openapi: 3.0.3
info:
  title: Cloudflare R2 Cloudflare Buckets Namespace Management API
  description: Cloudflare API endpoints for managing R2 object storage buckets, objects, CORS, lifecycle policies, custom domains, event notifications, data catalog, and temporary credentials.
  version: 4.0.0
  termsOfService: https://www.cloudflare.com/website-terms/
  contact:
    name: Cloudflare Developer Docs
    url: https://developers.cloudflare.com/r2/
servers:
- url: https://api.cloudflare.com/client/v4
  description: Cloudflare API v4
tags:
- name: Namespace Management
paths:
  /accounts/{account_id}/r2-catalog/{bucket_name}/namespaces:
    get:
      description: 'Returns a list of namespaces in the specified R2 catalog.

        Supports hierarchical filtering and pagination for efficient traversal

        of large namespace hierarchies.

        '
      operationId: list-namespaces
      parameters:
      - description: Identifies the account.
        in: path
        name: account_id
        required: true
        schema:
          $ref: '#/components/schemas/r2-data-catalog_account-id'
      - description: Specifies the R2 bucket name.
        in: path
        name: bucket_name
        required: true
        schema:
          $ref: '#/components/schemas/r2-data-catalog_bucket-name'
      - description: 'Opaque pagination token from a previous response.

          Use this to fetch the next page of results.

          '
        example: MSYxNzU5NzU1NTc4NTA0MTk0JjAxOTliOTliLTJjODgtNzNiMy04ZGJiLTQyMWUwZThmMjc1Nw
        in: query
        name: page_token
        schema:
          type: string
      - description: 'Maximum number of namespaces to return per page.

          Defaults to 100, maximum 1000.

          '
        example: 100
        in: query
        name: page_size
        schema:
          default: 100
          maximum: 1000
          minimum: 1
          type: integer
      - description: 'Parent namespace to filter by. Only returns direct children of this namespace.

          For nested namespaces, use %1F as separator (e.g., "bronze%1Fanalytics").

          Omit this parameter to list top-level namespaces.

          '
        example: bronze
        in: query
        name: parent
        schema:
          type: string
      - description: 'Whether to include namespace UUIDs in the response.

          Set to true to receive the namespace_uuids array.

          '
        example: true
        in: query
        name: return_uuids
        schema:
          default: false
          type: boolean
      - description: 'Whether to include additional metadata (timestamps).

          When true, response includes created_at and updated_at arrays.

          '
        example: true
        in: query
        name: return_details
        schema:
          default: false
          type: boolean
      responses:
        '200':
          content:
            application/json:
              example:
                errors: []
                messages: []
                result:
                  details:
                  - created_at: '2025-10-07T10:00:00Z'
                    namespace:
                    - bronze
                    namespace_uuid: 0199b999-6869-7383-bb1f-d30e059d5326
                    updated_at: '2025-10-07T12:00:00Z'
                  - created_at: '2025-10-07T10:15:00Z'
                    namespace:
                    - silver
                    namespace_uuid: 0199b99b-2c88-73b3-8dbb-421e0e8f2757
                    updated_at: null
                  - created_at: '2025-10-07T10:30:00Z'
                    namespace:
                    - gold
                    namespace_uuid: 0199b99c-3d99-73c4-9dcc-532f1f9g3868
                    updated_at: '2025-10-07T11:00:00Z'
                  namespace_uuids:
                  - 0199b999-6869-7383-bb1f-d30e059d5326
                  - 0199b99b-2c88-73b3-8dbb-421e0e8f2757
                  - 0199b99c-3d99-73c4-9dcc-532f1f9g3868
                  namespaces:
                  - - bronze
                  - - silver
                  - - gold
                  next_page_token: null
                success: true
              schema:
                allOf:
                - $ref: '#/components/schemas/r2-data-catalog_api-response-single'
                - properties:
                    result:
                      $ref: '#/components/schemas/r2-data-catalog_namespace-list-response'
                  type: object
          description: List of namespaces retrieved successfully.
        '400':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/r2-data-catalog_api-response-common-failure'
          description: Bad request (e.g., invalid page_size, malformed parent namespace).
        '401':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/r2-data-catalog_api-response-common-failure'
          description: Authentication failed.
        '403':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/r2-data-catalog_api-response-common-failure'
          description: Forbidden.
        '404':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/r2-data-catalog_api-response-common-failure'
          description: Catalog not found.
        '500':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/r2-data-catalog_api-response-common-failure'
          description: Internal server error.
      security:
      - api_token: []
      - api_email: []
        api_key: []
      summary: List namespaces in catalog
      tags:
      - Namespace Management
      x-api-token-group:
      - Workers R2 Data Catalog Write
      - Workers R2 Data Catalog Read
components:
  schemas:
    r2-data-catalog_api-response-errors:
      description: Contains errors if the API call was unsuccessful.
      items:
        properties:
          code:
            description: Specifies the error code.
            type: integer
          message:
            description: Describes the error.
            type: string
        required:
        - code
        - message
        type: object
      type: array
    r2-data-catalog_api-response-success:
      description: Indicates whether the API call was successful.
      example: true
      type: boolean
    r2-data-catalog_api-response-messages:
      description: Contains informational messages.
      items:
        properties:
          code:
            description: Specifies the message code.
            type: integer
          message:
            description: Contains the message text.
            type: string
        required:
        - code
        - message
        type: object
      type: array
    r2-data-catalog_namespace-identifier:
      description: 'Specifies the hierarchical namespace parts as an array of strings.

        For example, ["bronze", "analytics"] represents the namespace "bronze.analytics".

        '
      example:
      - bronze
      - analytics
      items:
        type: string
      maxItems: 16
      minItems: 1
      type: array
    r2-data-catalog_bucket-name:
      description: Specifies the R2 bucket name.
      example: my-data-bucket
      maxLength: 63
      minLength: 3
      pattern: ^[a-z0-9]([a-z0-9\-]*[a-z0-9])?$
      type: string
    r2-data-catalog_account-id:
      description: Use this to identify the account.
      example: 0123456789abcdef0123456789abcdef
      pattern: ^[a-fA-F0-9]{32}$
      type: string
    r2-data-catalog_api-response-single:
      properties:
        errors:
          $ref: '#/components/schemas/r2-data-catalog_api-response-errors'
        messages:
          $ref: '#/components/schemas/r2-data-catalog_api-response-messages'
        success:
          $ref: '#/components/schemas/r2-data-catalog_api-response-success'
      required:
      - success
      - errors
      - messages
      type: object
    r2-data-catalog_api-response-common-failure:
      properties:
        errors:
          items:
            properties:
              code:
                type: integer
              message:
                type: string
            type: object
          minItems: 1
          type: array
        messages:
          items:
            type: object
          type: array
        success:
          enum:
          - false
          type: boolean
      type: object
    r2-data-catalog_namespace-list-response:
      description: Contains the list of namespaces with optional pagination.
      properties:
        details:
          description: 'Contains detailed metadata for each namespace when return_details is true.

            Each object includes the namespace, UUID, and timestamps.

            '
          items:
            $ref: '#/components/schemas/r2-data-catalog_namespace-details'
          nullable: true
          type: array
        namespace_uuids:
          description: 'Contains UUIDs for each namespace when return_uuids is true.

            The order corresponds to the namespaces array.

            '
          example:
          - 0199b999-6869-7383-bb1f-d30e059d5326
          - 0199b99b-2c88-73b3-8dbb-421e0e8f2757
          items:
            format: uuid
            type: string
          nullable: true
          type: array
        namespaces:
          description: Lists namespaces in the catalog.
          items:
            $ref: '#/components/schemas/r2-data-catalog_namespace-identifier'
          type: array
        next_page_token:
          description: 'Use this opaque token to fetch the next page of results.

            A null or absent value indicates the last page.

            '
          example: MSYxNzU5NzU1NTc4NTA0MTk0JjAxOTliOTliLTJjODgtNzNiMy04ZGJiLTQyMWUwZThmMjc1Nw
          nullable: true
          type: string
      required:
      - namespaces
      type: object
    r2-data-catalog_namespace-details:
      description: Contains namespace with metadata details.
      properties:
        created_at:
          description: Indicates the creation timestamp in ISO 8601 format.
          format: date-time
          nullable: true
          type: string
        namespace:
          $ref: '#/components/schemas/r2-data-catalog_namespace-identifier'
        namespace_uuid:
          description: Contains the UUID that persists across renames.
          format: uuid
          type: string
        updated_at:
          description: Shows the last update timestamp in ISO 8601 format. Null if never updated.
          format: date-time
          nullable: true
          type: string
      required:
      - namespace
      - namespace_uuid
      type: object
  securitySchemes:
    api_email:
      in: header
      name: X-Auth-Email
      type: apiKey
    api_key:
      in: header
      name: X-Auth-Key
      type: apiKey
    api_token:
      scheme: bearer
      type: http
    user_service_key:
      in: header
      name: X-Auth-User-Service-Key
      type: apiKey