Caplinked website screenshot

Caplinked

CapLinked is a secure virtual data room (VDR) provider used for M&A, fundraising, due diligence, audits, and other confidential document workflows. The CapLinked API is a RESTful, JSON API secured by HMAC-SHA256 request signing (TLS + signed requests) that lets developers embed CapLinked's information-security controls into their own applications: protect and encrypt files in secure cloud storage, configure Access Control List (ACL) privileges, apply enterprise Digital Rights Management (DRM) to Microsoft Office and PDF files, generate dynamic watermarks, produce exhaustive activity and audit-trail reports, and run OCR-backed search over stored files. The API models an Organization > Team > Workspace hierarchy containing Folders, Files, Groups, Permissions, Activities, Uploads, Downloads, and Watermarks, and ships official SDKs for Node.js, Ruby, PHP, C#/.NET, and Python. It supports search, pagination, and filtering.

Caplinked publishes 1 API on the APIs.io network. Tagged areas include Company, Virtual Data Room, Document Security, File Sharing, and Due Diligence.

Caplinked’s developer surface includes documentation, getting-started guide, signup flow, engineering blog, pricing, support, changelog, and 22 more developer resources.

🌐 Visit website 📡 Source on GitHub
29.9/100 thin ▬ flat Agent 3/100 human only Front door AI 3/6 light saas Full breakdown ↓
scored 2026-09-19 · rubric v0.22.0
1 APIs
CompanyVirtual Data RoomDocument SecurityFile SharingDue DiligenceMergers and AcquisitionsDigital Rights ManagementComplianceData RoomSecurity

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-19 · rubric v0.22.0
Composite quality — 29.9/100 · thin
Contract Quality 0.0 / 25
Developer Ergonomics 11.4 / 20
Access Clarity 4.2 / 20
Operational Transparency 4.4 / 13
Contract Governance 2.2 / 12
Discoverability 7.6 / 10
Agent readiness — 3/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 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 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
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.
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/caplinked: 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 →

APIs 1

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

CapLinked API

RESTful JSON API for CapLinked virtual data rooms, secured by HMAC-SHA256 request signing. Manage organizations, teams, workspaces, folders, files, groups, permissions, uploads,...

Security Posture 3

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

Caplinked Authentication

apiKey · 1 scheme

SECURITY

Caplinked Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Caplinked Trust Center

SOC 2, ISO 27001, HIPAA, HITECH, PCI SAQ-D, FISMA, EU-U.S. Privacy Shield

SECURITY

Resources

Get Started 5

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted
 SignUp
SignUp
 Login
Login
 Sandbox
Sandbox

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

X-MCPServerCandidate
X-MCPServerCandidate
 LLMsTxt
LLMsTxt

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Conventions
Conventions
 DataModel
DataModel
 Lifecycle
Lifecycle
 Conformance
Conformance

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 Packages
Packages
 SDKs
SDKs

Access & Security 4

Authentication, authorization, and security posture

TrustCenter
TrustCenter
 DomainSecurity
DomainSecurity
 Compliance
Compliance
 Authentication
Authentication

Operate 4

Status, limits, changes, and where to get help

Support
Support
 StatusPage
StatusPage
 ChangeLog
ChangeLog
 ChangeLog
ChangeLog

Commercial 3

Pricing, plans, and the legal terms of use

Pricing
Pricing
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 3

The organization behind the API

Website
Website
 Blog
Blog
 BlogRSS
BlogRSS

Source (apis.yml)

apis.yml Raw ↑ 
aid: caplinked
name: Caplinked
description: 'CapLinked is a secure virtual data room (VDR) provider used for M&A, fundraising, due diligence, audits, and
  other confidential document workflows. The CapLinked API is a RESTful, JSON API secured by HMAC-SHA256 request signing (TLS
  + signed requests) that lets developers embed CapLinked''s information-security controls into their own applications: protect
  and encrypt files in secure cloud storage, configure Access Control List (ACL) privileges, apply enterprise Digital Rights
  Management (DRM) to Microsoft Office and PDF files, generate dynamic watermarks, produce exhaustive activity and audit-trail
  reports, and run OCR-backed search over stored files. The API models an Organization > Team > Workspace hierarchy containing
  Folders, Files, Groups, Permissions, Activities, Uploads, Downloads, and Watermarks, and ships official SDKs for Node.js,
  Ruby, PHP, C#/.NET, and Python. It supports search, pagination, and filtering.'
url: https://raw.githubusercontent.com/api-evangelist/caplinked/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
x-tier: stub
x-tier-reason: portfolio-lead
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  - sandbox
  generated: '2026-09-03'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-18'
image: https://www.caplinked.com/wp-content/uploads/2022/03/Caplinked-Logo-299x80-e1541700266853.png
tags:
- Company
- Virtual Data Room
- Document Security
- File Sharing
- Due Diligence
- Mergers and Acquisitions
- Digital Rights Management
- Compliance
- Data Room
- Security
apis:
- name: CapLinked API
  description: RESTful JSON API for CapLinked virtual data rooms, secured by HMAC-SHA256 request signing. Manage organizations,
    teams, workspaces, folders, files, groups, permissions, uploads, downloads, watermarks, and activity/audit reporting.
  humanURL: https://developer.caplinked.com/docs
  baseURL: https://sandbox.caplinked.com/api/v1/
  tags:
  - Virtual Data Room
  - Document Security
  - File Sharing
  properties:
  - type: Documentation
    url: https://developer.caplinked.com/docs
  - type: GettingStarted
    url: https://developer.caplinked.com/getting-started
  - type: Glossary
    url: https://developer.caplinked.com/glossary
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: TrustCenter
  url: security/caplinked-trust-center.yml
- type: DomainSecurity
  url: security/caplinked-domain-security.yml
- type: Website
  url: https://caplinked.com
- type: DeveloperPortal
  url: https://developer.caplinked.com/
- type: Documentation
  url: https://developer.caplinked.com/docs
- type: GettingStarted
  url: https://developer.caplinked.com/getting-started
- type: SignUp
  url: https://developer.caplinked.com/signup
- type: Login
  url: https://developer.caplinked.com/login
- type: GitHubOrganization
  url: https://github.com/caplinked
- type: Blog
  url: https://www.caplinked.com/blog/
- type: BlogRSS
  url: https://www.caplinked.com/feed/
- type: Pricing
  url: https://www.caplinked.com/pricing/
- type: Support
  url: https://www.caplinked.com/contact/
- type: TermsOfService
  url: https://www.caplinked.com/company/terms-of-service/
- type: PrivacyPolicy
  url: https://www.caplinked.com/company/privacy-policy/
- type: StatusPage
  url: https://status.caplinked.com/
- type: Compliance
  url: https://www.caplinked.com/security/
- type: ChangeLog
  url: https://developer.caplinked.com/api-changelog
- type: ChangeLog
  name: CapLinked API changelog (structured)
  url: changelog/caplinked-changelog.yml
- type: Packages
  url: packages/caplinked-packages.yml
- type: SDKs
  url: packages/caplinked-packages.yml
- type: Authentication
  url: authentication/caplinked-authentication.yml
- type: Conventions
  url: conventions/caplinked-conventions.yml
- type: DataModel
  url: data-model/caplinked-data-model.yml
- type: Sandbox
  url: sandbox/caplinked-sandbox.yml
- type: Lifecycle
  url: lifecycle/caplinked-lifecycle.yml
- type: Conformance
  url: conformance/caplinked-conformance.yml
- type: X-MCPServerCandidate
  url: mcp/caplinked-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: LLMsTxt
  url: llms/caplinked-llms.txt
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

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