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API Development & Integration

Connect your website to CRMs, ERPs, payments and other tools. Most businesses run on a dozen tools that do not talk to each other, so someone spends hours copying data between them. Integrations remove that work and the mistakes that come with it.

  • Integration plan
  • API development
  • Data mapping
API Development & Integration
100%Custom design
Built for Core Web Vitals
API Development & Integration

What our API Development & Integration service includes

Most businesses run on a dozen tools that do not talk to each other, so someone spends hours copying data between them. Integrations remove that work and the mistakes that come with it.

We connect websites and applications to CRMs such as HubSpot and Salesforce, accounting tools like Xero and QuickBooks, payment gateways, shipping providers and ERPs. When off-the-shelf connectors fall short, we write the integration ourselves.

We also design and build APIs for your own products, with clear documentation, authentication and rate limits.

What you receive

  • Integration plan
  • API development
  • Data mapping
  • Error handling
  • Testing
  • Documentation
  • Monitoring setup
  • Support
What our API Development & Integration service includes
You own the code & design
Key features

Why clients choose our API Development & Integration

01

CRM integration

Leads and customers synced automatically.

02

Payment gateways

Stripe, PayPal, Adyen, Checkout.com and regional providers.

03

ERP and accounting

Orders, invoices and stock kept in sync.

04

Shipping and logistics

Rates, labels and tracking.

05

Custom APIs

Documented REST or GraphQL APIs.

06

Monitoring

Errors logged and alerted before they cause problems.

Perfect for

Who our API Development & Integration service is for

  • Businesses with disconnected tools
  • Ecommerce stores
  • SaaS products
  • Companies with legacy systems
The WDP difference

What you can expect

  • Fixed, itemised quotesClear scope and price before work begins.
  • Your time zoneCalls in your business hours, updates by email or Slack.
  • Senior quality, efficient pricingWorld-class work at rates that beat most local agencies.
  • Full ownershipYour website, accounts and data always belong to you.
How we work

From first call to launch day

A clear, six-step process designed for clients across time zones. You always know what happens next and what you will receive.

Start with a free quote
  1. 01
    Day 1

    Discovery call

    A video call in your time zone to understand your business, audience, goals and competitors.

    Clear project brief
  2. 02
    Within 24-48h

    Fixed, itemised quote

    Scope, timeline and a fixed price in your currency. No surprises and no hidden extras.

    Written proposal
  3. 03
    Week 1-3

    UX & visual design

    Sitemap, wireframes and high-fidelity Figma designs, refined with your feedback.

    Approved designs
  4. 04
    Week 2-6

    Development

    Clean, fast, accessible code with CMS, integrations, SEO and analytics built in.

    Staging site to review
  5. 05
    Launch day

    QA & launch

    Testing on real devices and browsers, speed checks, redirects and a careful go-live.

    Live website
  6. 06
    Ongoing

    Support & growth

    Training, maintenance and optional SEO, CRO and new features as you grow.

    Monthly report
FAQ

API Development & Integration: frequently asked questions

01Can you connect our website to our CRM?

Yes. Forms, leads and customer data can sync to almost any CRM.

02What if a tool has no ready-made integration?

We build a custom integration using its API, or use a tool like Zapier or Make where that is enough.

03Is the data secure?

Yes. We use encrypted connections, secure credential storage and only the permissions each integration needs.

04Do you document the APIs you build?

Yes, with OpenAPI documentation and examples.

Get a free quote

Tell us about your project. We reply within one working day with clear next steps and a fixed quote.

No spam. NDA available on request.

Start a project

Ready to start your API Development & Integration project?

Tell us about your project and get a fixed, itemised quote within 24 to 48 hours.