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Ordnance Survey Open Data API

Operations providing access to OpenData products.

Ordnance Survey Open Data API is one of 25 APIs that Ordnance Survey publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Open Data. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and an API reference.

This API exposes 4 operations across 4 paths, and defines 6 schemas. It is described by OpenAPI 3.2.0, at version 1.0.0.

Requests are made against a single base URL, https://api.os.uk/downloads/v1/.

4 operations 4 paths 6 schemas 4 GET

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
1.0.0
Base URL
https://api.os.uk/features/ngd/ofa/v1
Authentication
OAuth 2.0, API Key, API Key
Resource Areas
1

Authentication & Security 3

Ordnance Survey Open Data API declares 3 security schemes for authenticating requests. It supports OAuth 2.0 (OAuth2) using the clientCredentials flow. An API key is passed in the query as key (APIKeyQuery). An API key is passed in the header as key (APIKeyHeader).

Paths & Operations 4

Across 4 paths, the API surfaces 4 operations — 4 GET. Each is listed below with its method, path, parameters, and response codes.

OpenData 4

Operations providing access to OpenData products.

GET
/products
Returns a list of the OpenData products that are available to download.
1 param → 200
GET
/products/{productId}
Returns details about a specific OpenData product.
1 param → 200404
GET
/products/{productId}/downloads
Returns a list of downloads for a specific OpenData product, or redirects to the actual download if requested.
6 params → 200307404
GET
/products/{productId}/images/{index}
Returns a HTTP redirect, pointing to thumbnail images for the specified OpenData product.
3 params → 200307404

Schemas 6

The contract defines 6 schemas that model the data the API accepts and returns. The most detailed are Product (17 properties), ThirdPartyInfo (4 properties), Download (4 properties), Format (2 properties). Each schema is shown below with its type and property counts.

Area
string
This describes the geographical area that a download covers. GB is all of Great Britain, while codes like 'HP' cover National Grid Reference squares.
Format
object
Information about the format that a download is available in.
2 properties 1 required
Download
object
Information about a specific download file that is made available through this API.
4 properties 2 required
ProductDownload
Information about a specific OpenData file that is made available through this API.
ThirdPartyInfo
object
Information about the data provider for third-party products.
4 properties 4 required
Product
object
Information about a product made available through this API.
17 properties 5 required

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

ordnance-survey-opendata-api-openapi.yml Raw ↑

Other APIs Ordnance Survey publishes across the network.

OS Match & Cleanse API (withdrawn)
OS OAuth 2 API
Ordnance Survey Bounding box API
Ordnance Survey Collections API
Ordnance Survey Data Collections API
Ordnance Survey Data Packages API
Ordnance Survey Features API
Ordnance Survey Find API
Ordnance Survey Get Capabilities API
Ordnance Survey Landing Page API
Ordnance Survey Nearest API
Ordnance Survey OS OpenData Users API
Where this information came from

This is an independent, third-party profile of Ordnance Survey Open Data API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

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