Caplight

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.

Caplight publishes 16 APIs on the APIs.io network, including Companies API, Company API, Company Details API, and 13 more. Tagged areas include Private Markets, Secondary Market, Market Data, Venture Capital, and Company Data.

Caplight’s developer surface includes documentation, API reference, getting-started guide, engineering blog, signup flow, changelog, authentication, and 21 more developer resources.

🌐 Visit website 📡 Source on GitHub

39.8/100 developing ▬ flat Agent 62/100 agent native saas Full breakdown ↓
scored 2026-09-04 · rubric v0.18.3

AccessSelf serve

1 APIs 2 MCP Servers

Private Markets Secondary Market Market Data Venture Capital Company Data investor-data Funding Rounds Pricing Data Financial Data Fintech MCP agent-native

Kin Score

Kin Score How this is scored →
scored 2026-09-04 · rubric v0.18.3

Composite quality — 39.8/100 · developing

Contract Quality 11.5 / 21

Developer Ergonomics 8.8 / 17

Access Clarity 4.7 / 17

Operational Transparency 1.7 / 11

Contract Governance 0.5 / 10

Discoverability 5.8 / 9

Regulatory Posture 6.3 / 15

Agent readiness — 62/100 · agent native

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 4 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Securities & Market Data 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.

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/.

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/caplight: 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 17

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

Open Collections 17

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

MCP Servers 2

Model Context Protocol servers that expose these APIs to AI agents.

AGENTIC

Resources

Get Started 5

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Login

Sandbox

Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

MCPServer

WellKnown

LLMsTxt

AgentSkill

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

Conformance

Lifecycle

ErrorCatalog

DataModel

Components

Build 1

SDKs, sample code, and the tooling you integrate with

ToolCrosswalk

ToolCrosswalk

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

ChangeLog

ChangeLog

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

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.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  - security
  - sandbox
  generated: '2026-09-02'
  method: derived
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: '0.23'
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
tags_raw:
- 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
  tags_raw:
  - 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

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/caplight"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/caplight/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/caplight/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

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A second provider on the same verified email joins the account you already have.