Castor website screenshot

Castor

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.

Castor publishes 11 APIs on the APIs.io network, including Audit Trail API, Data Export API, Fields API, and 8 more. Tagged areas include Clinical Trials, Electronic Data Capture, EDC, Clinical Data Management, and Healthcare.

Castor’s developer surface includes authentication, documentation, engineering blog, and 9 more developer resources.

🌐 Visit website 📡 Source on GitHub
39.1/100 thin ▬ flat Agent 34/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessPaidSelf serve
11 APIs
Clinical TrialsElectronic Data CaptureEDCClinical Data ManagementHealthcareLife SciencesResearch

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 39.1/100 · thin
Contract Quality 14.5 / 25
Developer Ergonomics 4.3 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 4.1 / 13
Governance 0.0 / 12
Discoverability 7.4 / 10
Agent readiness — 34/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 7 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/castoredc: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 11

Individual APIs this provider publishes, each with its own machine-readable definition.

Castor Audit Trail API

Immutable audit trail of study changes.

Castor Data Export API

Bulk export of study data, structure, and option groups.

Castor Fields API

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

Castor Institutes API

Institutes (sites / centers) participating in a study.

Castor Metadata API

Reference metadata such as countries.

Castor Participants API

Participants (records / subjects) enrolled in a study.

Castor Reports API

Reports / repeating data and their instances.

Castor Studies API

Studies accessible to the API client.

Castor Study Data Points API

Collected values for study forms.

Castor Surveys API

Surveys, survey packages, and ePRO.

Castor Users API

Users and study membership.

Scroll for all 11

Open Collections 1

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Castor EDC / CDMS API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Castoredc Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Castoredc Rate Limits

3 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Castoredc Finops

FINOPS

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Castoredc Authentication

oauth2 · 1 scheme

SECURITY

Castoredc Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Castoredc Vulnerability Disclosure

security.txt · contact published

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Castoredc Scopes

3 scopes · clientCredentials

3 scopes

SCOPES

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Castoredc Agentic Access

34 operations · 7 acting

34 operations · 7 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Access & Security 4

Authentication, authorization, and security posture

VulnerabilityDisclosure
VulnerabilityDisclosure
 DomainSecurity
DomainSecurity
 Authentication
Authentication
 OAuthScopes
OAuthScopes

Operate 1

Status, limits, changes, and where to get help

RateLimits
RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans
Plans
 FinOps
FinOps

Company 3

The organization behind the API

LinkedIn
LinkedIn
 Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
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.
accessModel:
  pricing: paid
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Paid · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/castoredc.png
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-audit-trail-api
  name: Castor Audit Trail API
  description: Immutable audit trail of study changes.
  humanURL: https://helpdesk.castoredc.com/hc/en-us/articles/27149233860509-Castor-EDC-CDMS-Application-Programming-Interface-API
  baseURL: https://data.castoredc.com/api
  tags:
  - Audit Trail
  properties:
  - type: OpenAPI
    url: openapi/castoredc-audit-trail-api-openapi.yml
  - type: Documentation
    url: https://helpdesk.castoredc.com/hc/en-us/articles/27149233860509-Castor-EDC-CDMS-Application-Programming-Interface-API
  - type: APIReference
    url: https://data.castoredc.com/api
  - type: PostmanCollection
    url: collections/castoredc.postman_collection.json
  - type: OpenCollection
    url: collections/castoredc.opencollection.json
- aid: castoredc:castoredc-data-export-api
  name: Castor Data Export API
  description: Bulk export of study data, structure, and option groups.
  humanURL: https://helpdesk.castoredc.com/hc/en-us/articles/27149233860509-Castor-EDC-CDMS-Application-Programming-Interface-API
  baseURL: https://data.castoredc.com/api
  tags:
  - Data Export
  properties:
  - type: OpenAPI
    url: openapi/castoredc-data-export-api-openapi.yml
  - type: Documentation
    url: https://helpdesk.castoredc.com/hc/en-us/articles/27149233860509-Castor-EDC-CDMS-Application-Programming-Interface-API
  - type: APIReference
    url: https://data.castoredc.com/api
  - type: PostmanCollection
    url: collections/castoredc.postman_collection.json
  - type: OpenCollection
    url: collections/castoredc.opencollection.json
- aid: castoredc:castoredc-fields-api
  name: Castor Fields API
  description: Study fields and their metadata (dependencies, option groups, validations).
  humanURL: https://helpdesk.castoredc.com/hc/en-us/articles/27149233860509-Castor-EDC-CDMS-Application-Programming-Interface-API
  baseURL: https://data.castoredc.com/api
  tags:
  - Fields
  properties:
  - type: OpenAPI
    url: openapi/castoredc-fields-api-openapi.yml
  - type: Documentation
    url: https://helpdesk.castoredc.com/hc/en-us/articles/27149233860509-Castor-EDC-CDMS-Application-Programming-Interface-API
  - type: APIReference
    url: https://data.castoredc.com/api
  - type: PostmanCollection
    url: collections/castoredc.postman_collection.json
  - type: OpenCollection
    url: collections/castoredc.opencollection.json
- aid: castoredc:castoredc-institutes-api
  name: Castor Institutes API
  description: Institutes (sites / centers) participating in a study.
  humanURL: https://helpdesk.castoredc.com/hc/en-us/articles/27149233860509-Castor-EDC-CDMS-Application-Programming-Interface-API
  baseURL: https://data.castoredc.com/api
  tags:
  - Institutes
  properties:
  - type: OpenAPI
    url: openapi/castoredc-institutes-api-openapi.yml
  - type: Documentation
    url: https://helpdesk.castoredc.com/hc/en-us/articles/27149233860509-Castor-EDC-CDMS-Application-Programming-Interface-API
  - type: APIReference
    url: https://data.castoredc.com/api
  - type: PostmanCollection
    url: collections/castoredc.postman_collection.json
  - type: OpenCollection
    url: collections/castoredc.opencollection.json
- aid: castoredc:castoredc-metadata-api
  name: Castor Metadata API
  description: Reference metadata such as countries.
  humanURL: https://helpdesk.castoredc.com/hc/en-us/articles/27149233860509-Castor-EDC-CDMS-Application-Programming-Interface-API
  baseURL: https://data.castoredc.com/api
  tags:
  - Metadata
  properties:
  - type: OpenAPI
    url: openapi/castoredc-metadata-api-openapi.yml
  - type: Documentation
    url: https://helpdesk.castoredc.com/hc/en-us/articles/27149233860509-Castor-EDC-CDMS-Application-Programming-Interface-API
  - type: APIReference
    url: https://data.castoredc.com/api
  - type: PostmanCollection
    url: collections/castoredc.postman_collection.json
  - type: OpenCollection
    url: collections/castoredc.opencollection.json
- aid: castoredc:castoredc-participants-api
  name: Castor Participants API
  description: Participants (records / subjects) enrolled in a study.
  humanURL: https://helpdesk.castoredc.com/hc/en-us/articles/27149233860509-Castor-EDC-CDMS-Application-Programming-Interface-API
  baseURL: https://data.castoredc.com/api
  tags:
  - Participants
  properties:
  - type: OpenAPI
    url: openapi/castoredc-participants-api-openapi.yml
  - type: Documentation
    url: https://helpdesk.castoredc.com/hc/en-us/articles/27149233860509-Castor-EDC-CDMS-Application-Programming-Interface-API
  - type: APIReference
    url: https://data.castoredc.com/api
  - type: PostmanCollection
    url: collections/castoredc.postman_collection.json
  - type: OpenCollection
    url: collections/castoredc.opencollection.json
- aid: castoredc:castoredc-reports-api
  name: Castor Reports API
  description: Reports / repeating data and their instances.
  humanURL: https://helpdesk.castoredc.com/hc/en-us/articles/27149233860509-Castor-EDC-CDMS-Application-Programming-Interface-API
  baseURL: https://data.castoredc.com/api
  tags:
  - Reports
  properties:
  - type: OpenAPI
    url: openapi/castoredc-reports-api-openapi.yml
  - type: Documentation
    url: https://helpdesk.castoredc.com/hc/en-us/articles/27149233860509-Castor-EDC-CDMS-Application-Programming-Interface-API
  - type: APIReference
    url: https://data.castoredc.com/api
  - type: PostmanCollection
    url: collections/castoredc.postman_collection.json
  - type: OpenCollection
    url: collections/castoredc.opencollection.json
- aid: castoredc:castoredc-studies-api
  name: Castor Studies API
  description: Studies accessible to the API client.
  humanURL: https://helpdesk.castoredc.com/hc/en-us/articles/27149233860509-Castor-EDC-CDMS-Application-Programming-Interface-API
  baseURL: https://data.castoredc.com/api
  tags:
  - Studies
  properties:
  - type: OpenAPI
    url: openapi/castoredc-studies-api-openapi.yml
  - type: Documentation
    url: https://helpdesk.castoredc.com/hc/en-us/articles/27149233860509-Castor-EDC-CDMS-Application-Programming-Interface-API
  - type: APIReference
    url: https://data.castoredc.com/api
  - type: PostmanCollection
    url: collections/castoredc.postman_collection.json
  - type: OpenCollection
    url: collections/castoredc.opencollection.json
- aid: castoredc:castoredc-study-data-points-api
  name: Castor Study Data Points API
  description: Collected values for study forms.
  humanURL: https://helpdesk.castoredc.com/hc/en-us/articles/27149233860509-Castor-EDC-CDMS-Application-Programming-Interface-API
  baseURL: https://data.castoredc.com/api
  tags:
  - Study Data Points
  properties:
  - type: OpenAPI
    url: openapi/castoredc-study-data-points-api-openapi.yml
  - type: Documentation
    url: https://helpdesk.castoredc.com/hc/en-us/articles/27149233860509-Castor-EDC-CDMS-Application-Programming-Interface-API
  - type: APIReference
    url: https://data.castoredc.com/api
  - type: PostmanCollection
    url: collections/castoredc.postman_collection.json
  - type: OpenCollection
    url: collections/castoredc.opencollection.json
- aid: castoredc:castoredc-surveys-api
  name: Castor Surveys API
  description: Surveys, survey packages, and ePRO.
  humanURL: https://helpdesk.castoredc.com/hc/en-us/articles/27149233860509-Castor-EDC-CDMS-Application-Programming-Interface-API
  baseURL: https://data.castoredc.com/api
  tags:
  - Surveys
  properties:
  - type: OpenAPI
    url: openapi/castoredc-surveys-api-openapi.yml
  - type: Documentation
    url: https://helpdesk.castoredc.com/hc/en-us/articles/27149233860509-Castor-EDC-CDMS-Application-Programming-Interface-API
  - type: APIReference
    url: https://data.castoredc.com/api
  - type: PostmanCollection
    url: collections/castoredc.postman_collection.json
  - type: OpenCollection
    url: collections/castoredc.opencollection.json
- aid: castoredc:castoredc-users-api
  name: Castor Users API
  description: Users and study membership.
  humanURL: https://helpdesk.castoredc.com/hc/en-us/articles/27149233860509-Castor-EDC-CDMS-Application-Programming-Interface-API
  baseURL: https://data.castoredc.com/api
  tags:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/castoredc-users-api-openapi.yml
  - type: Documentation
    url: https://helpdesk.castoredc.com/hc/en-us/articles/27149233860509-Castor-EDC-CDMS-Application-Programming-Interface-API
  - type: APIReference
    url: https://data.castoredc.com/api
  - type: PostmanCollection
    url: collections/castoredc.postman_collection.json
  - type: OpenCollection
    url: collections/castoredc.opencollection.json
common:
- type: AgenticAccess
  url: agentic-access/castoredc-agentic-access.yml
- 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