OS Places API
Address search and geocoding over AddressBase Premium - every UPRN in the United Kingdom, Jersey, Guernsey, and the Isle of Man, with current, provisional, and historic address records and TOID cross-references. Premium or PSGA licensed; no OpenAPI is published.
OS Places API is one of 12 APIs that Ordnance Survey publishes on the APIs.io network, described by a machine-readable OpenAPI specification.
Tagged areas include Addressing, Geocoding, UPRN, and Property Data. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and an API reference.
This API exposes 7 operations across 7 paths, organized into 7 resource areas, and defines 3 schemas. It is described by OpenAPI 3.0.1, at version v1.0.
Requests are made against a single base URL, https://api.os.uk/search/places/v1.
Metadata
The identity and technical contract details declared by the specification.
Authentication & Security 1
OS Places API declares
1 security scheme
for authenticating requests.
An API key is passed in the query as key (api-key).
By default, every request must be authenticated.
Paths & Operations 7
Across 7 paths, the API surfaces 7 operations — 6 GET, 1 POST. They span 7 resource areas: Bounding box, Find, Nearest, Polygon, Postcode, Radius, UPRN. Each is listed below with its method, path, parameters, and response codes.
Find all addresses inside a bounding box.
A free text search designed for quick use.
Find the closest address to a given point.
Find all addresses in a polygon or multi-polygon object.
A search based on a property’s postcode
Find all addresses that intersect a given circle.
A search that takes a UPRN as the search parameter.
Schemas 3
The contract defines 3 schemas that model the data the API accepts and returns. The most detailed are LPI (55 properties), DPA (43 properties), SearchResult (2 properties). Each schema is shown below with its type and property counts.
Specification
The full machine-readable OpenAPI contract behind this narrative.
Source
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Other APIs Ordnance Survey publishes across the network.
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