aid: caplight
name: Caplight
description: >-
  Caplight Technologies is a San Francisco private-markets data and trading platform for institutional
  investors, covering 50,000+ VC-backed private companies with secondary-market pricing, a live
  institutional order book, trade and order history, funding rounds with valuations and participants,
  investor participation, SEC-derived fund marks, COI filings, stock splits, news, company signals and
  comparable-company indices. Its proprietary MarketPrice(TM) estimate is implied from live bids, asks
  and closed secondary trades. Caplight exposes the dataset through a versioned REST API (v1 and v2,
  api_key header auth, documented with a public OpenAPI 3.1.0 definition rendered in Redoc), a hosted
  OAuth-protected MCP server for Claude, and a one-line embeddable widget. Securities are offered
  through Caplight Markets LLC, member FINRA/SIPC.
image: https://www.caplight.com/assets/og/og-image-2026.png
url: https://raw.githubusercontent.com/api-evangelist/caplight/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
specificationVersion: '0.20'
created: '2026-08-09'
modified: '2026-08-09'
tags:
- private-markets
- secondary-market
- market-data
- venture-capital
- company-data
- investor-data
- funding-rounds
- pricing-data
- financial-data
- fintech
- mcp
- agent-native
apis:
- name: Caplight MCP Server
  description: >-
    Hosted, remote MCP server that connects Claude.ai and Claude Desktop to the Caplight dataset. Caplight
    documents 15 tools spanning live MarketPrice quotes and price history, the secondary order book and
    trade history, company profiles, COI filings, SEC-derived fund marks, funding rounds with amounts
    and valuations, investor participation and quarterly market summaries. Added as a custom connector;
    no API key is required — access is authorized with a Caplight account over OAuth 2.1 (authorization
    code + PKCE S256, dynamic client registration), advertised via RFC 8414 and RFC 9728 metadata documents.
  humanURL: https://www.caplight.com/products/mcp
  baseURL: https://platform.caplight.com/mcp
  tags:
  - mcp
  - agent-native
  - private-markets
  - market-data
  - company-data
  properties:
  - type: MCPServer
    url: mcp/caplight-mcp.yml
  - type: MCPServer
    url: https://platform.caplight.com/mcp
  - type: ToolCrosswalk
    url: mcp/caplight-tool-crosswalk.yml
  - type: Documentation
    url: https://www.caplight.com/products/mcp
- aid: caplight:caplight-companies-api
  name: Caplight Companies API
  description: The Companies API from Caplight — 1 operation(s) for companies.
  humanURL: https://platform.caplight.com/api/documentation.html
  baseURL: https://us-central1-caplight-prod.cloudfunctions.net/api/public
  tags:
  - Companies
  properties:
  - type: OpenAPI
    url: openapi/caplight-companies-api-openapi.yml
  - type: Documentation
    url: https://platform.caplight.com/api/documentation.html
  - type: APIReference
    url: https://platform.caplight.com/api/documentation.html
  - type: Authentication
    url: authentication/caplight-authentication.yml
  - type: Conventions
    url: conventions/caplight-conventions.yml
  - type: ErrorCatalog
    url: errors/caplight-problem-types.yml
  - type: DataModel
    url: data-model/caplight-data-model.yml
  - type: Sandbox
    url: sandbox/caplight-sandbox.yml
- aid: caplight:caplight-company-api
  name: Caplight Company API
  description: The Company API from Caplight — 3 operation(s) for company.
  humanURL: https://platform.caplight.com/api/documentation.html
  baseURL: https://us-central1-caplight-prod.cloudfunctions.net/api/public
  tags:
  - Company
  properties:
  - type: OpenAPI
    url: openapi/caplight-company-api-openapi.yml
  - type: Documentation
    url: https://platform.caplight.com/api/documentation.html
  - type: APIReference
    url: https://platform.caplight.com/api/documentation.html
  - type: Authentication
    url: authentication/caplight-authentication.yml
  - type: Conventions
    url: conventions/caplight-conventions.yml
  - type: ErrorCatalog
    url: errors/caplight-problem-types.yml
  - type: DataModel
    url: data-model/caplight-data-model.yml
  - type: Sandbox
    url: sandbox/caplight-sandbox.yml
- aid: caplight:caplight-company-details-api
  name: Caplight Company Details API
  description: >-
    Canonical Company resource: identity (name, legal name, location), descriptions, and the latest LLM-generated
    firmographic tags (sectors / verticals / keywords with attribution).
  humanURL: https://platform.caplight.com/api/documentation.html
  baseURL: https://us-central1-caplight-prod.cloudfunctions.net/api/public
  tags:
  - Company Details
  properties:
  - type: OpenAPI
    url: openapi/caplight-company-details-api-openapi.yml
  - type: Documentation
    url: https://platform.caplight.com/api/documentation.html
  - type: APIReference
    url: https://platform.caplight.com/api/documentation.html
  - type: Authentication
    url: authentication/caplight-authentication.yml
  - type: Conventions
    url: conventions/caplight-conventions.yml
  - type: ErrorCatalog
    url: errors/caplight-problem-types.yml
  - type: DataModel
    url: data-model/caplight-data-model.yml
  - type: Sandbox
    url: sandbox/caplight-sandbox.yml
- aid: caplight:caplight-company-filings-api
  name: Caplight Company Filings API
  description: COI (Certificate of Incorporation) filings and related company documents
  humanURL: https://platform.caplight.com/api/documentation.html
  baseURL: https://us-central1-caplight-prod.cloudfunctions.net/api/public
  tags:
  - Company Filings
  properties:
  - type: OpenAPI
    url: openapi/caplight-company-filings-api-openapi.yml
  - type: Documentation
    url: https://platform.caplight.com/api/documentation.html
  - type: APIReference
    url: https://platform.caplight.com/api/documentation.html
  - type: Authentication
    url: authentication/caplight-authentication.yml
  - type: Conventions
    url: conventions/caplight-conventions.yml
  - type: ErrorCatalog
    url: errors/caplight-problem-types.yml
  - type: DataModel
    url: data-model/caplight-data-model.yml
  - type: Sandbox
    url: sandbox/caplight-sandbox.yml
- aid: caplight:caplight-company-lookup-api
  name: Caplight Company Lookup API
  description: >-
    Resolves company domains, PitchBook IDs and v1 company IDs to v2 company IDs, in batches.
  humanURL: https://platform.caplight.com/api/documentation.html
  baseURL: https://us-central1-caplight-prod.cloudfunctions.net/api/public
  tags:
  - Company Lookup
  properties:
  - type: OpenAPI
    url: openapi/caplight-company-lookup-api-openapi.yml
  - type: Documentation
    url: https://platform.caplight.com/api/documentation.html
  - type: APIReference
    url: https://platform.caplight.com/api/documentation.html
  - type: Authentication
    url: authentication/caplight-authentication.yml
  - type: Conventions
    url: conventions/caplight-conventions.yml
  - type: ErrorCatalog
    url: errors/caplight-problem-types.yml
  - type: DataModel
    url: data-model/caplight-data-model.yml
  - type: Sandbox
    url: sandbox/caplight-sandbox.yml
- aid: caplight:caplight-composite-index-api
  name: Caplight Composite Index API
  description: The Composite Index API from Caplight — 3 operation(s) for composite index.
  humanURL: https://platform.caplight.com/api/documentation.html
  baseURL: https://us-central1-caplight-prod.cloudfunctions.net/api/public
  tags:
  - Composite Index
  properties:
  - type: OpenAPI
    url: openapi/caplight-composite-index-api-openapi.yml
  - type: Documentation
    url: https://platform.caplight.com/api/documentation.html
  - type: APIReference
    url: https://platform.caplight.com/api/documentation.html
  - type: Authentication
    url: authentication/caplight-authentication.yml
  - type: Conventions
    url: conventions/caplight-conventions.yml
  - type: ErrorCatalog
    url: errors/caplight-problem-types.yml
  - type: DataModel
    url: data-model/caplight-data-model.yml
  - type: Sandbox
    url: sandbox/caplight-sandbox.yml
- aid: caplight:caplight-comps-api
  name: Caplight Comps API
  description: >-
    LLM-discovered comparable companies with an overall similarity score, a per-dimension breakdown, a
    classification, and a short rationale.
  humanURL: https://platform.caplight.com/api/documentation.html
  baseURL: https://us-central1-caplight-prod.cloudfunctions.net/api/public
  tags:
  - Comps
  properties:
  - type: OpenAPI
    url: openapi/caplight-comps-api-openapi.yml
  - type: Documentation
    url: https://platform.caplight.com/api/documentation.html
  - type: APIReference
    url: https://platform.caplight.com/api/documentation.html
  - type: Authentication
    url: authentication/caplight-authentication.yml
  - type: Conventions
    url: conventions/caplight-conventions.yml
  - type: ErrorCatalog
    url: errors/caplight-problem-types.yml
  - type: DataModel
    url: data-model/caplight-data-model.yml
  - type: Sandbox
    url: sandbox/caplight-sandbox.yml
- aid: caplight:caplight-fund-marks-api
  name: Caplight Fund Marks API
  description: Mutual fund mark-to-market valuations from SEC filings
  humanURL: https://platform.caplight.com/api/documentation.html
  baseURL: https://us-central1-caplight-prod.cloudfunctions.net/api/public
  tags:
  - Fund Marks
  properties:
  - type: OpenAPI
    url: openapi/caplight-fund-marks-api-openapi.yml
  - type: Documentation
    url: https://platform.caplight.com/api/documentation.html
  - type: APIReference
    url: https://platform.caplight.com/api/documentation.html
  - type: Authentication
    url: authentication/caplight-authentication.yml
  - type: Conventions
    url: conventions/caplight-conventions.yml
  - type: ErrorCatalog
    url: errors/caplight-problem-types.yml
  - type: DataModel
    url: data-model/caplight-data-model.yml
  - type: Sandbox
    url: sandbox/caplight-sandbox.yml
- aid: caplight:caplight-funding-rounds-api
  name: Caplight Funding Rounds API
  description: Funding round data including amounts, valuations, participants, and citations
  humanURL: https://platform.caplight.com/api/documentation.html
  baseURL: https://us-central1-caplight-prod.cloudfunctions.net/api/public
  tags:
  - Funding Rounds
  properties:
  - type: OpenAPI
    url: openapi/caplight-funding-rounds-api-openapi.yml
  - type: Documentation
    url: https://platform.caplight.com/api/documentation.html
  - type: APIReference
    url: https://platform.caplight.com/api/documentation.html
  - type: Authentication
    url: authentication/caplight-authentication.yml
  - type: Conventions
    url: conventions/caplight-conventions.yml
  - type: ErrorCatalog
    url: errors/caplight-problem-types.yml
  - type: DataModel
    url: data-model/caplight-data-model.yml
  - type: Sandbox
    url: sandbox/caplight-sandbox.yml
- aid: caplight:caplight-investors-api
  name: Caplight Investors API
  description: Investor participation data for companies
  humanURL: https://platform.caplight.com/api/documentation.html
  baseURL: https://us-central1-caplight-prod.cloudfunctions.net/api/public
  tags:
  - Investors
  properties:
  - type: OpenAPI
    url: openapi/caplight-investors-api-openapi.yml
  - type: Documentation
    url: https://platform.caplight.com/api/documentation.html
  - type: APIReference
    url: https://platform.caplight.com/api/documentation.html
  - type: Authentication
    url: authentication/caplight-authentication.yml
  - type: Conventions
    url: conventions/caplight-conventions.yml
  - type: ErrorCatalog
    url: errors/caplight-problem-types.yml
  - type: DataModel
    url: data-model/caplight-data-model.yml
  - type: Sandbox
    url: sandbox/caplight-sandbox.yml
- aid: caplight:caplight-live-orderbook-api
  name: Caplight Live Orderbook API
  description: The Live Orderbook API from Caplight — 1 operation(s) for live orderbook.
  humanURL: https://platform.caplight.com/api/documentation.html
  baseURL: https://us-central1-caplight-prod.cloudfunctions.net/api/public
  tags:
  - Live Orderbook
  properties:
  - type: OpenAPI
    url: openapi/caplight-live-orderbook-api-openapi.yml
  - type: Documentation
    url: https://platform.caplight.com/api/documentation.html
  - type: APIReference
    url: https://platform.caplight.com/api/documentation.html
  - type: Authentication
    url: authentication/caplight-authentication.yml
  - type: Conventions
    url: conventions/caplight-conventions.yml
  - type: ErrorCatalog
    url: errors/caplight-problem-types.yml
  - type: DataModel
    url: data-model/caplight-data-model.yml
  - type: Sandbox
    url: sandbox/caplight-sandbox.yml
- aid: caplight:caplight-marketprice-api
  name: Caplight Market Price API
  description: >-
    Caplight's proprietary MarketPrice estimate, calculated using executed trades, company primary rounds,
    bids/offers, fund marks, 409a valuations, and comps performance.
  humanURL: https://platform.caplight.com/api/documentation.html
  baseURL: https://us-central1-caplight-prod.cloudfunctions.net/api/public
  tags:
  - MarketPrice
  properties:
  - type: OpenAPI
    url: openapi/caplight-marketprice-api-openapi.yml
  - type: Documentation
    url: https://platform.caplight.com/api/documentation.html
  - type: APIReference
    url: https://platform.caplight.com/api/documentation.html
  - type: Authentication
    url: authentication/caplight-authentication.yml
  - type: Conventions
    url: conventions/caplight-conventions.yml
  - type: ErrorCatalog
    url: errors/caplight-problem-types.yml
  - type: DataModel
    url: data-model/caplight-data-model.yml
  - type: Sandbox
    url: sandbox/caplight-sandbox.yml
- aid: caplight:caplight-news-api
  name: Caplight News API
  description: Company news articles with sentiment analysis
  humanURL: https://platform.caplight.com/api/documentation.html
  baseURL: https://us-central1-caplight-prod.cloudfunctions.net/api/public
  tags:
  - News
  properties:
  - type: OpenAPI
    url: openapi/caplight-news-api-openapi.yml
  - type: Documentation
    url: https://platform.caplight.com/api/documentation.html
  - type: APIReference
    url: https://platform.caplight.com/api/documentation.html
  - type: Authentication
    url: authentication/caplight-authentication.yml
  - type: Conventions
    url: conventions/caplight-conventions.yml
  - type: ErrorCatalog
    url: errors/caplight-problem-types.yml
  - type: DataModel
    url: data-model/caplight-data-model.yml
  - type: Sandbox
    url: sandbox/caplight-sandbox.yml
- aid: caplight:caplight-order-history-api
  name: Caplight Order History API
  description: The Order History API from Caplight — 1 operation(s) for order history.
  humanURL: https://platform.caplight.com/api/documentation.html
  baseURL: https://us-central1-caplight-prod.cloudfunctions.net/api/public
  tags:
  - Order History
  properties:
  - type: OpenAPI
    url: openapi/caplight-order-history-api-openapi.yml
  - type: Documentation
    url: https://platform.caplight.com/api/documentation.html
  - type: APIReference
    url: https://platform.caplight.com/api/documentation.html
  - type: Authentication
    url: authentication/caplight-authentication.yml
  - type: Conventions
    url: conventions/caplight-conventions.yml
  - type: ErrorCatalog
    url: errors/caplight-problem-types.yml
  - type: DataModel
    url: data-model/caplight-data-model.yml
  - type: Sandbox
    url: sandbox/caplight-sandbox.yml
- aid: caplight:caplight-stock-splits-api
  name: Caplight Stock Splits API
  description: The Stock Splits API from Caplight — 1 operation(s) for stock splits.
  humanURL: https://platform.caplight.com/api/documentation.html
  baseURL: https://us-central1-caplight-prod.cloudfunctions.net/api/public
  tags:
  - Stock Splits
  properties:
  - type: OpenAPI
    url: openapi/caplight-stock-splits-api-openapi.yml
  - type: Documentation
    url: https://platform.caplight.com/api/documentation.html
  - type: APIReference
    url: https://platform.caplight.com/api/documentation.html
  - type: Authentication
    url: authentication/caplight-authentication.yml
  - type: Conventions
    url: conventions/caplight-conventions.yml
  - type: ErrorCatalog
    url: errors/caplight-problem-types.yml
  - type: DataModel
    url: data-model/caplight-data-model.yml
  - type: Sandbox
    url: sandbox/caplight-sandbox.yml
- aid: caplight:caplight-trade-history-api
  name: Caplight Trade History API
  description: The Trade History API from Caplight — 1 operation(s) for trade history.
  humanURL: https://platform.caplight.com/api/documentation.html
  baseURL: https://us-central1-caplight-prod.cloudfunctions.net/api/public
  tags:
  - Trade History
  properties:
  - type: OpenAPI
    url: openapi/caplight-trade-history-api-openapi.yml
  - type: Documentation
    url: https://platform.caplight.com/api/documentation.html
  - type: APIReference
    url: https://platform.caplight.com/api/documentation.html
  - type: Authentication
    url: authentication/caplight-authentication.yml
  - type: Conventions
    url: conventions/caplight-conventions.yml
  - type: ErrorCatalog
    url: errors/caplight-problem-types.yml
  - type: DataModel
    url: data-model/caplight-data-model.yml
  - type: Sandbox
    url: sandbox/caplight-sandbox.yml
common:
- type: Overlay
  url: overlays/caplight-rest-api-overlay.yaml
- type: AgenticAccess
  url: agentic-access/caplight-agentic-access.yml
- type: Website
  url: https://www.caplight.com/
- type: DeveloperPortal
  url: https://platform.caplight.com/
- type: Documentation
  url: https://platform.caplight.com/api/documentation.html
- type: APIReference
  url: https://platform.caplight.com/api/documentation.html
- type: GettingStarted
  url: https://www.caplight.com/products/api
- type: Blog
  url: https://www.caplight.com/insights
- type: SignUp
  url: https://platform.caplight.com/signup
- type: Login
  url: https://platform.caplight.com/signin
- type: TermsOfService
  url: https://www.caplight.com/legal/terms-of-use
- type: PrivacyPolicy
  url: https://www.caplight.com/legal/privacy-policy
- type: ChangeLog
  url: https://www.caplight.com/changelog
- type: ChangeLog
  url: changelog/caplight-changelog.yml
- type: Authentication
  url: authentication/caplight-authentication.yml
- type: Conventions
  url: conventions/caplight-conventions.yml
- type: MCPServer
  url: mcp/caplight-mcp.yml
- type: ToolCrosswalk
  url: mcp/caplight-tool-crosswalk.yml
- type: WellKnown
  url: well-known/caplight-well-known.yml
- type: Conformance
  url: conformance/caplight-conformance.yml
- type: Lifecycle
  url: lifecycle/caplight-lifecycle.yml
- type: ErrorCatalog
  url: errors/caplight-problem-types.yml
- type: DataModel
  url: data-model/caplight-data-model.yml
- type: Sandbox
  url: sandbox/caplight-sandbox.yml
- type: Components
  url: components/caplight-components.yml
- type: DomainSecurity
  url: security/caplight-domain-security.yml
- type: LLMsTxt
  url: llms/caplight-llms.txt
- type: AgentSkill
  url: skills/_index.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-08-09'
  status: enriched
  artifacts_added: 24
  pass: local-v1