openapi: 3.0.3
info:
  title: Castor EDC / CDMS Audit Trail Surveys 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: Surveys
  description: Surveys, survey packages, and ePRO.
paths:
  /study/{study_id}/survey:
    get:
      operationId: listSurveys
      tags:
      - Surveys
      summary: List surveys
      description: Lists the survey and ePRO definitions configured in a study.
      x-endpoint-status: confirmed
      parameters:
      - $ref: '#/components/parameters/StudyId'
      responses:
        '200':
          description: A list of surveys.
          content:
            application/json:
              schema:
                type: object
  /study/{study_id}/participant/{participant_id}/data-points/survey-instance:
    get:
      operationId: listSurveyInstances
      tags:
      - Surveys
      summary: List a participant's survey instances
      description: Retrieves the survey instances (and their data points) for a participant.
      x-endpoint-status: confirmed
      parameters:
      - $ref: '#/components/parameters/StudyId'
      - $ref: '#/components/parameters/ParticipantId'
      responses:
        '200':
          description: A list of survey instances.
          content:
            application/json:
              schema:
                type: object
  /study/{study_id}/participant/{participant_id}/data-points/survey-package-instance:
    post:
      operationId: createSurveyPackageInstance
      tags:
      - Surveys
      summary: Send a survey package to a participant
      description: Creates a survey-package instance, sending one or more surveys to a participant (for example, by email invitation).
      x-endpoint-status: confirmed
      parameters:
      - $ref: '#/components/parameters/StudyId'
      - $ref: '#/components/parameters/ParticipantId'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                survey_package_id:
                  type: string
                email_address:
                  type: string
      responses:
        '201':
          description: The created survey-package instance.
          content:
            application/json:
              schema:
                type: object
  /study/{study_id}/compliance:
    post:
      operationId: getSurveyCompliance
      tags:
      - Surveys
      summary: Retrieve participant survey compliance
      description: Returns survey compliance information for participants in a study.
      x-endpoint-status: confirmed
      parameters:
      - $ref: '#/components/parameters/StudyId'
      responses:
        '200':
          description: Survey compliance information.
          content:
            application/json:
              schema:
                type: object
components:
  parameters:
    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
  securitySchemes:
    oauth2ClientCredentials:
      type: oauth2
      flows:
        clientCredentials:
          tokenUrl: https://data.castoredc.com/api/oauth/token
          scopes: {}