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

39.3/100 developing ▬ flat Agent 32/100 agent aware Full breakdown ↓
scored 2026-08-21 · rubric v0.12.0

AccessPaidSelf serve

11 APIs

Clinical Trials Electronic Data Capture EDC Clinical Data Management Healthcare Life Sciences Research

Kin Score

Kin Score How this is scored →
scored 2026-08-21 · rubric v0.12.0

Composite quality — 39.3/100 · developing

Contract Quality 11.2 / 21

Developer Ergonomics 2.4 / 17

Access Clarity 6.7 / 17

Operational Transparency 3.5 / 11

Contract Governance 0.0 / 10

Discoverability 6.3 / 9

Regulatory Posture 6.6 / 15

Agent readiness — 32/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

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

Regulatory Posture applies to this provider. Its tags matched the Health regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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.

Open Collections 13

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

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.

Scopes 1

OAuth scopes governing access to this provider's APIs.

Castoredc Scopes

3 scopes · clientCredentials

3 scopes

SCOPES

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

Website

Website

Blog

Blog

Source (apis.yml)

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: '0.23'
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:
  - User
  tags_raw:
  - 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

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