SEC API Filing Stream (WebSocket)

asyncapi: '2.6.0'
id: 'urn:io:sec-api:stream:filings:websocket'
info:
  title: SEC API Filing Stream (WebSocket)
  version: '1.0.0'
  description: |
    AsyncAPI 2.6 description of the SEC API (sec-api.io) **Filing Stream API**,
    a documented public **WebSocket** surface.

    Per https://sec-api.io/docs/stream-api, clients open a raw WebSocket
    connection (not Socket.IO) to `wss://stream.sec-api.io` with their API key
    supplied as the `apiKey` query parameter. Whenever one or more new filings
    are published to SEC EDGAR, the server pushes a single message whose payload
    is a **stringified JSON array** of filing metadata objects, typically within
    a few hundred milliseconds of publication.

    The server sends a WebSocket ping every 25 seconds and expects a pong within
    5 seconds; most WebSocket libraries answer pings automatically.

    This is a genuine server-push WebSocket transport and is distinct from SEC
    API's request/response REST endpoints (Filing Query, Full-Text Search,
    XBRL-to-JSON, Extractor, Insider Trading, Form 13F), which are modeled in the
    companion OpenAPI document at `openapi/sec-api-openapi.yml`.
  contact:
    name: API Evangelist
    email: kin@apievangelist.com
    url: https://apievangelist.com
  license:
    name: API documentation - SEC API Terms of Service
    url: https://sec-api.io/terms-of-service
  x-transport-notes:
    transport: WebSocket
    protocol: wss
    library: raw WebSocket (not Socket.IO)
    direction: server-to-client (push)
    url: 'wss://stream.sec-api.io?apiKey=YOUR_API_KEY'
    keepAlive: server ping every 25s, expects pong within 5s
    payload: stringified JSON array of filing metadata objects
    source: https://sec-api.io/docs/stream-api
defaultContentType: application/json
servers:
  stream:
    url: stream.sec-api.io
    protocol: wss
    description: |
      SEC API real-time Filing Stream WebSocket endpoint. Connect to
      `wss://stream.sec-api.io?apiKey=YOUR_API_KEY`. Authentication is the
      `apiKey` query parameter carrying your sec-api.io API token.
    security:
      - apiKey: []
channels:
  /:
    description: |
      The single WebSocket channel. After the connection is established the
      server pushes a `newFilings` message each time one or more filings are
      published to SEC EDGAR. The client does not send application messages; it
      only receives.
    bindings:
      ws:
        bindingVersion: '0.1.0'
        query:
          type: object
          properties:
            apiKey:
              type: string
              description: Your sec-api.io API token.
          required:
            - apiKey
    subscribe:
      operationId: receiveNewFilings
      summary: Receive newly published EDGAR filings in real time.
      description: |
        Subscribe to the push stream of newly published filings. Each message
        payload is a stringified JSON array; parse it to obtain one or more
        filing metadata objects, each carrying accessionNo, formType, cik,
        ticker, companyName, filedAt, entities, documentFormatFiles, and
        dataFiles.
      message:
        $ref: '#/components/messages/NewFilings'
components:
  securitySchemes:
    apiKey:
      type: httpApiKey
      in: query
      name: apiKey
      description: |
        SEC API token passed as the `apiKey` query parameter on the WebSocket
        connection URL (`wss://stream.sec-api.io?apiKey=YOUR_API_KEY`).
  messages:
    NewFilings:
      name: newFilings
      title: Newly published filings
      summary: |
        One push message emitted when new filings appear on SEC EDGAR. The raw
        payload on the wire is a stringified JSON array; clients must JSON.parse
        it into an array of filing metadata objects.
      contentType: application/json
      payload:
        type: array
        description: Array of filing metadata objects.
        items:
          $ref: '#/components/schemas/Filing'
      examples:
        - name: singleFiling
          summary: A single new 8-K filing pushed to the stream
          payload:
            - accessionNo: '0001193125-26-000123'
              formType: '8-K'
              cik: '320193'
              ticker: 'AAPL'
              companyName: 'Apple Inc.'
              filedAt: '2026-07-11T16:05:22-04:00'
              entities:
                - companyName: 'Apple Inc. (Filer)'
                  cik: '320193'
              documentFormatFiles:
                - type: '8-K'
                  documentUrl: 'https://www.sec.gov/Archives/edgar/data/320193/000119312526000123/d123.htm'
              dataFiles: []
  schemas:
    Filing:
      type: object
      description: Metadata for one filing, as pushed on the stream.
      properties:
        accessionNo:
          type: string
          description: Unique accession number identifying the filing.
        formType:
          type: string
          description: EDGAR form type, e.g. 8-K, 10-K, 4.
        cik:
          type: string
          description: SEC Central Index Key of the primary filer.
        ticker:
          type: string
          description: Trading symbol, when available.
        companyName:
          type: string
          description: Name of the primary filing entity.
        filedAt:
          type: string
          format: date-time
          description: Timestamp the filing was published on EDGAR (ISO 8601).
        entities:
          type: array
          description: Entities associated with the filing.
          items:
            type: object
            additionalProperties: true
        documentFormatFiles:
          type: array
          description: Primary and exhibit documents in the filing.
          items:
            type: object
            additionalProperties: true
        dataFiles:
          type: array
          description: Data files (e.g. XBRL) attached to the filing.
          items:
            type: object
            additionalProperties: true