commonly use APIs to communicate with backend systems.
For example:
Mobile App
↓
API
↓
Backend
↓
Database
The mobile application can request:
User profile
Products
Orders
Notifications
Account balance
Transactions
This architecture allows the mobile application to interact with centralized business data.
A POS system can communicate with other systems through APIs.
For example:
POS
↓
API
↓
Inventory
A completed sale can update inventory.
Another example:
POS
↓
API
↓
Accounting
The transaction can be transferred to the accounting system according to the integration design.
An ERP can contain multiple modules.
For example:
Sales
Inventory
Procurement
Finance
HR
APIs can allow other applications to interact with the ERP.
For example:
Website
↓
ERP API
↓
Inventory
This can allow the website to retrieve appropriate product availability.
A CRM can be connected to websites, mobile apps and other systems.
For example:
Website enquiry
↓
API
↓
CRM
↓
New lead created
This can reduce the need for employees to manually copy enquiries from the website into the CRM.
Businesses often use separate accounting platforms.
A custom business system may need to send financial information to the accounting software.
For example:
Invoice generated
↓
API
↓
Accounting system
↓
Invoice recorded
The exact integration depends on the accounting software and available API capabilities.
APIs can also connect your business system to SMS services.
For example:
Customer places order
↓
System
↓
SMS API
↓
Customer receives SMS
Messages could include:
Order confirmations
Appointment reminders
Payment notifications
Delivery updates
Account alerts
Similarly, an application can connect to an email service.
For example:
New customer
↓
System
↓
Email service
↓
Welcome email
This can automate customer communication.
A school management system can potentially integrate with:
SMS services
Payment systems
Websites
Student portals
Mobile applications
For example:
Fee payment
↓
Payment service
↓
School system
↓
Student account updated
A hospital management system can potentially integrate:
Patient portal
Payment systems
Laboratory systems
Pharmacy
SMS
Mobile applications
The integrations should be designed carefully because healthcare data may have additional privacy and security requirements.
An HR system can connect different employee processes.
For example:
Attendance system
↓
API
↓
HR system
↓
Payroll process
This can reduce repetitive data entry.
An online business may need to connect:
Website
Inventory
Payments
Orders
Delivery
Customer notifications
APIs can provide the communication layer between these services.
A good integration should anticipate failures.
For example:
Customer makes a payment.
But the payment confirmation doesn't reach the website.
Without appropriate handling, the order could remain pending.
An integration can be designed to handle situations such as:
Retry mechanisms
Timeouts
Error logging
Duplicate transaction protection
Status checks
Manual reconciliation
This is one reason professional API development matters.
A webhook allows one system to notify another system when something happens.
For example:
Payment completed
↓
Payment provider sends webhook
↓
Your system receives notification
↓
Order marked as paid
This can be particularly useful for payment and order workflows.
Security is an important part of API development.
An API can potentially expose business information if it is poorly configured.
Security measures can include:
Authentication
Authorization
Encryption in transit
Input validation
Rate limiting
Logging
Access controls
Secure credentials
Monitoring
The appropriate security architecture depends on the sensitivity and purpose of the API.
If an API will be used by developers, documentation is important.
Documentation can explain:
Available endpoints
Required parameters
Authentication
Request formats
Response formats
Error messages
Examples
Good documentation makes future integration easier.
Before deployment, APIs can be tested for:
Correct responses
Authentication
Invalid requests
Missing parameters
Error handling
Performance
Security
Duplicate requests
Testing should cover both successful and unsuccessful scenarios.
API development costs vary considerably.
A simple API may expose a few functions.
An enterprise integration may connect:
ERP
CRM
POS
Website
Mobile app
Payment gateways
Accounting
Inventory
The second project is considerably more complex.
Connecting two systems is generally simpler than connecting six.
More functionality means more development and testing.
External services may have their own requirements and limitations.
Advanced authentication requirements add complexity.
Different systems may store information differently.
For example:
System A:
customer_phone
System B:
mobile_number
The integration needs to map the information correctly.
Real-time systems require appropriate architecture.
Reliable integrations need to account for failures.
Business-critical integrations may require monitoring and alerts.
The timeline depends on:
Number of systems
Number of endpoints
Third-party APIs
Security requirements
Data complexity
Testing
Documentation
Deployment
A simple integration may be completed much faster than a large enterprise integration.
WATT-IF can provide a more accurate timeline after assessing your systems.
Consider a business that receives 100 online orders per day.
Without integration, employees might manually:
Open the website.
Copy customer details.
Open the POS.
Enter the order.
Update inventory.
Record payment.
Send confirmation.
That's repetitive work.
With integration:
Online Order
↓
API
↓
Business System
↓
Inventory
↓
Payment
↓
Confirmation
The system can automate appropriate parts of the workflow.
We don't develop APIs in isolation.
We understand what the integration is supposed to accomplish.
You may not need to replace your entire software ecosystem.
We can assess whether your existing systems can be connected.
If your software doesn't have the required API, we can develop one where appropriate.
We can help with applicable payment integration requirements.
Your web and mobile applications can communicate with centralized business systems.
Authentication and access control are part of the integration discussion.
APIs may need maintenance when third-party platforms change.
🔗 Stop Moving Data Manually
If your employees spend hours copying information from one system to another, let's examine whether the process can be automated.
[Request an Integration Assessment]
You may benefit from API integration if:
Employees enter the same data into multiple systems.
Your website and POS have separate product records.
Your inventory doesn't update automatically after online sales.
You manually reconcile payment transactions.
Your CRM doesn't receive website leads automatically.
Your accounting system is disconnected from sales.
Your mobile app cannot access your business data.
You manually send customer notifications.
Your ERP doesn't communicate with your website.
You use several disconnected business applications.
Your business relies heavily on Excel for transferring information.
Customers wait for manually processed orders.
You frequently experience data inconsistencies.
You want to automate repetitive workflows.
You want to build a connected digital ecosystem.
An API allows different software systems to communicate.
API integration connects software systems using APIs.
Yes.
Yes, where the relevant API is available and technically accessible.
WATT-IF can help develop applicable M-Pesa payment integrations.
Yes, through supported payment providers.
Yes, typically through a backend application.
Yes, where the existing system provides or can support appropriate integration.
Yes.
Yes, subject to the accounting platform's integration capabilities.
Yes.
Yes, where the systems support suitable integration.
Yes, where the payment provider supports the necessary mechanisms.
A webhook is a mechanism through which one system sends an event notification to another system.
They can be secured through appropriate authentication, authorization, encryption and other security controls.
It depends on the number of systems, functionality, security, integrations and complexity.
The timeline depends on the scope of the integration.
Yes.
Yes. Ongoing maintenance can be arranged.
Yes. A properly designed integration architecture can connect multiple systems.
Imagine this:
A customer visits your website.
They place an order.
↓
The order enters your system.
↓
Payment is confirmed.
↓
Inventory is updated.
↓
The order appears in your operations dashboard.
↓
The accounting record is created or prepared for synchronization.
↓
The customer receives confirmation.
That is the value of integration.
Instead of employees constantly moving information between systems, software can handle appropriate parts of the workflow.
WATT-IF LTD provides software development, API development and integration solutions for businesses that want their technology to work together.
We can help with:
API development
API integration
Website integrations
Mobile application integrations
POS integrations
ERP integrations
CRM integrations
Inventory integrations
Accounting integrations
M-Pesa integrations
Payment gateway integrations
SMS integrations
Email integrations
Database integrations
E-commerce integrations
Custom business integrations
Explore WATT-IF software development services
🚀 Connect Your Business Systems
You don't need to understand APIs to get started.
Tell WATT-IF:
Which systems you currently use
Which systems you want to connect
What information needs to move between them
What processes are currently manual
What you want to automate
We'll help assess the integration requirements and recommend a suitable approach.
[Request an API Consultation]
[Request a Custom Integration Quote]
[Talk to WATT-IF]