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

# Get an extension namespace

> Returns the JSON payload for one extension namespace on the item. The caller must hold `read` (or `write`) on the namespace in `extension_permissions` — missing permission returns `403 forbidden` regardless of the caller's type access to the parent item.



## OpenAPI

````yaml /openapi.json get /items/{id}/extensions/{namespace}
openapi: 3.1.0
info:
  title: Marfa API
  version: 4.2.0
  description: Typed data layer for structured personal data
servers: []
security: []
paths:
  /items/{id}/extensions/{namespace}:
    get:
      tags:
        - Extensions
      summary: Get an extension namespace
      description: >-
        Returns the JSON payload for one extension namespace on the item. The
        caller must hold `read` (or `write`) on the namespace in
        `extension_permissions` — missing permission returns `403 forbidden`
        regardless of the caller's type access to the parent item.
      parameters:
        - schema:
            type: string
          required: true
          name: id
          in: path
        - schema:
            type: string
          required: true
          name: namespace
          in: path
      responses:
        '200':
          description: Extension namespace data
          content:
            application/json:
              schema:
                type: object
                properties:
                  namespace:
                    type: string
                  data:
                    type: object
                    nullable: true
                    additionalProperties:
                      nullable: true
                required:
                  - namespace
                  - data
        '400':
          description: Invalid item ID
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: object
                    properties:
                      code:
                        type: string
                        enum:
                          - invalid_id
                      message:
                        type: string
                      details:
                        type: object
                        additionalProperties:
                          nullable: true
                    required:
                      - code
                      - message
                required:
                  - error
        '401':
          description: Unauthorized
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: object
                    properties:
                      code:
                        type: string
                        enum:
                          - unauthorized
                      message:
                        type: string
                      details:
                        type: object
                        additionalProperties:
                          nullable: true
                    required:
                      - code
                      - message
                required:
                  - error
        '403':
          description: No read access to namespace
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: object
                    properties:
                      code:
                        type: string
                        enum:
                          - forbidden
                      message:
                        type: string
                      details:
                        type: object
                        additionalProperties:
                          nullable: true
                    required:
                      - code
                      - message
                required:
                  - error
        '404':
          description: Item not found
          content:
            application/json:
              schema:
                type: object
                properties:
                  error:
                    type: object
                    properties:
                      code:
                        type: string
                        enum:
                          - item_not_found
                      message:
                        type: string
                      details:
                        type: object
                        additionalProperties:
                          nullable: true
                    required:
                      - code
                      - message
                required:
                  - error
      security:
        - bearerAuth: []
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: API Key or OAuth Token
      description: Pass an API key (marfa_k1_...) or OAuth access token (marfa_at_...)

````