How to Integrate Your Business Tools via API

Introduction

You probably use around ten digital tools to run your business: a CRM, accounting software, email, an invoicing tool, a website, a project management tool… But do these tools talk to each other? In most Belgian SMEs, the answer is no, which leads to duplicate data entry, errors and considerable wasted time.

In 2026, according to a Digital Wallonia study, Belgian SMEs lose an average of 5 to 8 hours a week manually transferring data between their tools. At EUR 40 an hour (the average fully loaded cost of an employee in Belgium), that represents a loss of EUR 10,400 to 16,640 a year per employee affected.

The solution is API integration, made possible by APIs (Application Programming Interfaces). And the good news is that, in 2026, you no longer need to be a developer to connect your tools, thanks to no-code platforms such as Zapier, Make or Power Automate.

This guide explains, in simple terms, what APIs are, how to use them to connect your business tools, and gives you concrete examples suited to the Belgian context.

What is an API? A simple explanation

The restaurant analogy

Imagine you're in a restaurant. You (the customer) want to order a dish. The chef (the data server) can prepare your dish, but you can't go straight into the kitchen. The waiter (the API) acts as the go-between: they take your order, pass it to the chef, and bring your dish back to you.

An API works in exactly the same way: it lets two pieces of software communicate with each other according to defined rules, without you needing to understand how each one works internally. This is the basic mechanism behind every API integration described below.

A concrete example for a Belgian SME

Your website (WordPress) receives an order from a customer. Without an API, you have to manually:

1. Copy the customer's details into your CRM (Teamleader)
2. Create an invoice in your accounting software (Yuki)
3. Send a confirmation email to the customer
4. Update your stock in your Excel spreadsheet

With connected APIs, all of this happens automatically within seconds, with no human intervention.

API integration without coding (no-code)

Zapier: the market leader

Zapier is the world's most popular integration platform, with more than 6,000 connected apps.

How it works:

• A "Zap" is an automation made up of a trigger and one or more actions
• Example: "When a form is submitted on my website (trigger), create a contact in Teamleader (action 1) and send a welcome email (action 2)"

Zapier pricing (2026):

Belgian apps available on Zapier:

• Teamleader, Odoo, Exact Online, Yuki
• Mollie (payments), Sendcloud (delivery)
• Sortly, StoreKeep
• All the major international apps (Gmail, Outlook, Slack, etc.)

Make (formerly Integromat): more powerful, more visual

Make is a European alternative to Zapier, often preferred for complex automations thanks to its visual drag-and-drop interface.

Advantages over Zapier:

• A more intuitive visual interface for complex workflows
• More operations per scenario (more cost-effective for high volumes)
• More advanced error handling
• Servers in the EU (easier GDPR compliance)

Make pricing (2026):

Microsoft Power Automate: ideal for the Microsoft ecosystem

If your company uses Microsoft 365, Power Automate is often the best choice, as it is partly included in your subscription.

Advantages:

• Included in Microsoft 365 Business (basic flows)
• Native integration with Teams, SharePoint, Outlook, Excel, Dynamics 365
• Connectors for hundreds of third-party applications
• Power Automate Desktop for automating desktop applications (RPA)

Power Automate pricing (outside M365):

• Power Automate Premium: EUR 15/user/month
• Power Automate Process: EUR 150/bot/month (for flows without human intervention)

Comparing integration platforms

10 essential integrations for a Belgian SME

Here are ten scenarios where API integration saves the most time for a Belgian SME.

1. Website to CRM

Scenario: A visitor fills in a contact form on your WordPress site.

Automation:

• Trigger: New form submitted (WPForms, Contact Form 7, Gravity Forms)
• Action 1: Create a contact/lead in Teamleader or HubSpot
• Action 2: Send a Slack/Teams notification to the sales rep
• Action 3: Send an automatic confirmation email to the prospect

Benefit: 3-5 hours/week saved, zero leads lost.

2. CRM to invoicing/accounting

Scenario: A quote is accepted in Teamleader.

Automation:

• Trigger: Quote marked as "accepted" in Teamleader
• Action 1: Create an invoice in Yuki or Exact Online
• Action 2: Send the invoice to the customer by email (Peppol format if B2B)
• Action 3: Create a project in the project management tool

Benefit: 2-4 hours/week saved, invoicing sped up by 3-5 days.

3. E-commerce to logistics and accounting

Scenario: An order is placed on your online shop (WooCommerce or Shopify).

Automation:

• Trigger: New order
• Action 1: Create a delivery note in Sendcloud (a Belgian integration for bpost, PostNL, DPD, DHL)
• Action 2: Record the sale in your accounts (Yuki, Exact Online)
• Action 3: Update stock
• Action 4: Send a confirmation email with delivery tracking

Benefit: 5-10 hours/week saved for an e-commerce business with 50+ orders/day.

4. Bank to accounting

Scenario: Automatic reconciliation of bank transactions.

Belgian tools:

• Ponto (Isabel Group, Belgian): an open banking API that lets you connect your Belgian bank accounts (BNP Paribas Fortis, KBC, Belfius, ING, etc.) to your accounting software
• Yuki and Exact Online have native banking integrations via Ponto/Isabel
• Odoo (Belgian) also integrates Ponto for automated bank reconciliation

Benefit: 4-8 hours/week saved, real-time bank reconciliation.

5. Email to CRM (automatic enrichment)

Scenario: An email from a new contact lands in your inbox.

Automation:

• Trigger: New email from an unknown sender (Outlook/Gmail)
• Action 1: Check whether the contact already exists in the CRM
• Action 2: If not, create a new contact with the extracted information
• Action 3: Attach the email to the customer's record in the CRM

6. Calendar and appointments

Scenario: A customer books an appointment online.

Automation with Calendly or Microsoft Bookings:

• Trigger: New appointment scheduled
• Action 1: Create an event in Google Calendar / Outlook
• Action 2: Send a reminder SMS the day before (via MessageBird or Twilio)
• Action 3: Add a note in the CRM
• Action 4: Send a preparation form to the customer

7. Social media to CRM

Scenario: A prospect interacts with your LinkedIn or Facebook page.

Automation:

• Trigger: New lead from a Facebook Lead Ad or LinkedIn Lead Gen
• Action 1: Create a contact in the CRM
• Action 2: Send a welcome email
• Action 3: Assign the lead to a sales rep

8. Invoicing and payment reminders

Scenario: An invoice is not paid by its due date.

Automation:

• Trigger: Invoice unpaid 7 days after due date (Teamleader, Exact Online)
• Action 1: Send a polite email reminder
• Action 2: At day 14, send a firmer second reminder
• Action 3: At day 30, notify the manager for manual follow-up
• Action 4: Log every reminder in the CRM

Benefit: The average payment delay drops by 15-20 days. In Belgium, the average B2B payment term is 40 days; this automation can bring it down to 25 days.

9. HR and onboarding

Scenario: A new employee joins the company.

Automation:

• Trigger: New employee added in the HR system (Officient, Personio)
• Action 1: Create a Microsoft 365 / Google Workspace account
• Action 2: Send a welcome email with practical information
• Action 3: Add them to the relevant Teams/Slack groups
• Action 4: Schedule training sessions in the calendar
• Action 5: Order IT equipment

10. Customer support to knowledge base

Scenario: Repetitive customer questions automatically feed your FAQ.

Automation:

• Trigger: Support ticket closed with the "FAQ" tag (Zendesk, Freshdesk, Crisp)
• Action 1: Create a draft article in the knowledge base
• Action 2: Notify the content team for review and publication

Open Banking in Belgium: banking APIs

Belgium is at the forefront of Open Banking, thanks to the European PSD2 directive and the Isabel Group ecosystem. It is a specialised form of API integration built specifically for financial data:

Isabel Connect / Ponto

Ponto (now integrated into Isabel Connect) is the go-to Belgian Open Banking solution:

• Connection to all Belgian banks: BNP Paribas Fortis, KBC, Belfius, ING, CBC, Argenta, AXA Bank, Crelan, etc.
• REST API: access to accounts, transactions, and payment initiation
• PSD2 compliance: fully compliant with European regulations
• Price: from EUR 4/month per bank connection
• Integration: native connectors with Odoo, Exact Online, Yuki, Teamleader

Concrete use cases

• Automatic bank reconciliation in your accounts
• Real-time financial dashboards
• Alerts on payments received or low balances
• Automatic payment initiation (supplier transfers)

Security and GDPR in API integrations

Points to watch

When you connect your tools via API, data (potentially personal data) passes between platforms. Here are the best practices:

1. Check the platforms' GDPR compliance:

• Where is the data stored? (Prefer the EU)
• Is a DPA (Data Processing Agreement) available?
• Exactly what data is transferred?

2. Apply the minimisation principle:

• Only transfer the data that is strictly necessary
• If only the name and email are needed in the CRM, don't transfer the address and phone number

3. Secure your connections:

• Use API keys with limited permissions (read-only where possible)
• Enable MFA on all your accounts (Zapier, Make, CRM, etc.)
• Revoke access for employees who leave the company

4. Document your workflows:

• Keep an inventory of all your integrations
• Update your GDPR record of processing activities
• Document which data flows between which tools

Step-by-step guide: create your first integration

Example: connecting a WordPress form to Teamleader via Zapier

Prerequisites:

• A Zapier account (free to get started)
• A WordPress site with WPForms or Contact Form 7
• A Teamleader account

Step 1: Log in to Zapier and click "Create Zap"

Step 2: Choose the trigger

• App: WPForms (or Gravity Forms, etc.)
• Event: "New Form Entry"
• Connect your WordPress site to Zapier (via the Zapier plugin for WordPress)
• Select the contact form

Step 3: Choose the action

• App: Teamleader
• Event: "Create Contact"
• Connect your Teamleader account (via an API key)
• Map the fields: First name from the form to First name in Teamleader, etc.

Step 4: Add a second action (optional)

• App: Gmail or Outlook
• Event: "Send Email"
• Configure the confirmation email to the prospect

Step 5: Test and activate

• Submit a test form on your site
• Check that the contact is created in Teamleader
• Check that the email is sent
• Turn the Zap on

Total time: 15-30 minutes, without writing a single line of code.

Budget for API integrations

Cost by scenario

Typical ROI

For a Belgian SME with 15 employees automating 5 processes:

• Investment: EUR 50-100/month in tools + EUR 2,000 for initial setup
• Benefit: 6-10 hours/week x EUR 40/h = EUR 960-1,600/month
• ROI: 800-3,000% within the first year

Conclusion

API integrations are the secret behind Belgium's most efficient SMEs. By connecting your tools together, you eliminate duplicate data entry, reduce errors, speed up your processes and free up time for higher-value tasks.

With no-code platforms such as Zapier, Make and Power Automate, you don't need to be a developer to set up powerful API integration workflows. Start by identifying your most time-consuming process, connect the relevant tools, and measure the time saved. You'll be surprised by the result.

The Belgian market has a favourable ecosystem, with local tools (Teamleader, Odoo, Ponto/Isabel) that integrate seamlessly with international solutions. Make the most of it to transform your SME into a connected, high-performing digital business.

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This article was written by the Espero-Soft team for the blog dedicated to entrepreneurs in Belgium. For support integrating your business tools, contact our experts.