# Caplight

**Canonical:** https://apis.io/providers/caplight/  
**Website:** https://www.caplight.com/  
**APIs profiled:** 17

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.

## Kin Score — 46.2 / 100 (developing)

Scored 2026-08-12 under rubric 0.11.0. Trend: flat (+0.0 from 46.2).

| Facet | Score |
|---|---|
| Discoverability | 92.6 |
| Contract Quality | 57.9 |
| Governance | 11.5 |
| Operational Transparency | 15.8 |
| Developer Ergonomics | 64.7 |
| Commercial Clarity | 34.2 |

Regulatory layer — **Securities & Market Data**: 41.7 (matched via tags).

## Agent readiness — 52.9 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| MCP Server | yes |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | verified |
| OpenAPI Examples | verified |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## APIs (17)

- **Caplight MCP Server** — 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...
- **Caplight Companies API** — The Companies API from Caplight — 1 operation(s) for companies.
- **Caplight Company API** — The Company API from Caplight — 3 operation(s) for company.
- **Caplight Company Details API** — Canonical Company resource: identity (name, legal name, location), descriptions, and the latest LLM-generated firmographic tags (sectors / verticals / keywords with attribution).
- **Caplight Company Filings API** — COI (Certificate of Incorporation) filings and related company documents
- **Caplight Company Lookup API** — Resolves company domains, PitchBook IDs and v1 company IDs to v2 company IDs, in batches.
- **Caplight Composite Index API** — The Composite Index API from Caplight — 3 operation(s) for composite index.
- **Caplight Comps API** — LLM-discovered comparable companies with an overall similarity score, a per-dimension breakdown, a classification, and a short rationale.
- **Caplight Fund Marks API** — Mutual fund mark-to-market valuations from SEC filings
- **Caplight Funding Rounds API** — Funding round data including amounts, valuations, participants, and citations
- **Caplight Investors API** — Investor participation data for companies
- **Caplight Live Orderbook API** — The Live Orderbook API from Caplight — 1 operation(s) for live orderbook.
- **Caplight Market Price API** — Caplight's proprietary MarketPrice estimate, calculated using executed trades, company primary rounds, bids/offers, fund marks, 409a valuations, and comps performance.
- **Caplight News API** — Company news articles with sentiment analysis
- **Caplight Order History API** — The Order History API from Caplight — 1 operation(s) for order history.
- **Caplight Stock Splits API** — The Stock Splits API from Caplight — 1 operation(s) for stock splits.
- **Caplight Trade History API** — The Trade History API from Caplight — 1 operation(s) for trade history.

## MCP servers (2)

- **caplight-mcp.yml**
- **mcp**

## Agentic access (1)

- **Caplight Agentic Access** — 26 operations

## Security (2)

- **Caplight Authentication** — apiKey/oauth2 · 2 schemes
- **Caplight Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Tags

private-markets, secondary-market, market-data, venture-capital, company-data, investor-data, funding-rounds, pricing-data, financial-data, fintech, mcp, agent-native

---

Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/caplight/). Scores are computed from the provider's own public artifacts under a published rubric.