> ## 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.

# CNBV Regulation History

> Every modifying resolución and annex for one CNBV norma (by `regulation_id` from `cnbv-regulations`), each with its DOF date and official PDF. The Circular Única de Bancos alone carries 180+ modifications.



## OpenAPI

````yaml /api-reference/openapi.json post /mx/cnbv/regulation-history/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.
servers:
  - url: https://api.croma.run
security: []
paths:
  /mx/cnbv/regulation-history/v1:
    post:
      tags:
        - Mexico
        - CNBV
      summary: CNBV Regulation History
      description: >-
        Every modifying resolución and annex for one CNBV norma (by
        `regulation_id` from `cnbv-regulations`), each with its DOF date and
        official PDF. The Circular Única de Bancos alone carries 180+
        modifications.
      operationId: cnbv_regulation_history
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
                - regulation_id
              properties:
                regulation_id:
                  type: string
                  pattern: ^\d{1,10}$
                  description: >-
                    Norm identifier returned by the regulations list
                    (`regulation_id`).
              additionalProperties: false
            example:
              regulation_id: '1024'
      responses:
        '200':
          description: Successful response
          headers:
            X-Request-Id:
              description: >-
                Unique id for the request (req_…). Include it in support
                reports.
              schema:
                type: string
            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
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CnbvRegulationHistoryResponse'
        '400':
          description: Invalid request body
          headers:
            X-Request-Id:
              description: >-
                Unique id for the request (req_…). Include it in support
                reports.
              schema:
                type: string
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiError'
        '401':
          description: Missing or invalid API key
          headers:
            X-Request-Id:
              description: >-
                Unique id for the request (req_…). Include it in support
                reports.
              schema:
                type: string
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiError'
        '429':
          description: Rate limit exceeded
          headers:
            X-Request-Id:
              description: >-
                Unique id for the request (req_…). Include it in support
                reports.
              schema:
                type: string
            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
            Retry-After:
              description: Seconds to wait before retrying.
              schema:
                type: integer
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiError'
        '500':
          description: Internal error
          headers:
            X-Request-Id:
              description: >-
                Unique id for the request (req_…). Include it in support
                reports.
              schema:
                type: string
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiError'
        '502':
          description: Upstream source returned an error
          headers:
            X-Request-Id:
              description: >-
                Unique id for the request (req_…). Include it in support
                reports.
              schema:
                type: string
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiError'
      security:
        - bearerAuth: []
      externalDocs:
        description: Interactive documentation and examples
        url: https://docs.usecroma.com/guides/mexico/cnbv
components:
  schemas:
    CnbvRegulationHistoryResponse:
      type: object
      required:
        - data
      properties:
        data:
          type: object
          required:
            - found
            - regulation_id
            - modifications
            - annexes
          properties:
            found:
              type: boolean
            regulation_id:
              type: string
            modifications:
              type: array
              items:
                type: object
                required:
                  - description
                  - dof_date
                  - pdf_url
                  - order
                properties:
                  description:
                    type: string
                  dof_date:
                    type:
                      - string
                      - 'null'
                    format: date
                  pdf_url:
                    type:
                      - string
                      - 'null'
                    format: uri
                  order:
                    type:
                      - number
                      - 'null'
            annexes:
              type: array
              items:
                type: object
                required:
                  - description
                  - pdf_url
                  - order
                properties:
                  description:
                    type: string
                  pdf_url:
                    type:
                      - string
                      - 'null'
                    format: uri
                  order:
                    type:
                      - number
                      - 'null'
    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.
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: 'Use Authorization: Bearer YOUR_API_KEY'

````