aid: castoredc
url: https://raw.githubusercontent.com/api-evangelist/castoredc/refs/heads/main/apis.yml
name: Castor
kind: company
description: Castor (Castor EDC / CDMS) is a cloud electronic data capture (EDC) and
  clinical data management platform for clinical trials and real-world research. Its
  RESTful API at https://data.castoredc.com/api 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, audit trail, and batch data export - authenticated with
  OAuth2 client-credentials. The API is used to integrate Castor with external
  systems, automate data entry and extraction, and support statistical analysis via
  the official R and Python wrapper packages.
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- Clinical Trials
- Electronic Data Capture
- EDC
- Clinical Data Management
- Healthcare
- Life Sciences
- Research
created: '2026-07-05'
modified: '2026-07-05'
specificationVersion: '0.19'
apis:
- aid: castoredc:castoredc-studies-api
  name: Castor Studies API
  tags:
  - Studies
  - Metadata
  - Configuration
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://helpdesk.castoredc.com/hc/en-us/articles/27149233860509-Castor-EDC-CDMS-Application-Programming-Interface-API
  baseURL: https://data.castoredc.com/api
  properties:
  - url: https://helpdesk.castoredc.com/hc/en-us/articles/27149233860509-Castor-EDC-CDMS-Application-Programming-Interface-API
    type: Documentation
  - url: https://data.castoredc.com/api
    type: APIReference
  - url: openapi/castoredc-openapi.yml
    type: OpenAPI
  - url: collections/castoredc.postman_collection.json
    type: PostmanCollection
  - url: collections/castoredc.opencollection.json
    type: OpenCollection
  description: List the studies your API client can access and retrieve a single
    study's configuration and metadata. A study is the top-level container in Castor;
    its GUID (the study_id) is required by nearly every other endpoint.
- aid: castoredc:castoredc-participants-api
  name: Castor Participants (Records) API
  tags:
  - Participants
  - Records
  - Subjects
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://data.castoredc.com/api
  baseURL: https://data.castoredc.com/api
  properties:
  - url: https://data.castoredc.com/api
    type: APIReference
  - url: openapi/castoredc-openapi.yml
    type: OpenAPI
  - url: collections/castoredc.postman_collection.json
    type: PostmanCollection
  - url: collections/castoredc.opencollection.json
    type: OpenCollection
  description: Create, list, and retrieve participants (records / subjects) enrolled
    in a study, including their institute assignment, randomization status, progress,
    and lifecycle. Participants are the entities that data points are collected
    against.
- aid: castoredc:castoredc-institutes-api
  name: Castor Institutes API
  tags:
  - Institutes
  - Sites
  - Multi-Center
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://data.castoredc.com/api
  baseURL: https://data.castoredc.com/api
  properties:
  - url: https://data.castoredc.com/api
    type: APIReference
  - url: openapi/castoredc-openapi.yml
    type: OpenAPI
  - url: collections/castoredc.postman_collection.json
    type: PostmanCollection
  - url: collections/castoredc.opencollection.json
    type: OpenCollection
  description: List and retrieve the institutes (sites / centers) participating in a
    study, and create new institutes. Institutes group participants for multi-center
    trials and drive site-level access control and reporting.
- aid: castoredc:castoredc-users-api
  name: Castor Users API
  tags:
  - Users
  - Access
  - Membership
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://data.castoredc.com/api
  baseURL: https://data.castoredc.com/api
  properties:
  - url: https://data.castoredc.com/api
    type: APIReference
  - url: openapi/castoredc-openapi.yml
    type: OpenAPI
  - url: collections/castoredc.postman_collection.json
    type: PostmanCollection
  - url: collections/castoredc.opencollection.json
    type: OpenCollection
  description: List the users the authenticated account can see, retrieve a single
    user, and list the users who are members of a given study. Used to reconcile
    study membership and site staff with external identity and CTMS systems.
- aid: castoredc:castoredc-fields-api
  name: Castor Fields API
  tags:
  - Fields
  - Field Metadata
  - Option Groups
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://data.castoredc.com/api
  baseURL: https://data.castoredc.com/api
  properties:
  - url: https://data.castoredc.com/api
    type: APIReference
  - url: openapi/castoredc-openapi.yml
    type: OpenAPI
  - url: collections/castoredc.postman_collection.json
    type: PostmanCollection
  - url: collections/castoredc.opencollection.json
    type: OpenCollection
  description: Retrieve the data-capture fields that define a study's forms, plus
    their supporting metadata - field dependencies (conditional logic), option
    groups (answer choices), and field validations. This is the schema you need to
    interpret and write study data points correctly.
- aid: castoredc:castoredc-study-data-points-api
  name: Castor Study Data Points API
  tags:
  - Data Points
  - Data Entry
  - Data Extraction
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://data.castoredc.com/api
  baseURL: https://data.castoredc.com/api
  properties:
  - url: https://data.castoredc.com/api
    type: APIReference
  - url: openapi/castoredc-openapi.yml
    type: OpenAPI
  - url: collections/castoredc.postman_collection.json
    type: PostmanCollection
  - url: collections/castoredc.opencollection.json
    type: OpenCollection
  description: Read and write the actual collected values (data points) for the study
    forms of a participant - retrieve all study data points for a study or a single
    participant, and create or update participant study data points programmatically.
- aid: castoredc:castoredc-reports-api
  name: Castor Reports (Repeating Data) API
  tags:
  - Reports
  - Repeating Data
  - Instances
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://data.castoredc.com/api
  baseURL: https://data.castoredc.com/api
  properties:
  - url: https://data.castoredc.com/api
    type: APIReference
  - url: openapi/castoredc-openapi.yml
    type: OpenAPI
  - url: collections/castoredc.postman_collection.json
    type: PostmanCollection
  - url: collections/castoredc.opencollection.json
    type: OpenCollection
  description: Work with reports (now called repeating data) - unscheduled or
    repeatable forms such as adverse events or medications. List report definitions,
    list and create repeating-data instances for a participant, and read or write
    their data points.
- aid: castoredc:castoredc-surveys-api
  name: Castor Surveys API
  tags:
  - Surveys
  - ePRO
  - Survey Packages
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://data.castoredc.com/api
  baseURL: https://data.castoredc.com/api
  properties:
  - url: https://data.castoredc.com/api
    type: APIReference
  - url: openapi/castoredc-openapi.yml
    type: OpenAPI
  - url: collections/castoredc.postman_collection.json
    type: PostmanCollection
  - url: collections/castoredc.opencollection.json
    type: OpenCollection
  description: Manage surveys and electronic patient-reported outcomes (ePRO) - list
    survey definitions, send survey packages to participants (creating survey-package
    instances), check survey compliance, and read survey data points and instances.
- aid: castoredc:castoredc-audit-trail-api
  name: Castor Audit Trail API
  tags:
  - Audit Trail
  - Compliance
  - GCP
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://data.castoredc.com/api
  baseURL: https://data.castoredc.com/api
  properties:
  - url: https://data.castoredc.com/api
    type: APIReference
  - url: openapi/castoredc-openapi.yml
    type: OpenAPI
  - url: collections/castoredc.postman_collection.json
    type: PostmanCollection
  - url: collections/castoredc.opencollection.json
    type: OpenCollection
  description: Retrieve the immutable audit trail for a study - the who, what, and
    when of every data and configuration change - to support GCP/21 CFR Part 11
    compliance, monitoring, and reconciliation with external quality systems.
- aid: castoredc:castoredc-data-export-api
  name: Castor Data Export API
  tags:
  - Export
  - Bulk Data
  - Structure
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://data.castoredc.com/api
  baseURL: https://data.castoredc.com/api
  properties:
  - url: https://data.castoredc.com/api
    type: APIReference
  - url: openapi/castoredc-openapi.yml
    type: OpenAPI
  - url: collections/castoredc.postman_collection.json
    type: PostmanCollection
  - url: collections/castoredc.opencollection.json
    type: OpenCollection
  description: Request and download bulk exports of a study - the collected data, the
    study structure, and the option groups - for downstream statistical analysis,
    archiving, and data warehousing.
common:
- type: VulnerabilityDisclosure
  url: security/castoredc-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/castoredc-domain-security.yml
- type: Authentication
  url: authentication/castoredc-authentication.yml
- type: OAuthScopes
  url: scopes/castoredc-scopes.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/castoredc
- type: Website
  url: https://www.castoredc.com
- type: Documentation
  url: https://helpdesk.castoredc.com/application-programming-interface-api
- type: Plans
  url: plans/castoredc-plans-pricing.yml
- type: RateLimits
  url: rate-limits/castoredc-rate-limits.yml
- type: FinOps
  url: finops/castoredc-finops.yml
- url: https://www.castoredc.com/blog/
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com