1,800,000+ UK Postcodes

UK Address API Fast. Free. Powerful.

Postcode lookup, address autocomplete, company search, and geocoding. 1,000 free requests/month. No credit card required.

Get Free API Key Read Documentation

99.9% Uptime

<50ms Response

GDPR Compliant

Try it live

Enter a UK Postcode

{
  "postcode": "SW1A 1AA",
  "latitude": 51.501009,
  "longitude": -0.141588,
  "admin_district": "Westminster",
  "region": "London",
  "country": "England"
}

This is a live API call. No API key needed for demo.

Everything You Need

Comprehensive UK address data at your fingertips

Postcode Lookup

Get full address details, coordinates, and administrative areas for any UK postcode.

Autocomplete

Fast, responsive address autocomplete. Perfect for forms and checkout flows.

Company Search

Find companies registered at any address using Companies House data.

Geocoding

Convert postcodes to coordinates and find nearest postcodes to any location.

Bulk Lookup

Process up to 100 postcodes in a single API call. Perfect for data enrichment.

Auto-Updating

Data updated quarterly from official government sources. Always current.

Simple, Transparent Pricing

Start free. Scale as you grow.

Free

Perfect for testing

£0/mo

1,000 requests/month
All endpoints
10 req/minute

Get Started

Starter

For growing apps

£9/mo

10,000 requests/month
Bulk lookup
30 req/minute

Choose Starter

POPULAR

Pro

For production apps

£29/mo

100,000 requests/month
Priority support
60 req/minute

Choose Pro

Enterprise

Custom solutions

Custom

Unlimited requests
Dedicated support
SLA guarantee

Contact Sales

Easy Integration

Add UK address lookup to your app in minutes

curl -X GET "https://address.supix.co.uk/v1/postcodes/SW1A1AA" \
  -H "X-API-Key: alup_your_api_key_here"

const response = await fetch(
  'https://address.supix.co.uk/v1/postcodes/SW1A1AA',
  {
    headers: {
      'X-API-Key': 'alup_your_api_key_here'
    }
  }
);

const data = await response.json();
console.log(data);

import requests

response = requests.get(
    'https://address.supix.co.uk/v1/postcodes/SW1A1AA',
    headers={'X-API-Key': 'alup_your_api_key_here'}
)

data = response.json()
print(data)

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'https://address.supix.co.uk/v1/postcodes/SW1A1AA');
curl_setopt($ch, CURLOPT_HTTPHEADER, ['X-API-Key: alup_your_api_key_here']);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

$response = curl_exec($ch);
$data = json_decode($response, true);

print_r($data);