UK Postcode Database

Address Validation API

Lightning-fast UK postcode to address lookup with intelligent autocomplete. Access over 30 million addresses instantly with our powerful API featuring type-ahead search, fuzzy matching, and comprehensive address data.

30M+ Addresses

PAF Certified

Sub-50ms Response

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Complete Address Validation Solution

Everything you need for accurate UK address validation and verification

Comprehensive Address Database

Access to the complete UK address database with over 30 million addresses including residential, commercial, and new build properties.

30M+ UK addresses
Daily updates
Royal Mail PAF licensed

Type-Ahead Search

Intelligent autocomplete functionality that finds addresses as users type, improving data accuracy and user experience.

Real-time suggestions
Fuzzy matching
Error correction

Lightning Fast API

Ultra-fast postcode lookups with response times under 100ms, globally distributed infrastructure, and 99.9% uptime guarantee.

Sub-50ms response
Global CDN
99.9% uptime SLA

Simple API Integration

Easy-to-integrate RESTful API with comprehensive documentation, code examples, and client libraries for all major platforms.

RESTful API
SDK libraries
Code examples

PAF Certified Data

Royal Mail Postcode Address File (PAF) licensed data ensuring the highest quality, accuracy, and up-to-date address information.

Royal Mail licensed
Regular audits
Quality assured

Security & Compliance

Enterprise-grade security with HTTPS encryption, GDPR compliance, and secure data handling practices.

HTTPS encryption
GDPR compliant
Secure authentication

Validation Capabilities

Comprehensive address verification features

Deliverability Check

Verify that addresses are deliverable by Royal Mail, reducing failed deliveries and improving logistics efficiency.

Format Validation

Check address format compliance with Royal Mail standards, ensuring proper structure and component placement.

Component Parsing

Automatically parse addresses into structured components (building, street, town, county, postcode) for database storage.

Duplicate Detection

Identify duplicate and similar addresses in your database, helping maintain data quality and prevent redundancy.

Change Notifications

Get notified when addresses change or become outdated, keeping your database current with latest Royal Mail data.

Audit Trail

Complete validation history and audit trail for compliance and quality assurance purposes.

Transparent Pricing

Transparent Validation Pricing

Pay only for what you use with no hidden fees

Calculate Your Credit Pack Cost

Credits valid for 12 months or unlimited if you use 1,000+ credits/month

Credit Pack Size: 10,000

500 100,000

Include UPRN (Unique Property Reference Number)

+1 credit per lookup — UPRN data from Ordnance Survey provides the unique identifier for every addressable location in Great Britain, enabling enhanced geocoding and data matching.

Price per credit / lookup

Volume discount applied

3.1p

Total pack cost

Excl. VAT @ 20%

£310.00

Total credits

In this pack

10,000

Credits valid for 12 months or never expire if you use 1,000+ per month

Auto-renewal available: Set up automatic credit pack reordering when your balance reaches a configurable trigger count

How credits work: 1 credit = 1 address or postcode lookup against the PAF dataset. Note: If 5 consecutive searches are performed without an address being returned, 1 credit is deducted.

Every credit pack includes:

Real-time validation
Address standardization
Confidence scoring
PAF certified matching
Geocoding (lat/long) included FREE
Component parsing
Deliverability check
Optional UPRN from Ordnance Survey (+1 credit)
Optional auto-renewal (trigger-based reordering)
Technical support
API documentation

Always Low Price Guarantee

Our 'always low price guarantee' explained

ePostcode is not only one of the most established postcode address management services in the UK, having launched our first web service in the summer of 2006, but we also promise to offer the best value.

Now that transactional postcode lookup services have become common place and some might say more of a commodity rather than an unique offering, we have introduced our 'always low price guarantee', to ensure that we remain the most cost effective address management service in the UK, both now and in the future. We want to ensure that once you've switched to ePostcode, there would be no reason to go anywhere else.

We do this to not only offer great value to our customers but also with the assurance that we don't compromise on the performance and security of our search services, that our customers have rightly come to expect. Unlike other providers we don't expire your credits either, all we ask is that you purchase a minimum credit pack size each month, and we take care of the rest.

Best Value Promise

Most cost-effective address service in the UK, guaranteed

Since 2006

Over 18 years of trusted service and expertise

Credits Don't Expire

With minimum monthly purchase, your credits never expire

No Compromise

Best prices without sacrificing performance or security

Easy API Integration

Get started in minutes with our simple RESTful API

API Features

RESTful API - Simple HTTP requests
JSON Responses - Structured validation results
Real-Time - Instant validation
Secure - HTTPS with API key auth
Confidence Scores - Match quality ratings
SDK Libraries - For major languages

Request API Access

Example API Request

// Search for Address to Validate
curl -X GET "https://wsp.epostcode.com/uk/v1/Search?key=YOUR_API_KEY_HERE&query=10%20Downing%20Street%20London"

// JavaScript (Fetch)
fetch('https://wsp.epostcode.com/uk/v1/Search?key=YOUR_API_KEY_HERE&query=10 Downing Street London')
.then(response => response.json())
.then(data => {
  console.log(data);
  // Validate address match
  if (data.items && data.items.length > 0) {
    const validAddress = data.items[0];
    console.log('Valid:', validAddress.address);
    console.log('UPRN:', validAddress.uprn);
  }
})