street

This API endpoint returns a list of street addresses for a given UK postcode.

Request URL

https://ws.postcoder.com/pcw/{apikey}/street/uk/{postcode}

Path parameters

Parameter	Description	Example
`apikey`	Your API key	`PCW45-12345-12345-1234X`
`postcode`	The URL-encoded UK postcode that you wish to look up	`nr1%201ne`

Querystring parameters

Parameter	Description	Example
`format`	Sets the format of the response, xml or json (default unless "application/xml" header is detected)	`format=json`
`identifier`	Specifies your own meaningful identifier for the request such as "websiteA" or "client123"; you can view usage for each identifier on the Identifier Usage page, which may be helpful when using your API key across multiple websites, apps or clients	`identifier=websiteA`
`addtags`	Specifies the extra address fields to include within the response using a comma-delimited list, supported values: latitude, longitude, udprn, deliverypointsuffix, usercategory... see additional response fields below for the full list	`addtags=latitude,longitude`
`callback`	Specifies the name of your JSONP callback function	`callback=jsoncallback`

Example request and response

Return UK streets with a postcode of NR1 1NE:

https://ws.postcoder.com/pcw/PCW45-12345-12345-1234X/street/uk/nr1%201ne?format=json

[
	{
		"summaryline": "St. Faiths Lane, Norwich, Norfolk, NR1 1NE",
		"street": "St. Faiths Lane",
		"posttown": "Norwich",
		"county": "Norfolk",
		"postcode": "NR1 1NE"
	}
]

Response fields

Field	Description	Example
`summaryline`	A summary of the street, ideal for displaying in a drop-down list	St. Faiths Lane, Norwich, Norfolk, NR1 1NE
`dependentstreet`	The dependent street
`street`	The street	St. Faiths Lane
`doubledependentlocality`	The double dependent locality
`dependentlocality`	The dependent locality
`posttown`	The post town	Norwich
`county`	The county	Norfolk
`postcode`	The postcode	NR1 1NE

Additional response fields

Use the addtags querystring parameter to specify a comma-delimited list of fields that you wish to add to the response. For example, to add latitude, longitude and udprn:

https://ws.postcoder.com/pcw/...?format=json&lines=2&addtags=latitude,longitude,udprn

Field	Description	Example
Coordinate data
`latitude`	ETRS89 latitude (ideal for use with mapping APIs)	52.6299163702
`longitude`	ETRS89 longitude (ideal for use with mapping APIs)	1.3018030246
`latitudeosgb`	OSGB36 latitude	52.6294875459
`longitudeosgb`	OSGB36 longitude	1.3035999409
`grideasting`	Easting OS Grid Reference (1m precision in units of 1m)	623545
`gridnorthing`	Northing OS Grid Reference (1m precision in units of 1m)	308689
Address fields
`deliverypointsuffix`	Delivery Point Suffix	3JS
`uniquedeliverypointreferencenumber`	Unique Delivery Point Reference Number (UDPRN); there is no additional credit cost for including this field; you can also use `addtags=udprn`	50959190
`multipleoccupancycount`	Multiple Occupancy Count - count of the number of multiple occupancy addresses for the delivery point	0
`administrativecounty`	Administrative County (top tier local government)	Norfolk
`postalcounty`	Former Postal County
`traditionalcounty`	Traditional County	Norfolk
`usercategory`	User Category ('R' for Residential, 'N' for Non-residential, 'L' for Large User)	N
`sortcode`	Sortcode for Royal Mail Mailsort	35529
`countrycode`	Country code within the United Kingdom	064
`country`	Country name within the United Kingdom	England
`welsh_dependentstreet`	Welsh language alternative for dependent street field
`welsh_street`	Welsh language alternative for street field
`welsh_doubledependentlocality`	Welsh language alternative for double dependent locality field
`welsh_dependentlocality`	Welsh language alternative for dependent locality field
`welsh_posttown`	Welsh language alternative for post town field
Special PAF keys
The `uniquedeliverypointreferencenumber` is populated across countries and is the recommended primary key. For Royal Mail PAF addresses only, the following keys can be used as a composite primary key in this order: `addresskey`,`organisationkey`,`postcodetype`.
`addresskey`	The 8-digit PAF Address Key from Royal Mail (UK only)	00001000
`organisationkey`	The 8-digit PAF Organisation Key from Royal Mail (UK only, '0' for Residential Small Users and Large Users)	00456120
`postcodetype`	The PAF Postcode Type from Royal Mail (UK only, 'S' for Small Users, 'L' for Large Users)	S
Census data
`oa11`	2011 Census Output Area	E00136551
`lsoa11`	2011 Census Lower Layer Super Output Area	E01033438
`msoa11`	2011 Census Middle Layer Super Output Area	E02006907
NHS data
`commissioningregioncode_gss`	NHS Commissioning Region Code (ONS GSS)	E40000007
`commissioningregionname`	NHS Commissioning Region Name	NHS England East of England
`areateamcode_nhs`	NHS Area Team Code (NHS)	QMM
`areateamcode_gss`	NHS Area Team Code (ONS GSS)	E54000022
`areateamname`	NHS Area Team Name	NHS Norfolk and Waveney Integrated Care Board
`clinicalcommissioninggroupcode_nhs`	NHS Clinical Commissioning Group Code (NHS)	26A
`clinicalcommissioninggroupcode_gss`	NHS Clinical Commissioning Group Code (ONS GSS)	E38000239
`clinicalcommissioninggroupname`	NHS Clinical Commissioning Group Name	NHS Norfolk and Waveney ICB - 26A
Government data
`localauthoritycode`	Local Authority Code	E07000148
`localauthorityname`	Local Authority Name	Norwich
`electoralwardcode`	Electoral Ward Code	E05012910
`electoralwardname`	Electoral Ward Name	Thorpe Hamlet
`electoralcountycode`	Electoral County Code	E10000020
`electoralcountyname`	Electoral County Name	Norfolk
`parliamentaryconstituencycode`	Westminster Parliamentary Constituency Code	E14000864
`parliamentaryconstituencyname`	Westminster Parliamentary Constituency Name	Norwich South
`europeanelectoralregioncode`	European Electoral Region Code	E15000006
`europeanelectoralregionname`	European Electoral Region Name	Eastern
`nationalparkcode`	National Park Code	S21000003
`nationalparkname`	National Park Name	The Cairngorms National Park

Integration advice

URL encode all special characters (including /) in your request parameters with %xx encoding
Verify your request was successful by checking for an HTTP status code of 200; see all HTTP status codes with descriptions
When using your API key across multiple websites, apps or clients, set the identifier querystring parameter to a meaningful value such as "websiteA" or "client123"; you'll then be able to view these identifiers and the number of requests made by each one on the Identifier Usage page
Treat all response fields as optional

Credit cost

Each request costs the following number of credits:

Standard request	Enhanced request using `addtags`
1.5 credits	1.9 credits

Buy a credit pack or set up a monthly plan to use with all Postcoder endpoints.