SingleFile documents API

openapi: 3.0.0
info:
  title: SingleFile External API Documentation documents API
  description: Formation and compliance documents
  termsOfService: https://www.singlefile.io/
  contact:
    email: support@singlefile.io
  license:
    name: BSD License
  version: v1
  x-apievangelist-provenance:
    method: searched
    source: https://docs.singlefile.ai/ (ReadMe per-operation OpenAPI fragments merged; OAuth2 scheme added from the documented Authentication guide)
    generated: '2026-07-21'
servers:
- url: https://api.demo.singlefile.ai/external-api/v1
security:
- OAuth2ClientCredentials:
  - read
  - write
tags:
- name: documents
  description: Formation and compliance documents
paths:
  /documents/{document_id}:
    parameters:
    - name: document_id
      in: path
      required: true
      schema:
        type: string
    get:
      operationId: documents_read
      description: ''
      responses:
        '200':
          description: ''
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DocumentDetail'
      tags:
      - documents
components:
  schemas:
    DocumentDetail:
      required:
      - document_type
      - filing_type
      type: object
      properties:
        id:
          title: Id
          type: string
          readOnly: true
          nullable: true
        title:
          title: Title
          type: string
          maxLength: 1000
          nullable: true
        entity_name:
          title: Entity name
          type: string
          minLength: 1
          nullable: true
        organization_id:
          title: Organization id
          type: string
          readOnly: true
        entity_id:
          title: Entity id
          type: string
          readOnly: true
        jurisdiction:
          title: Jurisdiction
          type: string
          maxLength: 500
          nullable: true
        document_type:
          title: Document type
          type: string
          minLength: 1
        filing_type:
          title: Filing type
          type: string
          minLength: 1
        certified:
          title: Certified
          description: Check this if this document is a certified copy.
          type: boolean
        created_at:
          title: Created at
          type: string
          format: date-time
        description:
          title: Description
          type: string
          maxLength: 5000
          nullable: true
        document_url:
          title: Document url
          type: string
          format: uri
          readOnly: true
          minLength: 1
        page_length:
          title: Page length
          type: integer
          maximum: 2147483647
          minimum: -2147483648
          nullable: true
        updated_at:
          title: Updated at
          type: string
          format: date-time
  securitySchemes:
    OAuth2ClientCredentials:
      type: oauth2
      description: 'OAuth 2.0 Client Credentials flow. Exchange client_id/client_secret at the token endpoint for a 1-hour bearer token; send it as Authorization: Bearer <token>.'
      flows:
        clientCredentials:
          tokenUrl: https://api.demo.singlefile.ai/o/token/
          scopes:
            read: Read access to entities, organizations, orders, documents, jurisdictions and tasks
            write: Create and update entities, organizations, orders, documents and jurisdictions