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Address Finder
Search and validate UK addresses in real-time
Setup Address Finder in moments with our easy to install address lookup API

  • Try it Yourself

Integrate Address Validation with our Address Finder demos and documentation

Why Use Address Finder?

Rapid Address Entry

Receive address suggestions as you type using our typeahead functionality with a response time of less than 100ms

Fuzzy Search

25% of all entries contain a mistake. Our Fuzzy Search helps by reducing keystrokes to gain an accurate address

Word Abbreviations

Our Address Search technology accepts abbreviations such as rd (Road), st (Street) and wy (Way)

Transposed Letters

Our Address Finder tool can handle accidental switching of letters for instance Liecester (Leicester)


Limit your address suggestions against a list of any attribute including post town, outward code or country


Limit your address suggestions to a geospatial box defined by your criteria

Why Ideal Postcodes?

Cutting edge

Cutting Edge

The most fully-featured UK address validation and postcode lookup tools available

Incredibly accurate

Unmatched Accuracy

Access the UK's most accurate data with rootftop accurate geolocations, UPRN and more

Quality support

Well Supported

Simple integration with clear documentation, open-source libraries and live support

GDPR compliant

Data Protected

GDPR Compliant. Your customer data never leaves our UK and EU data centres

Agile framework

Agile Framework

Scale your business and improve operations with a faster and more efficient process

High quality

High Quality

Ideal Postcodes embraces continuous improvement and launches industry leading solutions

Social Responsibility

Social Responsibility

We believe in giving back to the community. Our address validation solutions provide screen reader compatibility



Easy products, integrations, documentation, simplified billing and a great user interface

Flexible Licensing

As Royal Mail Postcode Address File specialists we provide niche licensing options


Public Sector

Make full use of address data with cost-effective licensing for public sector organisations


Small charities can benefit from cost-effective plans to increase website donations, gift aid registration and to speed up in-person collection

Trusted by Many

We work with developers across small businesses and startups through to public and FTSE 100 organisations

Client Logos

Address Finder API

Start searching addresses in moments with our ready made libraries

const { Client, autocomplete } = require("@ideal-postcodes/core-node");

const client = new Client({ api_key: "iddqd" });

const response = await autocomplete.list(client, { 
    query: {
        query: "221b bake",
        api_key: "iddqd"