> ## 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 Circular > Retrieve one circular of Chile's Servicio de Impuestos Internos by its `id` (its year and number, e.g. `2026-41`): its full text, title, date, SII's summary, the issuing office, 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`). **Dataset endpoint**: answers from the whole source in milliseconds and carries `as_of`. ## OpenAPI ````yaml /api-reference/openapi.json post /cl/sii/circular/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/circular/v1: post: tags: - Chile - Servicio de Impuestos Internos (SII) summary: SII Circular description: >- Retrieve one circular of Chile's Servicio de Impuestos Internos by its `id` (its year and number, e.g. `2026-41`): its full text, title, date, SII's summary, the issuing office, 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`). **Dataset endpoint**: answers from the whole source in milliseconds and carries `as_of`. operationId: sii_circular parameters: - $ref: '#/components/parameters/IdempotencyKey' requestBody: required: true content: application/json: schema: type: object required: - circular_id properties: circular_id: type: string minLength: 1 maxLength: 40 description: >- The circular's `id` from a search result: its year and number, e.g. `2026-41`. 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: circular_id: 2026-41 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/SiiCircularResponse' '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: SiiCircularResponse: type: object required: - data properties: data: $ref: '#/components/schemas/SiiCircularData' 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. SiiCircularData: type: object properties: as_of: anyOf: - type: string - type: 'null' description: How current the data in this response is. found: type: boolean circular_id: type: string circular: anyOf: - type: object properties: id: type: string description: The act's year and number, e.g. `2026-41`. number: type: string description: The act's number, e.g. `41`. Numbers restart every year. year: type: number description: The year SII files the act under. title: type: string description: >- The act as SII titles it, e.g. "Circular N° 41 del 15 de Octubre del 2026". issued_at: anyOf: - type: string - type: 'null' description: '`yyyy-mm-dd` the act was issued.' summary: anyOf: - type: string - type: 'null' description: SII's summary of what the act does. issuing_office: anyOf: - type: string - type: 'null' description: >- The office SII names as the act's source ("Fuente"), e.g. "Subdirección Normativa". status: anyOf: - type: string - type: 'null' description: >- The note SII prints beside the act, e.g. "modificada" or "dejada sin efecto". Null when it prints none. 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 on SII's site. document_url: anyOf: - type: string - type: 'null' description: >- Croma's copy of the act's main document, byte for byte as SII published it. source_document_url: anyOf: - type: string - type: 'null' description: The act'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 act: its text, the Word copy, annexes. 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 act's text, or null when `text_status` is not `ok`. required: - id - number - year - title - issued_at - summary - issuing_office - status - text_status - official_url - document_url - source_document_url - documents - content - type: 'null' required: - as_of - found - circular_id - circular 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.