Data Commons REST API V2

openapi: 3.1.0
info:
  title: Data Commons REST API V2
  version: "2.0"
  description: >-
    Minimal OpenAPI description of the Data Commons V2 REST API for fetching
    statistical observations, querying graph nodes, and resolving entities.
    Generated from public Data Commons documentation.
  x-generated-from: https://docs.datacommons.org/api/rest/v2/
  x-generated-by: claude-crawl-2026-05-08
servers:
  - url: https://api.datacommons.org/v2
    description: Data Commons production
security:
  - apiKeyHeader: []
  - apiKeyQuery: []
tags:
  - name: Observation
  - name: Node
  - name: Resolve
paths:
  /observation:
    get:
      tags: [Observation]
      summary: Fetch statistical observations
      parameters:
        - $ref: '#/components/parameters/KeyQuery'
        - name: date
          in: query
          schema:
            type: string
        - name: select
          in: query
          schema:
            type: array
            items:
              type: string
        - name: entity.dcids
          in: query
          schema:
            type: array
            items:
              type: string
        - name: entity.expression
          in: query
          schema:
            type: string
        - name: variable.dcids
          in: query
          schema:
            type: array
            items:
              type: string
      responses:
        "200":
          description: OK
          content:
            application/json:
              schema:
                type: object
    post:
      tags: [Observation]
      summary: Fetch statistical observations
      requestBody:
        content:
          application/json:
            schema:
              type: object
      responses:
        "200":
          description: OK
          content:
            application/json:
              schema:
                type: object
  /node:
    get:
      tags: [Node]
      summary: Query node properties and arcs
      parameters:
        - $ref: '#/components/parameters/KeyQuery'
        - name: nodes
          in: query
          schema:
            type: array
            items:
              type: string
        - name: property
          in: query
          schema:
            type: string
      responses:
        "200":
          description: OK
          content:
            application/json:
              schema:
                type: object
    post:
      tags: [Node]
      summary: Query node properties and arcs
      requestBody:
        content:
          application/json:
            schema:
              type: object
      responses:
        "200":
          description: OK
          content:
            application/json:
              schema:
                type: object
  /resolve:
    get:
      tags: [Resolve]
      summary: Resolve entities to Data Commons IDs
      parameters:
        - $ref: '#/components/parameters/KeyQuery'
        - name: nodes
          in: query
          schema:
            type: array
            items:
              type: string
        - name: property
          in: query
          schema:
            type: string
      responses:
        "200":
          description: OK
          content:
            application/json:
              schema:
                type: object
    post:
      tags: [Resolve]
      summary: Resolve entities to Data Commons IDs
      requestBody:
        content:
          application/json:
            schema:
              type: object
      responses:
        "200":
          description: OK
          content:
            application/json:
              schema:
                type: object
components:
  parameters:
    KeyQuery:
      name: key
      in: query
      schema:
        type: string
  securitySchemes:
    apiKeyHeader:
      type: apiKey
      in: header
      name: X-API-Key
    apiKeyQuery:
      type: apiKey
      in: query
      name: key