> ## Documentation Index
> Fetch the complete documentation index at: https://docs.usecroma.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Delaware Entity by File Number

> Look up one Delaware business entity by its file number and return the Division of Corporations' free record: name, incorporation or formation date, entity kind and type, residency, state of formation and the registered agent. `found: false` when the Division has no entity under that number. Live from the Division; not a statement of good standing.



## OpenAPI

````yaml /api-reference/openapi.json post /us/delaware/entity/v1
openapi: 3.1.0
info:
  title: Croma Marketplace API
  version: 1.0.0
  description: >-
    Government-data APIs for Colombia, Peru, Mexico, and global web search.
    Croma normalizes public-sector data into structured JSON for product teams
    and AI agents.


    Every operation is a POST with a JSON body and an organization API key as a
    bearer token; every operation is an idempotent lookup and accepts an
    optional `Idempotency-Key` header. Paths carry their major version (`/v1`);
    the versioning and deprecation policy, including the `Deprecation` and
    `Sunset` headers a retiring endpoint sends, is at
    https://docs.usecroma.com/versioning. Rate limits are per organization and
    reported on every response (`RateLimit-Policy`, `X-RateLimit-*`):
    https://docs.usecroma.com/rate-limits.
  termsOfService: https://usecroma.com/en/terms
  contact:
    name: Croma support
    url: https://usecroma.com/en/support
    email: tomas@usecroma.com
servers:
  - url: https://api.croma.run
security: []
paths:
  /us/delaware/entity/v1:
    post:
      tags:
        - United States
        - Delaware Division of Corporations
      summary: Delaware Entity by File Number
      description: >-
        Look up one Delaware business entity by its file number and return the
        Division of Corporations' free record: name, incorporation or formation
        date, entity kind and type, residency, state of formation and the
        registered agent. `found: false` when the Division has no entity under
        that number. Live from the Division; not a statement of good standing.
      operationId: delaware_entity
      parameters:
        - $ref: '#/components/parameters/IdempotencyKey'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
                - file_number
              properties:
                file_number:
                  type: string
                  pattern: ^\d{1,9}$
                  description: >-
                    Número de archivo (file number) de la entidad en Delaware,
                    p. ej. `3582691`.
              additionalProperties: false
            example:
              file_number: '3582691'
      responses:
        '200':
          description: Successful response
          headers:
            X-Request-Id:
              $ref: '#/components/headers/X-Request-Id'
            RateLimit-Policy:
              $ref: '#/components/headers/RateLimit-Policy'
            Idempotency-Key:
              $ref: '#/components/headers/Idempotency-Key'
            Deprecation:
              $ref: '#/components/headers/Deprecation'
            Sunset:
              $ref: '#/components/headers/Sunset'
            X-RateLimit-Limit:
              $ref: '#/components/headers/X-RateLimit-Limit'
            X-RateLimit-Remaining:
              $ref: '#/components/headers/X-RateLimit-Remaining'
            X-RateLimit-Reset:
              $ref: '#/components/headers/X-RateLimit-Reset'
            X-Cache:
              $ref: '#/components/headers/X-Cache'
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DelawareEntityResponse'
        '400':
          description: Invalid request body
          headers:
            X-Request-Id:
              $ref: '#/components/headers/X-Request-Id'
            RateLimit-Policy:
              $ref: '#/components/headers/RateLimit-Policy'
            Idempotency-Key:
              $ref: '#/components/headers/Idempotency-Key'
            Deprecation:
              $ref: '#/components/headers/Deprecation'
            Sunset:
              $ref: '#/components/headers/Sunset'
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiError'
        '401':
          description: Missing or invalid API key
          headers:
            X-Request-Id:
              $ref: '#/components/headers/X-Request-Id'
            RateLimit-Policy:
              $ref: '#/components/headers/RateLimit-Policy'
            Idempotency-Key:
              $ref: '#/components/headers/Idempotency-Key'
            Deprecation:
              $ref: '#/components/headers/Deprecation'
            Sunset:
              $ref: '#/components/headers/Sunset'
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiError'
        '429':
          description: Rate limit exceeded
          headers:
            X-Request-Id:
              $ref: '#/components/headers/X-Request-Id'
            RateLimit-Policy:
              $ref: '#/components/headers/RateLimit-Policy'
            Idempotency-Key:
              $ref: '#/components/headers/Idempotency-Key'
            Deprecation:
              $ref: '#/components/headers/Deprecation'
            Sunset:
              $ref: '#/components/headers/Sunset'
            X-RateLimit-Limit:
              $ref: '#/components/headers/X-RateLimit-Limit'
            X-RateLimit-Remaining:
              $ref: '#/components/headers/X-RateLimit-Remaining'
            X-RateLimit-Reset:
              $ref: '#/components/headers/X-RateLimit-Reset'
            Retry-After:
              $ref: '#/components/headers/Retry-After'
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiError'
        '500':
          description: Internal error
          headers:
            X-Request-Id:
              $ref: '#/components/headers/X-Request-Id'
            RateLimit-Policy:
              $ref: '#/components/headers/RateLimit-Policy'
            Idempotency-Key:
              $ref: '#/components/headers/Idempotency-Key'
            Deprecation:
              $ref: '#/components/headers/Deprecation'
            Sunset:
              $ref: '#/components/headers/Sunset'
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiError'
        '502':
          description: Upstream source returned an error
          headers:
            X-Request-Id:
              $ref: '#/components/headers/X-Request-Id'
            RateLimit-Policy:
              $ref: '#/components/headers/RateLimit-Policy'
            Idempotency-Key:
              $ref: '#/components/headers/Idempotency-Key'
            Deprecation:
              $ref: '#/components/headers/Deprecation'
            Sunset:
              $ref: '#/components/headers/Sunset'
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiError'
      security:
        - bearerAuth: []
      externalDocs:
        description: Interactive documentation and examples
        url: https://docs.usecroma.com/guides/united-states/delaware
components:
  parameters:
    IdempotencyKey:
      name: Idempotency-Key
      in: header
      required: false
      description: >-
        Optional client-chosen key for this request (any string up to 255
        characters, e.g. a UUID). Every Croma operation is an idempotent lookup:
        repeating a request with the same body returns the same result and
        creates nothing, so retrying after a timeout or network failure is
        always safe. The key is echoed back in the `Idempotency-Key` response
        header so you can correlate a retry with its first attempt. Each attempt
        that reaches the API counts against the rate limit.
      schema:
        type: string
        maxLength: 255
        example: 0f8e9a42-6b7c-4d1e-9a3f-2c5d7e8f9a0b
  headers:
    X-Request-Id:
      description: Unique id for the request (req_…). Include it in support reports.
      schema:
        type: string
    RateLimit-Policy:
      description: >-
        Quota policy for this endpoint as an IETF RateLimit-Policy structured
        field, e.g. `"default";q=100;w=86400` (100 requests per 86400-second
        window per organization). Endpoints with an extra hourly ceiling list
        both policies, e.g. `"webSearch";q=10;w=3600, "default";q=100;w=86400`.
        Present on every response, including 401 and 429.
      schema:
        type: string
        example: '"default";q=100;w=86400'
    Idempotency-Key:
      description: >-
        The `Idempotency-Key` the request carried, echoed back unchanged. Absent
        when the request sent none.
      schema:
        type: string
    Deprecation:
      description: >-
        Present only on an endpoint version scheduled for removal: the date the
        deprecation took effect (RFC 9745). A `Sunset` header and a `Link` with
        `rel="successor-version"` accompany it. Policy:
        https://docs.usecroma.com/versioning
      schema:
        type: string
        example: '@1767225600'
    Sunset:
      description: >-
        Present only on an endpoint version scheduled for removal: the date
        after which it answers 410 (RFC 8594). Announced in the changelog at
        least 90 days ahead.
      schema:
        type: string
        format: date-time
        example: Wed, 01 Apr 2026 00:00:00 GMT
    X-RateLimit-Limit:
      description: Requests allowed in the current window.
      schema:
        type: integer
    X-RateLimit-Remaining:
      description: Requests left before you are throttled.
      schema:
        type: integer
    X-RateLimit-Reset:
      description: ISO 8601 timestamp when the window resets.
      schema:
        type: string
        format: date-time
    X-Cache:
      description: HIT or MISS. Cached hits still count against your quota.
      schema:
        type: string
        enum:
          - HIT
          - MISS
    Retry-After:
      description: Seconds to wait before retrying.
      schema:
        type: integer
  schemas:
    DelawareEntityResponse:
      type: object
      required:
        - data
      properties:
        data:
          $ref: '#/components/schemas/DelawareEntityData'
    ApiError:
      type: object
      required:
        - error
      properties:
        error:
          type: object
          required:
            - type
            - code
            - message
          properties:
            type:
              type: string
              description: >-
                Broad category: invalid_request_error, authentication_error,
                not_found_error, rate_limit_error, upstream_error, api_error.
            code:
              type: string
              description: Machine-readable specific code.
            message:
              type: string
              description: Human-readable explanation, safe to surface in UI.
            param:
              type: string
              description: Field that triggered the error. Present on validation errors.
            details:
              type: object
              description: Free-form structured detail.
    DelawareEntityData:
      type: object
      properties:
        found:
          type: boolean
          description: false when the Division has no entity under this file number.
        file_number:
          type: string
          description: The queried file number, echoed back.
        entity:
          anyOf:
            - type: object
              properties:
                file_number:
                  type: string
                  description: The Division's file number, the entity's key.
                name:
                  type: string
                  description: The entity's name as registered.
                filed_on:
                  anyOf:
                    - type: string
                    - type: 'null'
                  description: >-
                    `yyyy-mm-dd` the Division prints as the incorporation or
                    formation date.
                entity_kind:
                  anyOf:
                    - type: string
                    - type: 'null'
                  description: >-
                    As the Division classifies it: `Corporation`, `Limited
                    Liability Company`, `Limited Partnership`, `Statutory
                    Trust`, `Partnership`, `Registered Series`, ...
                entity_type:
                  anyOf:
                    - type: string
                    - type: 'null'
                  description: >-
                    The Division's sub-type: `General`, `Bank`, `Benefit
                    Corporation`, `Closed Corp`, `Exempt`, `Series`, ...
                residency:
                  anyOf:
                    - type: string
                      enum:
                        - domestic
                        - foreign
                    - type: 'null'
                  description: >-
                    `domestic` when formed in Delaware, `foreign` when formed
                    elsewhere and registered in Delaware.
                state:
                  anyOf:
                    - type: string
                    - type: 'null'
                  description: >-
                    State of formation as the Division prints it, e.g.
                    `DELAWARE`, `CALIFORNIA`.
                registered_agent:
                  anyOf:
                    - type: object
                      properties:
                        name:
                          anyOf:
                            - type: string
                            - type: 'null'
                          description: >-
                            The registered agent's name as the Division prints
                            it.
                        address:
                          anyOf:
                            - type: string
                            - type: 'null'
                          description: Street address of the registered office.
                        city:
                          anyOf:
                            - type: string
                            - type: 'null'
                        county:
                          anyOf:
                            - type: string
                            - type: 'null'
                          description: >-
                            Delaware county of the registered office, e.g. `New
                            Castle`.
                        state:
                          anyOf:
                            - type: string
                            - type: 'null'
                          description: Two-letter state code, normally `DE`.
                        postal_code:
                          anyOf:
                            - type: string
                            - type: 'null'
                        phone:
                          anyOf:
                            - type: string
                            - type: 'null'
                          description: As printed, e.g. `302-636-5401`.
                      required:
                        - name
                        - address
                        - city
                        - county
                        - state
                        - postal_code
                        - phone
                    - type: 'null'
                  description: >-
                    The registered agent on file, or null when the Division
                    lists none.
              required:
                - file_number
                - name
                - filed_on
                - entity_kind
                - entity_type
                - residency
                - state
                - registered_agent
            - type: 'null'
        checked_at:
          type: string
          description: When this answer was read from the Division, as an ISO timestamp.
      required:
        - found
        - file_number
        - entity
        - checked_at
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: 'Use Authorization: Bearer YOUR_API_KEY'

````