Spine Directory Service - LDAP API
Access details of organisations, people and systems registered in the Spine Directory Service (SDS) using our LDAP API.
This API is deprecated
It's still available in production, and still supported, but not open to new integrations.
It will have a reduced service level from 30 June 2027 and will be retired by 30 September 2028.
If you're developing a new integration, use an alternative API.
If you're an existing user, you need to migrate away.
Overview
Use this API to access details from the Spine Directory Service (SDS) relating to:
- organisations - NHS organisations, their sites and departments
- people - healthcare workers who are Spine users, including their organisation and role
- systems registered with Spine
Who can use this API
This API can only be used where there is a legal basis to do so.
It is deprecated and not open to new integrations.
API status
This API is deprecated, meaning:
- it is still available in production
- it is still supported
- it is not open to new integrations
This API will:
- have a reduced service level of gold from 30 June 2027
- have a reduced service level of silver from 30 September 2027
- be retired by 30 September 2028
If you're developing a new integration, use an alternative API.
If you're an existing user, you need to migrate away.
For more details, see Deprecation notice: Spine Directory Service LDAP API.
Service level
This API is a platinum service, meaning it is operational and supported 24 hours a day, 365 days a year.
From 30 September 2027, it will have a reduced service level (level to be confirmed).
For more details, see service levels.
Technology
This API uses Lightweight Directory Access Protocol (LDAP).
Network access
You can access this API via the Health and Social Care Network (HSCN).
It is not available on the internet - but we do have alternative APIs that are available on the internet.
For more details, see Network access for APIs.
Environments and testing
| Environment | Base URL |
|---|---|
| Integration | ldaps://ldap.nis1.national.ncrs.nhs.uk |
| Deployment | ldaps://ldap.vn1.national.ncrs.nhs.uk |
| Production | ldaps://ldap.national.ncrs.nhs.uk |
For more details, see Path to Live environments.
Onboarding
This API is not open to new integrations - if you're developing a new integration, use an alternative API.
Interactions
For a summary of how to interact with this API, see Spine Directory Service (SDS) guidance for developers.
For a full formal specification, see part 5 of the Spine External Interface Specification.
Data scope and quality
For details on what data SDS holds, see Spine Directory Service - data scope and quality.
Additional guidance
For further technical resources, see Spine Directory Service (SDS) guidance for developers.
Last edited: 19 August 2026 11:46 am