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Postcode infrastructure for modern operations

Add UK postcode lookup to your app in minutes

Use the Zetty API, drop-in JavaScript widget, or React component to deliver fast, accurate address lookup and validation in any app, checkout, or workflow.

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  • Setup in minutes

Postcode

SW1A 1AA

SW1A 1AA

Buckingham Gate

London

SW1A 1AA

Verified address

Auto-fill address fields

Address line 1

Buckingham Gate

City

London

County

Greater London

Country

United Kingdom

Postcode

SW1A 1AA

API

cURL
curl -X GET \
  "https://api.zetty.co.uk/v1/lookup/SW1A1AA" \
  -H "Authorization: Bearer your_api_key"

JavaScript Embed

HTML
<script src="https://cdn.zetty.co.uk/zetty.js"
        data-key="pk_live_xxx"></script>
<input data-zetty-postcode />

React Component

TSX
<PostcodeLookup
  apiKey="pk_live_xxx"
  onSelect={(address) => setAddress(address)}
/>

Fast & Reliable

<100ms average response time with 99.99% uptime.

Royal Mail Data

PAF compliant data for the highest address accuracy.

Secure by Design

HTTPS, rate limiting, and API keys to keep you safe.

Built for Scale

From startups to enterprise, we scale with you.

Choose your integration

Three ways to ship better

Pick the integration that fits your stack. Same powerful data, your way.

Popular
JS

Zetty.js (Embed)

Drop-in JavaScript widget. Works on any website, no framework required.

  • Add with one script tag
  • Autocomplete UI included
  • Auto-fill address fields
<script src="https://cdn.zetty.co.uk/zetty.js"
        data-key="pk_live_xxx"></script>
<input data-zetty-postcode />
View guide

React Component

Production-ready component for React apps and frameworks like Next.js.

  • TypeScript support
  • Fully customisable
  • Works with any form library
import { PostcodeLookup } from "zetty-react";

<PostcodeLookup
  apiKey="pk_live_xxx"
  onSelect={(address) => setAddress(address)}
/>
View docs

Zetty API

Raw REST API for maximum flexibility and control.

  • Simple REST endpoints
  • JSON responses
  • SDKs coming soon
curl -X GET \
  "https://api.zetty.co.uk/v1/lookup/SW1A1AA" \
  -H "Authorization: Bearer your_api_key"
API reference

Works with the tools you love

Trusted by developers building on leading platforms.

See all integrations
Shopify
NEXT.js
WordPress
WooCommerce
stripe

The road ahead

Building the complete operations stack

Postcode lookup is just the beginning. We are building the tools modern operations teams need to save time and ship more.

See roadmap

1. Postcode Lookup

Accurate address data and validation.

Live Now

2. Shipping Integrations

Connect to carriers and get better rates.

Coming Soon

3. Warehouse Management

Inventory, picks, and stock control.

Planned

Start building with Zetty today

Create your free account and get 1,000 lookups every month.

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