Castor

Castor is an AI‑native clinical trial platform that provides an electronic data capture (EDC) system, eCOA/ePRO, eConsent, and data management tools. Their API enables secure OAuth2‑based access to study data, participants, and metadata, helping biopharma, CROs, and academic researchers accelerate clinical research with automated data extraction and compliance features.

Castor is profiled on the APIs.io network. Tagged areas include Health, ClinicalTrials, DataManagement, AI, and EDC.

Castor’s developer surface includes pricing, engineering blog, and 14 more developer resources.

🌐 Visit website 📡 Source on GitHub
14.4/100 emerging Agent 3/100 human only Full breakdown ↓
scored 2026-10-09 · rubric v0.23.0
0 APIs
HealthClinicalTrialsDataManagementAIEDC

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-10-09 · rubric v0.23.0
Composite quality — 14.4/100 · emerging
Contract Quality 0.0 / 21
Developer Ergonomics 0.4 / 17
Access Clarity 5.4 / 17
Operational Transparency 1.7 / 11
Contract Governance 0.0 / 10
Discoverability 4.4 / 9
Regulatory Posture 2.2 / 15
Agent readiness — 3/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
Documented Reversibility 0 / 6
MCP Server 12 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 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
Delegated User Identity 0 / 6
Protected Resource Metadata 0 / 5
Registration Without a Human 0 / 6
Agentic Commerce Well-Known Document 0 / 5
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.
Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.
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/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/castor: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Security Posture 2

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

Castor Domain Security

TLSv1.3 · DMARC

SECURITY

Castor Vulnerability Disclosure

security.txt · contact published

SECURITY

Resources

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt
LLMsTxt
 WellKnown
WellKnown

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 4

Authentication, authorization, and security posture

Security
Security
 SecurityTxt
SecurityTxt
 VulnerabilityDisclosure
VulnerabilityDisclosure
 DomainSecurity
DomainSecurity

Commercial 3

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy
 Pricing
Pricing

Company 3

The organization behind the API

Newsroom
Newsroom
 Blog
Blog
 Website
Website

Other 3

Properties that don't map to a standard resource type

Hosts
Hosts
 Vendors
Vendors
 Leadership
Leadership

Source (apis.yml)

apis.yml Raw ↑ 
aid: castor
name: Castor
image: https://www.castoredc.com/wp-content/uploads/2022/06/home-social2-1024x538.jpeg
description: Castor is an AI‑native clinical trial platform that provides an electronic data capture (EDC) system, eCOA/ePRO,
  eConsent, and data management tools. Their API enables secure OAuth2‑based access to study data, participants, and metadata,
  helping biopharma, CROs, and academic researchers accelerate clinical research with automated data extraction and compliance
  features.
url: https://raw.githubusercontent.com/api-evangelist/castor/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-07 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-07'
modified: '2026-10-07'
tags:
- Health
- ClinicalTrials
- DataManagement
- AI
- EDC
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Security
  url: https://www.castoredc.com/responsible-disclosure-policy
- type: LLMsTxt
  url: llms/castor-llms.txt
- type: SecurityTxt
  url: well-known/castor-security.txt
- type: WellKnown
  url: well-known/castor-well-known.yml
- type: Hosts
  url: hosts/castor-hosts.yml
- type: Vendors
  url: vendors/castor-vendors.yml
- type: TermsOfService
  url: https://www.castoredc.com/terms-of-use/
- type: PrivacyPolicy
  url: https://www.castoredc.com/privacy-policy/
- type: Pricing
  url: https://www.castoredc.com/pricing/
- type: Newsroom
  url: https://www.castoredc.com/news/
- type: Leadership
  url: https://www.castoredc.com/about-us/leadership/
- type: Blog
  url: https://www.castoredc.com/resources/blog/?_gl=1*g3lqof*_gcl_aw*R0NMLjE3NDU4MjczNjUuQ2owS0NRandxODZ3QmhEaUFSSXNBSmh1cGhrWkppVlNrLXU5Q1lsUUlrMWY0ajQ0WU5RODdvQ2V1RzRueTZGWWwzWE9xVzZsVGVWdWgyd2FBbzA4RUFMd193Y0I.*_gcl_au*MTI3NjMyMTQ3LjE3NDcwMzU1NTAuMTMwMDk4MTk3OC4xNzQ3MDU4NTk5LjE3NDcwNTkyMTU.
- type: GitHubOrganization
  url: https://github.com/castoredc
- type: VulnerabilityDisclosure
  url: security/castor-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/castor-domain-security.yml
- type: Website
  url: https://www.castoredc.com/
apis: []
x-coverage:
  state: blocked
  reason: bot-challenge
  method: derived
  generated: '2026-10-07'
  generator: derive-coverage.py (pre-flight evidence)
  detail: the company's own front door answers a browser with an anti-bot challenge, so nothing behind it is reachable by
    any reader
  evidence:
  - url: https://data.castoredc.com/mcp
    status: 403
  - url: https://www.castoredc.com/
    status: 403
  - url: https://www.nasdaqprivatemarket.com/
    status: 200
x-enrichment:
  date: '2026-10-07'
  status: enriched
  artifacts_added: 9
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

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