---
title: "API integration layer for legacy systems · BuildWithIK"
description: "One API layer over the core systems you already pay for, so your channels survive the next upgrade instead of breaking on it. Fits any sector."
url: https://buildwithik.com/products/integration-layer
---

# Integration layer

> An API layer over the core systems you already pay for, so channels survive upgrades.

## How it works

- What goes in: The core systems you already pay for
- What it does: Puts one API layer over them
- What you get: Channels that survive the next upgrade

## Where it fits

Any sector. For example: Banking, Finance & accounting.

## How we deliver

- Three-day sprints. A working release every two weeks. A written recap every week. The first build of every project is a substantial release.
- Roughly half of a US agency's cost, fixed in writing before we start.
- NDA first. Full handover of code and documents. No lock-in. 30-day warranty.

## Questions people ask

### What does Integration layer do?

An API layer over the core systems you already pay for, so channels survive upgrades.

### Where does Integration layer fit?

Any sector. For example: Banking, Finance & accounting.

### What does a first build cost?

Roughly half of a US agency's cost, fixed in writing before we start. No prices on the site, on purpose.

---

Canonical page: https://buildwithik.com/products/integration-layer. Book a 20-minute call: https://buildwithik.com/book. Open it on the bench: https://buildwithik.com/bench?product=integration-layer