# Castor Fields API

**Canonical:** https://apis.io/apis/castoredc/castoredc-fields-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 Fields API is one of 11 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 Fields. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and an API reference.

Study fields and their metadata (dependencies, option groups, validations).

## Machine-readable artifacts (5)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/castoredc/refs/heads/main/openapi/castoredc-fields-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 (10)

- [Castor Audit Trail API](https://apis.io/apis/castoredc/castoredc-audit-trail-api/)
- [Castor Data Export API](https://apis.io/apis/castoredc/castoredc-data-export-api/)
- [Castor Institutes API](https://apis.io/apis/castoredc/castoredc-institutes-api/)
- [Castor Metadata API](https://apis.io/apis/castoredc/castoredc-metadata-api/)
- [Castor Participants API](https://apis.io/apis/castoredc/castoredc-participants-api/)
- [Castor Reports API](https://apis.io/apis/castoredc/castoredc-reports-api/)
- [Castor Studies API](https://apis.io/apis/castoredc/castoredc-studies-api/)
- [Castor Study Data Points API](https://apis.io/apis/castoredc/castoredc-study-data-points-api/)
- [Castor Surveys API](https://apis.io/apis/castoredc/castoredc-surveys-api/)
- [Castor Users API](https://apis.io/apis/castoredc/castoredc-users-api/)

## Tags

Fields

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