OS Linked Identifiers API
The OS Linked Identifiers API is published by Ordnance Survey and provides free access to relationships between key identifiers used across UK geospatial and property datasets, including UPRNs (property addresses), USRNs (street references), and OS MasterMap TOIDs. It allows users to link datasets that use different identifier schemes, for example connecting a property address to the street it sits on. The relationships exposed are drawn from OS Premium data products but made available through this API without charge. It is useful for organisations needing to cross-reference housing, address, and street-network data held under different identifier systems.The OS Linked Identifiers API allows you to access the valuable relationships between properties, streets and OS MasterMap identifiers (TOIDs). Benefit from the valuable relationship found in OS Premium products. Link together datasets that are using different identifiers; for example, linking a property address (UPRN) to the street that it’s on (USRN). The OS Linked Identifiers API allows users to access the valuable relationships between properties, streets and OS MasterMap identifiers for free. An identifier is a unique reference assigned to a specific thing, so when you are talking to someone else you can use it to ensure you.
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Data schema (3 fields)
Click a field to see example values.
| Field | Type | Description |
|---|---|---|
| url | text | — |
| @id | text | — |
| name | text | — |
Schema inferred from the distribution file's first records 28 days ago. Column types are sampled estimates, not source-declared.
Query the data
Pick columns and a sort, then fetch a live preview straight from the source. Choose an API-filterable column (marked ▾) under “Where” to pick from its list of values.
Sample data (1 record)
| url | @id | name |
|---|---|---|
| https://osmetadata.astuntechnology.com/geonetwork/srv/search#Data Catalogue | https://osmetadata.astuntechnology.com/geonetwork/srv/search# | Data Catalogue |
Live sample captured at profiling time — values may have changed upstream.
Verification Status
Using the API
Configuration
- Base URL
- https://api.os.uk
Query examples
curl -sL 'https://osmetadata.astuntechnology.com/geonetwork/srv/api/records/93d4c1f1-7d41-4cae-bf7d-c004e14ed550' -o data.jsonFull json file download — the schema shown was inferred from the file's first records.