UK Postcode API serving up Open Data
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cblanc Merge pull request #218 from ideal-postcodes/snyk-fix-qilpsf
[Snyk] Fix for 1 vulnerable dependencies
Latest commit a164aa6 Nov 15, 2018

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Query for UK postcodes and geolocations over HTTP. uses the Office for National Statistics Postcode Directory.

Documentation can be found at


Please make sure you have the following available:

We also have an end-to-end guide to install on a fresh virtual machine in the wiki.

Install & Download Data & Run

Download and install

$ git clone

$ cd && npm install

Configure Postgres and Seed Database is packaged with a script to setup and download the ONS Postcode Directory. To run this, navigate into the repository directory and run:

$ npm run setup

This script will prompt you for Postgres superuser credentials. This privilege is required to create a new user, database, extensions and then to load the data. For the security conscious, you can find out how this works by reading our installation notes and the script itself. Other install methods are available but require a bit of extra work.

You can change the Postgres username/password yourself but you will need to update 'config/config.js' with the relevant credentials.

The import process takes around 10 minutes to complete.

Run it

node server.js // Default environment is development


This repository builds both the application and database services as docker containers.


The application is packaged as a Docker container identified on the Docker Hub as idealpostcodes/

Example usage:

docker run -d -p 8000 idealpostcodes/

Configuration available via Environment Variables:

  • PORT (HTTP Port to run on)


idealpostcodes/ points to a PostgreSQL & PostGIS base image and preloads the latest pg_dump in the build process. Upon starting a container for the first time, PostGIS will be enabled and the pg_dump will take around a minute to restore.

Example usage:

docker run -p 5432 -e POSTGRES_USER=postcodesio -e POSTGRES_DB=postcodesiodb -e POSTGRES_PASSWORD=password idealpostcodes/

As this contains the official postgres base image, the available configuration environment variables are documented here:


$ npm run setup_test_db # create test database

$ npm test

External Libraries

  1. Java Library by Deepak Sunanda Prabhakar

  2. PHP Libraries

  3. Ruby Library by James Ruston

  4. Node.JS Library by billinghamj

  5. Python Library by Gokhan Karadas

  6. C# Library by Mark Embling

  7. R Library by Eryk Walczak. Read the blog post.

  8. Hack Library HackPostcodes by Matt Barber

  9. Wolfram Language Library Postcode by Arnoud Buzing

  10. Google Sheets Addon by Ed Patrick