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API Development & Integrations

API Development & Integrations

CAO-TECH builds custom APIs and connects the systems your business already runs on — so data moves automatically between your website, apps, payments, inventory and CRM instead of being copied by hand.

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The Challenge

Disconnected tools cost time every day

When systems do not talk to each other, teams re-key orders, reconcile spreadsheets and chase mismatched data. A well-built integration removes that work and the errors that come with it.

Capabilities

What we handle

  • Custom API design

    Clear, versioned endpoints with authentication and documentation.

  • System integrations

    Two-way sync between platforms such as eCommerce, POS, CRM and accounting.

  • Webhooks & events

    Real-time updates when orders, payments or records change.

  • Security

    Least-privilege access, key management, validation and rate limiting.

  • Data mapping

    Reliable transformation between different data models and formats.

  • Monitoring & retries

    Logging, alerts and safe retry logic so failures are visible and recoverable.

Deliverables

What we build

  • Inventory & order sync

    Keep products, stock and orders aligned across channels.

  • Payment integrations

    Checkout, subscriptions, refunds and reconciliation.

  • CRM & marketing connections

    Send leads and customer activity where your team works.

  • Public or partner APIs

    Give customers and partners secure access to your data or services.

Our Process

How We Deliver

  1. 01

    Discover

    We learn your goals, users and constraints.

  2. 02

    Plan

    Scope, roadmap and a clear estimate.

  3. 03

    Design

    User-friendly flows and interfaces.

  4. 04

    Build

    Clean, secure, well-tested code.

  5. 05

    Launch

    Deployment, handoff and training.

  6. 06

    Support

    Maintenance, updates and growth.

Technology

Technology & integrations

We work with documented platform APIs and build our own where none exist.

  • REST & JSON
  • Webhooks
  • OAuth 2.0
  • WordPress REST API
  • WooCommerce
  • Stripe
  • Square
  • Google APIs
  • AI model APIs

Related Work

View All Work
DealSplit iPhone app: nearby deals, a paper towel split at $7.50 per share, and a pickup QR code

DealSplit

iPhone & Web Marketplace

CAO-TECH’s own iPhone and web app for splitting bulk purchases with neighbors: claim a share, pay the organizer at pickup, no fees. Free on the App Store.

  • iOS
  • SwiftUI
  • Next.js
  • Google Cloud
  • PostgreSQL
HRMgnt iPhone app: the clock screen, the manager overview and a weekly timesheet

HRMgnt

Employee Time Clock & Timesheets for iPhone

CAO-TECH’s own time clock for businesses with hourly staff: employees clock in on the store Wi-Fi from an iPhone, managers approve timesheets and time off, and approved hours can go to payroll. Free on the App Store.

  • iOS
  • SwiftUI
  • React
  • Cloudflare Workers
  • Firebase

Carevero

Healthcare Price Comparison

A healthcare price comparison web application.

  • Web App
  • Database
  • API

FAQ

Frequently Asked Questions

Can you connect two systems that do not have a built-in integration?

Usually, yes — if both systems expose an API, export or webhook. We review what each system supports and propose the most reliable approach.

What happens when an integration fails?

We build in logging, alerts and safe retries so problems are caught early and data is not silently lost.

Do you document the APIs you build?

Yes. You receive endpoint documentation and configuration notes so the integration is maintainable.

Is my data secure in transit?

Integrations use encrypted connections, scoped credentials stored server-side, and input validation on every request.

Ready to bring your idea to life?

Tired of copying data between systems?

List the tools you use and where data gets stuck. We will map out an integration plan.

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