Skip to content
API integrations · Smart Design

We connect platforms, payments,
logistics and AI

One integration that works saves hours of manual work every day. We make your website, webshop or app talk to the systems your business runs on.

Payments, shipping and accounting flow through automatically: from the first click to the booked invoice. And with AI agents via MCP, a language model gets controlled access to your own data and processes.

System architecture — API ecosystem

Stripe
MoMollie
PayPal
Adyen
PNPostNL
DHL
bpbpost
Deutsche Post
Claude
AIOpenAI
Google
Google Cloud
Uber
ExExact Online
TwTwilio
Shopify
Your project
n8n
Zapier
SlSlack
HubSpot
Live API ecosystem
Ecosystem

Connected to the services you already use

Your business rarely runs on a single system. We make all those separate services work as one, with your own platform at the centre.

What we connect to:

  • Payment providers such as Mollie, Stripe, PayPal and Adyen
  • Shipping and logistics: PostNL, DHL, bpost and more
  • Cloud infrastructure and storage
  • Maps, addresses and location services
  • E-commerce platforms and marketplaces
  • Business SaaS: CRM, ERP and accounting
  • AI models and vector databases

Is your system not listed? If it has an API, we can almost always connect to it.

Stripe
MoMollie
PayPal
Adyen
PNPostNL
DHL
bpbpost
Deutsche Post
Claude
AIOpenAI
Google
Google Cloud
Uber
ExExact Online
TwTwilio
Shopify
AI & automation

Integrations that think, not just forward

A classic integration moves data from A to B. We go one step further: the integration assesses what comes in and picks the right next step itself.

An order, e-mail or form is recognised, sorted and handled straight away. You stay in control, the system does the repetitive work.

Examples:

  • Order flow from payment to shipping, fully automatic
  • Smart sync of customers, stock and prices
  • AI that classifies messages and prepares decisions
  • Answers drawn from your own documents (RAG)
  • Customer service with AI that takes actions itself (tool calling)

Every step is logged, so you can always see what happened and why.

AI workflow orchestration

$ trigger: new order #10482

→ payment confirmed (Mollie)

→ shipment created (PostNL)

→ AI classification (Claude)

→ customer notified (WhatsApp)

→ CRM updated (HubSpot)

→ reporting (BigQuery)

✓ Workflow completed in 240 ms
MCP & AI agents

AI agents around your own systems

With the Model Context Protocol (MCP) you give an AI model access to your ERP, webshop or database through clearly defined tools. The model can look things up, check and act, but only within the limits you set.

We build those MCP servers and put specialised agents around them, each doing one task well.

What we deliver:

  • Custom MCP servers for your systems and data
  • Agents with one clear task
  • Permissions per tool, audit log and human approval
  • Agents that hand work off to each other
  • Works with any AI model that supports MCP

Sensitive actions, such as booking a shipment or sending an invoice, wait for your approval.

MCP server · your-erp

tools/list

→ get_order(id)

→ check_stock(sku)

→ create_invoice(order)

→ book_shipment(order)

resources/list

→ erp://customers

→ erp://products

book_shipment → waiting for human approval

agent: order-desk · 3 tools · 1.4 s
Custom work

Custom API engineering

If the integration does not exist yet, we build it. From your own API for your app to middleware between business systems.

REST APIs
GraphQL
Secure authentication (OAuth2 / JWT)
Microservices
Event-driven architecture
Middleware for enterprise systems
MCP servers and tool interfaces
Webhooks and real-time streams
API documentation (OpenAPI)
Workflow automation

Automate with n8n and more

Not every integration needs custom code. With n8n we build clear workflows you can follow and adjust yourself, on your own server if you prefer.

Where needed we add custom code or tools such as Zapier and Make.

Among other things we connect:

  • CRM systems
  • Accounting
  • Stock and inventory
  • Customer service
  • Payments
  • AI models and agents
n8nZapierMakeHubSpotExact OnlineMoneybirdWhatsAppSlack
By industry

Integrations for your industry

Every industry has its own systems and rules. We know the common platforms and build on them.

Logistics & carriers

Labels, track & trace and pickups handled automatically.

Finance & accounting

Invoices, payments and ledger always in sync.

Tax & compliance

VAT calculation, e-invoicing and reports that follow the rules.

Travel & airport systems

Flight data, bookings and transfers in one view.

Payment gateways

Secure checkout, subscriptions and refunds.

Marketplaces

Products, stock and orders synced with bol, Amazon and eBay.

Security

Built secure and scalable

An integration often touches your most sensitive data: customers, payments and orders. That is why we design for security, error handling and growth from day one.

Included as standard:

  • Secure authentication and key management
  • Encrypted traffic
  • Scalable infrastructure
  • Fault tolerance and automatic retries
  • Monitoring and logging
  • Scoped permissions and audit trail for AI agents

256-bit

Encryption

OAuth 2.0

Authentication

99.9%

Uptime target

Why Smart Design

One partner for all your integrations

We build the website, the webshop and the integrations around them. Everything fits together, and you have one point of contact when something needs to change.

40+

Platform types connected

< 300 ms

Average response time target

99.9%

Uptime target

FAQ

Questions about API integrations

An API integration lets two systems exchange data automatically, such as your webshop and your accounting software. It saves manual work, prevents typing errors and means you work with the same, up-to-date data everywhere.

Yes, that is exactly our strength. We bring payments, shipping, accounting, CRM and AI together in one platform, with one admin panel and central logging.

A standard integration, such as a payment provider or carrier, is often live within one to two weeks. Larger projects with several systems or AI agents are planned in phases, so you see the first results quickly.

Certainly. We develop REST and GraphQL APIs for your app, partners or internal systems, with secure authentication and full OpenAPI documentation.

Yes. An integration can classify messages, draft answers from your own documents or prepare decisions. For sensitive steps we build in a human check.

An MCP server is a standardised gateway that lets AI models use the tools and data of your systems. You need one as soon as you want an AI assistant or agent to actually look something up or carry out a task in your own software.

By giving the agent only the tools it needs, with permissions per tool. Every action goes into an audit log and sensitive operations wait for human approval. Keys stay on the server.

Ready to connect?

Let your systems work together

Tell us which systems you use and what you want to automate. We think along with you and show what is feasible.