> ## 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.

# SII Oficio

> Retrieve one oficio of Chile's Servicio de Impuestos Internos by its `id` from a search result (e.g. `3109`): its full text, number, date, tax, the norms it interprets, SII's summary, Croma's copy of its documents and the links to them on SII's own site. The text comes back a character range at a time (`offset`, `limit`); follow `next_offset` until `has_more` is false.

**Dataset endpoint**: answers from the whole source in milliseconds and carries `as_of`.



## OpenAPI

````yaml /api-reference/openapi.json post /cl/sii/oficio/v1
openapi: 3.1.0
info:
  title: Croma Marketplace API
  version: 1.0.0
  description: >-
    Government-data APIs for Colombia, Peru, Mexico, United States, Brazil, El
    Salvador, Bolivia, Japan, and Chile, plus 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: support@usecroma.com
servers:
  - url: https://api.croma.run
security: []
paths:
  /cl/sii/oficio/v1:
    post:
      tags:
        - Chile
        - Servicio de Impuestos Internos (SII)
      summary: SII Oficio
      description: >-
        Retrieve one oficio of Chile's Servicio de Impuestos Internos by its
        `id` from a search result (e.g. `3109`): its full text, number, date,
        tax, the norms it interprets, SII's summary, Croma's copy of its
        documents and the links to them on SII's own site. The text comes back a
        character range at a time (`offset`, `limit`); follow `next_offset`
        until `has_more` is false.


        **Dataset endpoint**: answers from the whole source in milliseconds and
        carries `as_of`.
      operationId: sii_oficio
      parameters:
        - $ref: '#/components/parameters/IdempotencyKey'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
                - oficio_id
              properties:
                oficio_id:
                  type: string
                  minLength: 1
                  maxLength: 120
                  description: >-
                    The oficio's `id` from a search result, e.g. `3109` or
                    `renta-2015-ja3298`.
                offset:
                  type: integer
                  minimum: 0
                  maximum: 10000000
                  default: 0
                  description: >-
                    First character of the range to return. Pass the previous
                    response's `next_offset` to continue reading.
                limit:
                  type: integer
                  minimum: 1000
                  maximum: 1000000
                  default: 200000
                  description: Maximum characters to return (1000-1000000).
              additionalProperties: false
            example:
              oficio_id: '3109'
      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/SiiOficioResponse'
        '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/chile/sii
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=100;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 spend no credits, but still count toward an
        hourly ceiling.
      schema:
        type: string
        enum:
          - HIT
          - MISS
    Retry-After:
      description: Seconds to wait before retrying.
      schema:
        type: integer
  schemas:
    SiiOficioResponse:
      type: object
      required:
        - data
      properties:
        data:
          $ref: '#/components/schemas/SiiOficioData'
    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.
    SiiOficioData:
      type: object
      properties:
        as_of:
          anyOf:
            - type: string
            - type: 'null'
          description: How current the data in this response is.
        found:
          type: boolean
        oficio_id:
          type: string
        oficio:
          anyOf:
            - type: object
              properties:
                id:
                  type: string
                  description: >-
                    The oficio's permanent id in Croma's copy, e.g. `3109` (2019
                    on) or `renta-2015-ja3298` (earlier years).
                subject:
                  type: string
                  enum:
                    - renta
                    - iva
                    - otras
                  description: >-
                    The tax the oficio answers about: `renta` (income tax),
                    `iva` (VAT) or `otras` (every other norm).
                number:
                  anyOf:
                    - type: string
                    - type: 'null'
                  description: >-
                    The oficio's number, e.g. `2815`. Numbers restart every
                    year.
                document_type:
                  anyOf:
                    - type: string
                    - type: 'null'
                  description: >-
                    The kind of oficio as SII names it: "Oficio Ordinario",
                    "Oficio" or "Ordinario".
                year:
                  type: number
                  description: The year SII files the oficio under.
                issued_at:
                  anyOf:
                    - type: string
                    - type: 'null'
                  description: '`yyyy-mm-dd` the oficio was issued.'
                published_at:
                  anyOf:
                    - type: string
                    - type: 'null'
                  description: '`yyyy-mm-dd` SII published it (2019 on; null before).'
                legal_references:
                  anyOf:
                    - type: string
                    - type: 'null'
                  description: >-
                    The norms the oficio interprets, as SII heads it, e.g.
                    "Renta – Ley sobre Impuesto a la – Art. 31 inciso cuarto N°
                    4".
                summary:
                  anyOf:
                    - type: string
                    - type: 'null'
                  description: SII's summary of the question the oficio answers.
                text_status:
                  type: string
                  enum:
                    - ok
                    - scanned
                    - missing
                  description: >-
                    `ok` when the full text is here; `scanned` when the document
                    is an image with no text in it; `missing` when SII publishes
                    no readable document.
                official_url:
                  type: string
                  description: The year's listing of oficios on SII's site.
                document_url:
                  anyOf:
                    - type: string
                    - type: 'null'
                  description: >-
                    Croma's copy of the oficio's main document (its PDF, or its
                    HTML page in earlier years), byte for byte as SII published
                    it.
                source_document_url:
                  anyOf:
                    - type: string
                    - type: 'null'
                  description: The oficio's main document on SII's own site.
                documents:
                  type: array
                  items:
                    type: object
                    properties:
                      name:
                        type: string
                        description: The file name as SII published it.
                      format:
                        type: string
                        description: >-
                          The file's format from its name: `pdf`, `htm`, `doc`,
                          `zip`, ...
                      document_url:
                        anyOf:
                          - type: string
                          - type: 'null'
                        description: >-
                          Croma's copy of the file, byte for byte as SII
                          published it. Null when SII no longer serves it.
                      source_document_url:
                        type: string
                        description: The file on SII's own site.
                      bytes:
                        anyOf:
                          - type: number
                          - type: 'null'
                        description: Size of the file in bytes, when the copy was made.
                    required:
                      - name
                      - format
                      - document_url
                      - source_document_url
                      - bytes
                  description: >-
                    Every file SII publishes with the oficio (the text and its
                    Word copy in earlier years).
                content:
                  anyOf:
                    - type: object
                      properties:
                        text:
                          type: string
                          description: The requested character range of the text.
                        offset:
                          type: number
                          description: First character of the range.
                        total_length:
                          type: number
                          description: Length of the whole text in characters.
                        has_more:
                          type: boolean
                          description: Whether the text continues past this range.
                        next_offset:
                          anyOf:
                            - type: number
                            - type: 'null'
                          description: >-
                            Pass this back as `offset` to read the next range.
                            Null at the end of the text.
                      required:
                        - text
                        - offset
                        - total_length
                        - has_more
                        - next_offset
                    - type: 'null'
                  description: >-
                    A range of the oficio's text, or null when `text_status` is
                    not `ok`.
              required:
                - id
                - subject
                - number
                - document_type
                - year
                - issued_at
                - published_at
                - legal_references
                - summary
                - text_status
                - official_url
                - document_url
                - source_document_url
                - documents
                - content
            - type: 'null'
      required:
        - as_of
        - found
        - oficio_id
        - oficio
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: 'Use Authorization: Bearer YOUR_API_KEY'

````

This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.