Addressian is an address and postcode finding service. We specialise in offering a simple to use, lightweight and ultra-fast REST API.

Live Demo

Use the following field to test out our service. We offer the fastest address finding software-as-a-service you could find in the UK, from only £30 a month, and 20,000 API calls:

Start entering an address / postcode in the box below
for example: 64 Tanners hill or SE25

Getting Started

Making an API call is as simple as a GET request, along with your API key as header. Something like this:

GET{search_query}  ⏎ 

  "address": [
    "Flat 2",
    "Wesley Court",
    "2 Beckwith Road"
   "county": "Greater London",
   "postcode": "SE24 9LJ",
   "citytown": "London"
  "address": [
    "Flat 7",
    "Wesley Court",
    "2 Beckwith Road"
   "county": "Greater London",
   "postcode": "SE24 9LJ",
   "citytown": "London"

Get Postcode Details

Addressian also offers an API that returns very useful information about a postcode. Here is a snippet:

GET{postcode}  ⏎ 

  "country": "England",
  "waterSupplier": "United Utilities",
  "districtCode": "E08000003",
  "altitudeInMeters": 39,
  "indexOfMultipleDeprivation": 11449,
  "latitude": 53.436989,
  "county": "Greater Manchester",
  "receivesManyOrFewMailsPerDay": "few",
  "ward": "Old Moat",
  "msoa": "Manchester 035",
  "northing": 393381,
  "gridRef": "SJ849933",
  "builtUpSubDivision": "Manchester",
  "parishCode": "E43000157",
  "ruralUrban": "Urban major conurbation",
  "parish": "Manchester, unparished area",
  "constituencyCode": "E14000809",
  "wardCode": "E05011375",
  "gridRefQuality": 1,
  "censusOutputAreaCode": "E00026734",
  "longitude": -2.227906,
  "easting": 384957,
  "postcodeArea": "M",
  "postcode": "M20 3EQ",
  "msoaCode": "E02001079",
  "lsoaCode": "E01005273",
  "households": 10,
  "lsoa": "Manchester 035C",
  "creationDate": "1994-05-01",
  "population": 42,
  "postcodeDistrict": "M20",
  "distance_to_station": 1.30968,
  "countyCode": "E11000010",
  "builtUpArea": "Greater Manchester",
  "constituency": "Manchester, Withington",
  "district": "Manchester",
  "isInUse": true,
  "region": "North West",
  "policeForce": "Greater Manchester",
  "nearestStation": "Mauldeth Road"


Real-time reporting

Needless to say, you can monitor the usage of your API in your account:

If you like what you see, then head to the Pricing Plans and sign up. See you on the other side!