# Castor Study User API

**Canonical:** https://apis.io/apis/castoredc/castoredc-study-user-api/  
**Provider:** Castor — https://apis.io/providers/castoredc/  
**Base URL:** https://data.castoredc.com/api  
**Documentation:** https://helpdesk.castoredc.com/hc/en-us/articles/27149233860509-Castor-EDC-CDMS-Application-Programming-Interface-API

Castor Study User API is one of 45 APIs that [Castor](https://apis.io/providers/castoredc/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include study-user. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and an API reference.

The study-user API from Castor — 2 operation(s) for study-user.

## Operations (5)

| Method | Path | Summary |
|---|---|---|
| GET | `/study/{study_id}/user` | Retrieve a list of users who have access to the study, including their assigned… |
| POST | `/study/{study_id}/user` | Add a user to the study |
| GET | `/study/{study_id}/user/{user_id}` | Retrieve a single user, including their assigned roles per site |
| PUT | `/study/{study_id}/user/{user_id}` | Replace a single user's role assignments |
| DELETE | `/study/{study_id}/user/{user_id}` | Removes a user from the study |

## Machine-readable artifacts (5)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/castoredc/refs/heads/main/openapi/castoredc-study-user-api-openapi.yml
- **Documentation** — https://helpdesk.castoredc.com/hc/en-us/articles/27149233860509-Castor-EDC-CDMS-Application-Programming-Interface-API
- **APIReference** — https://data.castoredc.com/api
- **PostmanCollection** — https://raw.githubusercontent.com/api-evangelist/castoredc/refs/heads/main/collections/castoredc.postman_collection.json
- **OpenCollection** — https://raw.githubusercontent.com/api-evangelist/castoredc/refs/heads/main/collections/castoredc.opencollection.json

## Other Castor APIs (12)

- [Castor Metadata API](https://apis.io/apis/castoredc/castoredc-metadata-api/)
- [Castor Beta API](https://apis.io/apis/castoredc/castoredc-beta-api/)
- [Castor Castor Internal API](https://apis.io/apis/castoredc/castoredc-castor-internal-api/)
- [Castor Country API](https://apis.io/apis/castoredc/castoredc-country-api/)
- [Castor Data Point Collection API](https://apis.io/apis/castoredc/castoredc-data-point-collection-api/)
- [Castor Data Points API](https://apis.io/apis/castoredc/castoredc-data-points-api/)
- [Castor Export API](https://apis.io/apis/castoredc/castoredc-export-api/)
- [Castor Field API](https://apis.io/apis/castoredc/castoredc-field-api/)
- [Castor Field Dependency API](https://apis.io/apis/castoredc/castoredc-field-dependency-api/)
- [Castor Field Optiongroup API](https://apis.io/apis/castoredc/castoredc-field-optiongroup-api/)
- [Castor Field Validation API](https://apis.io/apis/castoredc/castoredc-field-validation-api/)
- [Castor Form API](https://apis.io/apis/castoredc/castoredc-form-api/)

## Tags

study-user

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