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 is listed with 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 📡 Profile data on GitHub

40.7/100 developing ▬ flat Agent 3/100 human only Front door AI 3/6 light saas Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 API

Company Virtual Data RoomDocument SecurityFile Sharing Due Diligence Mergers and Acquisitions Digital Rights Management Compliance Security

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 40.7/100 · developing

Contract Quality 0.0 / 21

Developer Ergonomics 10.9 / 17

Access Clarity 10.3 / 17

Operational Transparency 4.1 / 11

Contract Governance 1.9 / 10

Discoverability 5.6 / 9

Regulatory Posture 4.4 / 15

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

Pagination 5 / 5

Distinct Operations 3 / 3

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) 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/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes

12 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 0.0 — up to +25.0 composite points
Contract Governance scores 18.2 — up to +9.8 composite points
Operational Transparency scores 36.8 — up to +8.2 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/caplinked/apis.yml: open an issue on github.com/api-evangelist/caplinked to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Official SDKs on Packagist, pub.dev and Hex	distribution	28.8	-	1

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

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

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

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
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
- Security
tags_raw:
- 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

Caplinked API — frequently asked questions

Does Caplinked have an API?

Yes. APIs.io lists 1 API from Caplinked, including CapLinked API.

How do I authenticate with the Caplinked API?

Caplinked uses bearer-token authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Caplinked Authentication.

Is the Caplinked API ready for AI agents?

Caplinked has a Kin Score of 40.7 out of 100 (developing) and an Agent Readiness score of 2.5 (human-only), scored by API Evangelist on 2026-10-31.

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