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

39.6/100 thin Agent 21/100 agent aware Full breakdown ↓
scored 2026-07-20 · rubric v0.4

1 APIs 1 MCP Servers 0 Features

CompanyVirtual Data RoomDocument SecurityFile SharingDue DiligenceMergers and AcquisitionsDigital Rights ManagementComplianceData RoomSecurity

API Rating

API Evangelist Rating How this is scored →
scored 2026-07-20 · rubric v0.4

Composite quality — 39.6/100 · thin

Contract Quality 0.0 / 25

Developer Ergonomics 13.5 / 20

Commercial Clarity 12.1 / 20

Operational Transparency 4.8 / 13

Governance 0.0 / 12

Discoverability 9.3 / 10

Agent readiness — 21/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

MCP Server 12 / 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

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/caplinked: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Get Started 5

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

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

MCPServer

MCPServer

LLMsTxt

LLMsTxt

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Conventions

DataModel

Lifecycle

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

DomainSecurity

Compliance

Authentication

Operate 4

Status, limits, changes, and where to get help

Support

StatusPage

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)

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
specificationVersion: '0.20'
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: MCPServer
  url: mcp/caplinked-mcp.yml
- 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