Caplight

Caplight Funding Rounds API

Funding round data including amounts, valuations, participants, and citations

Documentation GitHub OpenAPI

Operations 3

GET /v2/companies/{companyId}/funding-rounds Get company funding rounds #

GET /v2/funding-rounds/updates Get funding round updates #

GET /v2/funding-rounds/{roundId} Get funding round by ID #

Work with this as data

Every API 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 apis

7 MCP tools reach this

find_apisBrowse and filter every API in the catalog.
get_api_artifactsOne API's artifacts, grouped by type.
get_openapiThe primary OpenAPI for this API.
find_similar_apisAPIs that look like this one.
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 API

curl "https://apis.io/api/v1/apis/caplight:caplight-funding-rounds-api"

All apis

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

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

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

OpenAPI Specification

openapi: 3.2.0
info:
  version: 2.0.0
  title: Caplight REST Funding Rounds API
  description: This page provides documentation for the Caplight API, a paid add-on product of Caplight Data.
  termsOfService: https://platform.caplight.com/terms
  contact:
    name: 'Contact: Caplight Engineering'
    email: engineering@caplight.com
  x-logo:
    url: https://storage.googleapis.com/caplight-prod.appspot.com/caplight-logos/api-logo.png
    altText: Caplight logo
servers:
- url: //us-central1-caplight-prod.cloudfunctions.net/api/public
  description: Production
- url: //us-central1-caplight-staging.cloudfunctions.net/api/public
  description: Staging/Sandbox
tags:
- name: Funding Rounds
  description: Funding round data including amounts, valuations, participants, and citations
paths:
  /v2/companies/{companyId}/funding-rounds:
    get:
      tags:
      - Funding Rounds
      summary: Get company funding rounds
      description: Returns a paginated, sortable list of funding rounds for a company. Results are sorted by `roundDate` ascending by default.
      parameters:
      - name: companyId
        in: path
        description: 'Company identifier: v2 company ID, v1 company ID, PitchBook ID (e.g. 41339-53), or company domain (e.g. clickhouse.com). A domain can match more than one company, in which case the best match is used; call `GET /v2/companies` to see every candidate. Access control and the annual distinct-company limit apply the same way however the company is identified.'
        required: true
        schema:
          type: string
      - name: pageNumber
        in: query
        description: Page number (1-based). First page is 1.
        required: false
        schema:
          type: integer
          default: 1
        example: 1
      - name: pageSize
        in: query
        description: Number of results per page (default 50, max 200)
        required: false
        schema:
          type: integer
          default: 50
          minimum: 1
          maximum: 200
        example: 50
      - name: sortBy
        in: query
        description: 'Field to sort results by. `roundDate` sorts by the best available date for the round, using the first non-null value from: completedAt, the round''s internal date, then announcedAt. `updatedAt` sorts by the last update timestamp. Rounds with a null sort value are placed at the end regardless of sort order.'
        required: false
        schema:
          type: string
          enum:
          - roundDate
          - updatedAt
          default: roundDate
        example: roundDate
      - name: sortOrder
        in: query
        description: 'Sort direction: `asc` for ascending (oldest first), `desc` for descending (newest first).'
        required: false
        schema:
          type: string
          enum:
          - asc
          - desc
          default: asc
        example: asc
      responses:
        '200':
          description: Successful operation
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/FundingRoundsResponse'
              example:
                fundingRounds:
                - id: a1b2c3d4-e5f6-7890-abcd-ef1234567890
                  company:
                    id: b2c3d4e5-f6a7-8901-bcde-f12345678901
                    name: Acme Inc
                    domain: acme.com
                    pitchbookId: 41339-53
                    caplightIds:
                      v2Id: b2c3d4e5-f6a7-8901-bcde-f12345678901
                      v1Id: abc123xyz
                  status: completed
                  isDeleted: false
                  announcedAt: '2024-03-15'
                  completedAt: '2024-06-01'
                  roundName: Series B
                  amounts:
                    total:
                      amount: 50000000
                      currency: USD
                      amountUsd: 50000000
                    equity:
                      amount: 50000000
                      currency: USD
                      amountUsd: 50000000
                    debt:
                      amount: null
                      currency: USD
                      amountUsd: null
                  valuation:
                    preMoney:
                      amount: 200000000
                      currency: USD
                      amountUsd: 200000000
                    postMoney:
                      amount: 250000000
                      currency: USD
                      amountUsd: 250000000
                  pps:
                    amount: 12.5
                    currency: USD
                    amountUsd: 12.5
                  participants:
                  - id: f1a2b3c4-d5e6-7890-abcd-111111111111
                    investor:
                      id: 11111111-aaaa-bbbb-cccc-111111111111
                      type: firm
                      name: Sequoia Capital
                    role: lead
                  - id: f1a2b3c4-d5e6-7890-abcd-222222222222
                    investor:
                      id: 22222222-aaaa-bbbb-cccc-222222222222
                      type: firm
                      name: a16z
                    role: participant
                  citations:
                  - id: c1a2b3c4-d5e6-7890-abcd-333333333333
                    type: press_release
                    url: https://example.com/press
                    sourceName: Company Blog
                    publishedAt: '2024-06-01'
                  updatedAt: '2024-06-15T14:30:00.000Z'
                - id: d4e5f6a7-b8c9-0123-def0-456789abcdef
                  company:
                    id: e5f6a7b8-c9d0-1234-ef01-56789abcdef0
                    name: Beta Corp
                    domain: betacorp.io
                    pitchbookId: null
                    caplightIds:
                      v2Id: e5f6a7b8-c9d0-1234-ef01-56789abcdef0
                      v1Id: null
                  status: announced
                  isDeleted: false
                  announcedAt: '2024-07-01'
                  completedAt: null
                  roundName: Series C
                  restricted:
                    fields:
                    - amounts
                    - valuation
                    - participants
                  updatedAt: '2024-07-05T11:00:00.000Z'
                pagination:
                  pageNumber: 1
                  numPages: 3
                  totalRecords: 12
      operationId: getV2CompaniesByCompanyIdFundingRounds
      x-operation-id-source: derived
  /v2/funding-rounds/updates:
    get:
      tags:
      - Funding Rounds
      summary: Get funding round updates
      description: 'Returns funding rounds that have been updated within a date range. Use this for sync/incremental ingestion. Only returns rounds for companies your account has access to.


        **Window:** Rounds are returned where `updatedSince < updated_at <= upTo` (updatedSince is exclusive, upTo is inclusive).


        **Ordering:** Results are ordered by `updated_at` ascending, then `id` ascending.


        **Pagination:** For the first request, omit `upTo` or set it to bound your query. The response includes an `upTo` value. For pages 2 through N of the same batch, pass that same `upTo` as the `upTo` query param so pagination stays consistent.


        **Checkpointing:** After fetching all pages for a batch, advance your checkpoint by setting the next request''s `updatedSince` to the `upTo` value from the previous response.


        **Deleted rounds:** Rounds deleted within the query range are included with `isDeleted: true`.'
      parameters:
      - name: updatedSince
        in: query
        description: ISO 8601 date — exclusive lower bound. Return rounds with updated_at strictly after this time. Use the previous response's upTo to checkpoint for the next batch.
        required: true
        schema:
          type: string
          format: date-time
        example: '2024-01-01T00:00:00.000Z'
      - name: upTo
        in: query
        description: ISO 8601 date — inclusive upper bound. Return rounds with updated_at <= this time. Omit for first request (defaults to now). For pages 2..N, reuse the upTo value from the first page response.
        required: false
        schema:
          type: string
          format: date-time
      - name: pageNumber
        in: query
        description: Page number (1-based). First page is 1.
        required: false
        schema:
          type: integer
          default: 1
        example: 1
      - name: pageSize
        in: query
        description: Number of results per page (default 50, max 200)
        required: false
        schema:
          type: integer
          default: 50
          minimum: 1
          maximum: 200
        example: 50
      responses:
        '200':
          description: Successful operation
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/FundingRoundUpdatesResponse'
              example:
                updatedSince: '2024-06-01T00:00:00.000Z'
                upTo: '2024-06-15T23:59:59.999Z'
                fundingRounds:
                - id: a1b2c3d4-e5f6-7890-abcd-ef1234567890
                  company:
                    id: b2c3d4e5-f6a7-8901-bcde-f12345678901
                    name: Acme Inc
                    domain: acme.com
                    pitchbookId: 41339-53
                    caplightIds:
                      v2Id: b2c3d4e5-f6a7-8901-bcde-f12345678901
                      v1Id: abc123xyz
                  status: completed
                  isDeleted: false
                  announcedAt: '2024-03-15'
                  completedAt: '2024-06-01'
                  roundName: Series B
                  amounts:
                    total:
                      amount: 50000000
                      currency: USD
                      amountUsd: 50000000
                    equity:
                      amount: 50000000
                      currency: USD
                      amountUsd: 50000000
                    debt:
                      amount: null
                      currency: USD
                      amountUsd: null
                  valuation:
                    preMoney:
                      amount: 200000000
                      currency: USD
                      amountUsd: 200000000
                    postMoney:
                      amount: 250000000
                      currency: USD
                      amountUsd: 250000000
                  pps:
                    amount: 12.5
                    currency: USD
                    amountUsd: 12.5
                  participants:
                  - id: f1a2b3c4-d5e6-7890-abcd-111111111111
                    investor:
                      id: 11111111-aaaa-bbbb-cccc-111111111111
                      type: firm
                      name: Sequoia Capital
                    role: lead
                  citations: []
                  updatedAt: '2024-06-10T09:00:00.000Z'
                pagination:
                  pageNumber: 1
                  numPages: 1
                  totalRecords: 1
        '400':
          description: Invalid date parameters (e.g. missing or invalid updatedSince)
      operationId: getV2FundingRoundsUpdates
      x-operation-id-source: derived
  /v2/funding-rounds/{roundId}:
    get:
      tags:
      - Funding Rounds
      summary: Get funding round by ID
      description: Returns a single funding round by its round ID. Returns 404 if the round is not accessible to your account.
      parameters:
      - name: roundId
        in: path
        description: Round ID
        required: true
        schema:
          type: string
          format: uuid
      responses:
        '200':
          description: Successful operation
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/FundingRoundSnapshot'
              example:
                id: a1b2c3d4-e5f6-7890-abcd-ef1234567890
                company:
                  id: b2c3d4e5-f6a7-8901-bcde-f12345678901
                  name: Acme Inc
                  domain: acme.com
                  pitchbookId: 41339-53
                  caplightIds:
                    v2Id: b2c3d4e5-f6a7-8901-bcde-f12345678901
                    v1Id: abc123xyz
                status: completed
                isDeleted: false
                announcedAt: '2024-03-15'
                completedAt: '2024-06-01'
                roundName: Series B
                amounts:
                  total:
                    amount: 50000000
                    currency: USD
                    amountUsd: 50000000
                  equity:
                    amount: 50000000
                    currency: USD
                    amountUsd: 50000000
                  debt:
                    amount: null
                    currency: USD
                    amountUsd: null
                valuation:
                  preMoney:
                    amount: 200000000
                    currency: USD
                    amountUsd: 200000000
                  postMoney:
                    amount: 250000000
                    currency: USD
                    amountUsd: 250000000
                pps:
                  amount: 12.5
                  currency: USD
                  amountUsd: 12.5
                participants:
                - id: f1a2b3c4-d5e6-7890-abcd-111111111111
                  investor:
                    id: 11111111-aaaa-bbbb-cccc-111111111111
                    type: firm
                    name: Sequoia Capital
                  role: lead
                - id: f1a2b3c4-d5e6-7890-abcd-222222222222
                  investor:
                    id: 22222222-aaaa-bbbb-cccc-222222222222
                    type: firm
                    name: Andreessen Horowitz
                  role: participant
                - id: f1a2b3c4-d5e6-7890-abcd-444444444444
                  investor:
                    id: 44444444-aaaa-bbbb-cccc-444444444444
                    type: individual
                    name: Jane Smith
                  role: participant
                citations:
                - id: c1a2b3c4-d5e6-7890-abcd-555555555555
                  type: press_release
                  url: https://acme.com/series-b
                  sourceName: Acme Blog
                  publishedAt: '2024-06-01'
                - id: c1a2b3c4-d5e6-7890-abcd-666666666666
                  type: sec_filing
                  url: null
                  sourceName: Form D
                  publishedAt: '2024-06-15'
                updatedAt: '2024-06-15T14:30:00.000Z'
        '404':
          description: Funding round not found or not accessible
      operationId: getV2FundingRoundsByRoundId
      x-operation-id-source: derived
components:
  schemas:
    PublicInvestorSummary:
      type: object
      properties:
        id:
          type: string
          description: Investor ID
        type:
          type: string
          enum:
          - firm
          - individual
        name:
          type: string
          description: Investor display name
    Pagination:
      type: object
      properties:
        pageNumber:
          type: integer
          description: Page number (1-based). First page is 1.
          example: 1
        numPages:
          type: integer
          description: Total number of pages for the result set
          example: 10
        totalRecords:
          type: integer
          description: Total number of records for the result set
          example: 250
    FundingRoundCitation:
      type: object
      properties:
        id:
          type: string
        type:
          type: string
          enum:
          - url
          - coi
          - press_release
          - sec_filing
          - news
          - other
        url:
          type: string
          nullable: true
        sourceName:
          type: string
          nullable: true
        publishedAt:
          type: string
          nullable: true
    FundingRoundsResponse:
      type: object
      properties:
        fundingRounds:
          type: array
          items:
            $ref: '#/components/schemas/FundingRoundSnapshot'
        pagination:
          $ref: '#/components/schemas/Pagination'
    FundingRoundSnapshot:
      type: object
      description: Funding round with amounts, valuation, participants, and citations
      properties:
        id:
          type: string
          description: Round ID
        company:
          $ref: '#/components/schemas/PublicCompanySummary'
        status:
          type: string
          enum:
          - announced
          - completed
          - cancelled
          - rumored
          - postponed
        isDeleted:
          type: boolean
          description: Soft-deleted flag
        announcedAt:
          type: string
          nullable: true
          description: Announcement date (YYYY-MM-DD)
        completedAt:
          type: string
          nullable: true
          description: Completion date (YYYY-MM-DD)
        roundName:
          type: string
          description: Round name as recorded, e.g. "Series C" or "Debt"
        amounts:
          type: object
          description: Funding amounts broken down by total, equity, and debt
          properties:
            total:
              $ref: '#/components/schemas/MoneyAmount'
              description: Total funding amount
            equity:
              $ref: '#/components/schemas/MoneyAmount'
              description: Equity component
            debt:
              $ref: '#/components/schemas/MoneyAmount'
              description: Debt component
        valuation:
          type: object
          description: Round valuation
          properties:
            preMoney:
              $ref: '#/components/schemas/MoneyAmount'
              description: Pre-money valuation
            postMoney:
              $ref: '#/components/schemas/MoneyAmount'
              description: Post-money valuation
        pps:
          $ref: '#/components/schemas/MoneyAmount'
          description: Average price per share
        participants:
          type: array
          items:
            $ref: '#/components/schemas/FundingRoundParticipant'
        citations:
          type: array
          items:
            $ref: '#/components/schemas/FundingRoundCitation'
        restricted:
          $ref: '#/components/schemas/ApiRestrictedFields'
        updatedAt:
          type: string
          format: date-time
          description: Last update timestamp
    ApiRestrictedFields:
      type: object
      description: Present when one or more fields are omitted due to account field-level restrictions. The fields array lists omitted field names (e.g. amounts, valuation, pps, participants, citations). Always check for this object and handle missing fields in your integration.
      properties:
        fields:
          type: array
          items:
            type: string
          description: Names of fields omitted from the response due to account permissions
    FundingRoundParticipant:
      type: object
      properties:
        id:
          type: string
          description: Participation record ID
        investor:
          $ref: '#/components/schemas/PublicInvestorSummary'
        role:
          type: string
          enum:
          - lead
          - participant
          - unknown
          description: Investor role in the round
    PublicCompanySummary:
      type: object
      description: Company summary. Companies have two IDs — v1 and v2 — both provided in caplightIds for cross-referencing across API versions.
      properties:
        id:
          type: string
          description: v2 company ID
        name:
          type: string
          description: Company name
        domain:
          type: string
          nullable: true
          description: Company website domain
        pitchbookId:
          type: string
          nullable: true
          description: Pitchbook company ID
        caplightIds:
          type: object
          description: Both company ID formats for cross-referencing v1 and v2 endpoints
          properties:
            v2Id:
              type: string
              description: v2 company ID (same as id)
            v1Id:
              type: string
              nullable: true
              description: v1 company ID (for v1 API endpoints)
    MoneyAmount:
      type: object
      description: A monetary value with original currency and USD equivalent
      properties:
        amount:
          type: number
          nullable: true
          description: Amount in the original currency
        currency:
          type: string
          description: ISO 4217 currency code (e.g. USD, EUR)
        amountUsd:
          type: number
          nullable: true
          description: Amount converted to USD
    FundingRoundUpdatesResponse:
      type: object
      properties:
        updatedSince:
          type: string
          description: Exclusive lower bound used for this query
        upTo:
          type: string
          description: Inclusive upper bound used for this query. Reuse this value as up_to when fetching pages 2..N; use as updated_since for the next batch after completing all pages.
        fundingRounds:
          type: array
          items:
            $ref: '#/components/schemas/FundingRoundSnapshot'
        pagination:
          $ref: '#/components/schemas/Pagination'
  securitySchemes:
    api_key:
      description: Caplight API authentication is managed through an api_key header value. Please contact us if you do not yet have an API key.
      type: apiKey
      name: api_key
      in: header
x-tagGroups:
- name: V1
  tags:
  - Company
  - Companies
  - MarketPrice
  - Live Orderbook
  - Trade History
  - Order History
  - Company Filings
  - Stock Splits
  - Fund Marks
  - News
  - company_model
  - order_model
  - market_price_model
  - trade_model
  - 409a_valuation_model
  - fund_mark_model
  - comp_model
  - stock_split_model
  - coi_model
- name: V2
  tags:
  - Funding Rounds
  - Investors
  - Company Lookup
  - Company Details
  - Comps
x-provenance:
  method: harvested
  publisher: Caplight
  source: https://us-central1-caplight-prod.cloudfunctions.net/api/v2/spec
  note: split by refine-openapis from the provider's own published document, verified by fetch (openapi/_original/*.fetch.json);
    stamped by stamp-openapi-provenance.py (roadmap#793)