# OpenClinica Authentication API

**Canonical:** https://apis.io/apis/openclinica/openclinica-authentication-api/  
**Provider:** OpenClinica — https://apis.io/providers/openclinica/  
**Base URL:** https://{subdomain}.build.openclinica.io/user-service/api  
**Documentation:** https://docs.openclinica.com/oc4/how-and-when-to-use-apis/

OpenClinica Authentication API is one of 6 APIs that [OpenClinica](https://apis.io/providers/openclinica/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Authentication. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and an API reference.

OAuth 2.0 token acquisition.

## Machine-readable artifacts (13)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/openclinica/refs/heads/main/openapi/openclinica-authentication-api-openapi.yml
- **Documentation** — https://docs.openclinica.com/oc4/how-and-when-to-use-apis/
- **APIReference** — https://docs.openclinica.com/3-1-technical-documents/rest-api-specifications/rest-api-specifications-oauth-and-openclinica/
- **Documentation** — https://docs.openclinica.com/oc4/how-and-when-to-use-apis/oc4-openclinica-4-technical-documentation-participants-add/
- **APIReference** — https://docs.openclinica.com/oc4/how-and-when-to-use-apis/oc4-openclinica-4-technical-documentation-participants-get-participants-study-level-or-site-level/
- **PostmanCollection** — https://raw.githubusercontent.com/api-evangelist/openclinica/refs/heads/main/collections/openclinica.postman_collection.json
- **OpenCollection** — https://raw.githubusercontent.com/api-evangelist/openclinica/refs/heads/main/collections/openclinica.opencollection.json
- **Documentation** — https://docs.openclinica.com/oc4/how-and-when-to-use-apis/oc4-openclinica-4-technical-documentation-events-create-and-update-single-study-event/
- **Documentation** — https://docs.openclinica.com/oc4/how-and-when-to-use-apis/oc4-clinicaldata-import-crf-data/
- **Documentation** — https://docs.openclinica.com/3-1-technical-documents/rest-api-specifications/rest-api-specifications-read-openclinica-odm-metadata-rest-service/
- **APIReference** — https://docs.openclinica.com/3-1-technical-documents/rest-api-specifications/openclinica-restful-urls/
- **Documentation** — https://docs.openclinica.com/oc4/how-and-when-to-use-apis/oc4-participantsbulk-add-bulk-list-participant-ids/
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/openclinica/refs/heads/main/apis.yml

## Other OpenClinica APIs (5)

- [OpenClinica Bulk Operations API](https://apis.io/apis/openclinica/openclinica-bulk-operations-api/)
- [OpenClinica Clinical Data API](https://apis.io/apis/openclinica/openclinica-clinical-data-api/)
- [OpenClinica Metadata API](https://apis.io/apis/openclinica/openclinica-metadata-api/)
- [OpenClinica Participants API](https://apis.io/apis/openclinica/openclinica-participants-api/)
- [OpenClinica Study Events API](https://apis.io/apis/openclinica/openclinica-study-events-api/)

## Tags

Authentication

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/openclinica/openclinica-authentication-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/openclinica/.