> ## Documentation Index
> Fetch the complete documentation index at: https://docs.base39.com.br/llms.txt
> Use this file to discover all available pages before exploring further.

# Read an observation source and its recorded input paths



## OpenAPI

````yaml /api-reference/openapi.json get /v2/entities/{entityId}/features/{featureKey}/observations/{queryId}/sources/{sourceQueryId}
openapi: 3.1.0
info:
  title: Base39 API
  description: Base39 API
  version: 1.0.0
  contact:
    name: Base39 Team
    url: https://base39.com.br
    email: suporte@base39.com.br
  termsOfService: https://base39.com.br/termos
  license:
    name: Proprietary
    url: https://base39.com.br/termos
servers:
  - url: http://localhost:3000
    description: Local
  - url: https://api.dev.base39.cloud
    description: Development
  - url: https://api.base39.com.br
    description: Production
security:
  - OAuth2: []
tags:
  - name: pages
    description: Profiles and reports pages
  - name: pipelines
    description: Pipeline boards (kanban) of pages
  - name: blocks
    description: Blocks operations
  - name: search
    description: Search across content
  - name: targets
    description: Lookup targets via datasets
  - name: CognitoTriggers
    description: Cognito triggers
paths:
  /v2/entities/{entityId}/features/{featureKey}/observations/{queryId}/sources/{sourceQueryId}:
    get:
      tags:
        - Feature Store
      summary: Read an observation source and its recorded input paths
      operationId: feature_store_source
      parameters:
        - name: entityId
          required: true
          in: path
          schema:
            type: string
        - name: featureKey
          required: true
          in: path
          schema:
            type: string
        - name: queryId
          required: true
          in: path
          schema:
            type: string
        - name: sourceQueryId
          required: true
          in: path
          schema:
            type: string
      responses:
        '200':
          description: ''
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/FeatureSourceOutput'
components:
  schemas:
    FeatureSourceOutput:
      type: object
      properties:
        sourcePaths:
          description: >-
            Recorded JSON paths of the canonical inputs used by this attribute.
            Empty when exact field provenance is unavailable.
          type: array
          items:
            type: string
      required:
        - sourcePaths
  securitySchemes:
    OAuth2:
      type: oauth2
      flows:
        authorizationCode:
          authorizationUrl: https://id.local.base39.cloud/oauth2/authorize
          tokenUrl: https://id.local.base39.cloud/oauth2/token
          scopes:
            profile: Read user profile
            email: Read user email
            openid: OpenID authentication
      description: OAuth2 Authorization Code flow

````

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