openapi: 3.0.3
info:
  title: Castor EDC / CDMS Audit Trail Study Data Points API
  description: 'The Castor EDC / CDMS API is a RESTful interface to Castor''s cloud electronic data capture (EDC) and clinical data management platform. It exposes study configuration and collected data - studies, participants (records), institutes (sites), users, fields and field metadata, study data points, repeating data (reports), surveys and survey packages, the audit trail, and batch data export. Authentication is OAuth2 with the Client Credentials flow: request an access token from POST /oauth/token using an API Client ID and Client Secret generated in Castor User Settings, then send it as a Bearer token. Access tokens are valid for 5 hours. Most identifiers (study, field, report / repeating-data instance, survey package instance) are uppercase GUIDs in 8-4-4-4-12 format; the participant ID is the exception.


    Endpoint status: paths that this document marks with `x-endpoint-status: confirmed` were observed directly in Castor''s published API reference and helpdesk documentation. Paths marked `x-endpoint-status: modeled` reflect the documented resource model and the coverage of the official R and Python wrapper packages, but the exact path or shape was inferred and should be verified against https://data.castoredc.com/api during reconciliation.'
  version: '1.0'
  contact:
    name: Castor
    url: https://www.castoredc.com
  license:
    name: Proprietary
    url: https://www.castoredc.com/legal/
servers:
- url: https://data.castoredc.com/api
  description: Castor EU (default)
- url: https://us.castoredc.com/api
  description: Castor US region
security:
- oauth2ClientCredentials: []
tags:
- name: Study Data Points
  description: Collected values for study forms.
paths:
  /study/{study_id}/data-points/study:
    get:
      operationId: listStudyDataPoints
      tags:
      - Study Data Points
      summary: List all study data points
      description: Retrieves all study-form data points collected across a study.
      x-endpoint-status: confirmed
      parameters:
      - $ref: '#/components/parameters/StudyId'
      - $ref: '#/components/parameters/Page'
      responses:
        '200':
          description: A paginated list of study data points.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DataPointCollection'
  /study/{study_id}/participant/{participant_id}/data-points/study:
    get:
      operationId: listParticipantStudyDataPoints
      tags:
      - Study Data Points
      summary: List a participant's study data points
      description: Retrieves the study-form data points for a single participant.
      x-endpoint-status: confirmed
      parameters:
      - $ref: '#/components/parameters/StudyId'
      - $ref: '#/components/parameters/ParticipantId'
      responses:
        '200':
          description: A list of study data points.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DataPointCollection'
    post:
      operationId: updateParticipantStudyDataPoints
      tags:
      - Study Data Points
      summary: Create or update a participant's study data points
      description: Creates or updates study-form data points for a single participant. Accepts a batch of field_id / value pairs.
      x-endpoint-status: confirmed
      parameters:
      - $ref: '#/components/parameters/StudyId'
      - $ref: '#/components/parameters/ParticipantId'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/DataPointWriteRequest'
      responses:
        '200':
          description: The updated data points.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DataPointCollection'
components:
  parameters:
    Page:
      name: page
      in: query
      required: false
      description: Page number for paginated (HAL) collections.
      schema:
        type: integer
        minimum: 1
    ParticipantId:
      name: participant_id
      in: path
      required: true
      description: The participant (record) ID.
      schema:
        type: string
    StudyId:
      name: study_id
      in: path
      required: true
      description: The study GUID (uppercase, 8-4-4-4-12 format).
      schema:
        type: string
  schemas:
    DataPointWriteRequest:
      type: object
      required:
      - data
      properties:
        common:
          type: object
          properties:
            change_reason:
              type: string
        data:
          type: array
          items:
            type: object
            properties:
              field_id:
                type: string
                format: uuid
              field_value:
                type: string
    DataPointCollection:
      type: object
      properties:
        _embedded:
          type: object
          properties:
            items:
              type: array
              items:
                $ref: '#/components/schemas/DataPoint'
        page_count:
          type: integer
        total_items:
          type: integer
    DataPoint:
      type: object
      properties:
        field_id:
          type: string
          format: uuid
        field_value:
          type: string
        participant_id:
          type: string
        updated_on:
          type: string
          format: date-time
  securitySchemes:
    oauth2ClientCredentials:
      type: oauth2
      flows:
        clientCredentials:
          tokenUrl: https://data.castoredc.com/api/oauth/token
          scopes: {}