openapi: 3.1.0
info:
  title: QuestDB HTTP REST Chk Exp API
  version: 1.0.0
  description: HTTP REST endpoints exposed by QuestDB on the default HTTP port (9000) for SQL execution, CSV import/export, table existence checks, runtime metrics, and the InfluxDB Line Protocol HTTP ingestion endpoint. Authentication is unauthenticated by default in the open-source build; QuestDB Enterprise supports HTTP Basic Authentication and TLS.
  contact:
    name: QuestDB Documentation
    url: https://questdb.com/docs/
  license:
    name: Apache 2.0
    url: https://www.apache.org/licenses/LICENSE-2.0
servers:
- url: http://{host}:{port}
  description: QuestDB HTTP server
  variables:
    host:
      default: localhost
      description: QuestDB host
    port:
      default: '9000'
      description: QuestDB HTTP port
security:
- {}
- basicAuth: []
tags:
- name: Exp
paths:
  /exp:
    get:
      summary: Export query results as CSV
      description: Executes a SQL statement and streams the result set as CSV.
      operationId: exportCsv
      parameters:
      - name: query
        in: query
        required: true
        description: SQL statement to execute (URL-encoded).
        schema:
          type: string
      - name: limit
        in: query
        required: false
        description: Optional row range, for example `0,1000`.
        schema:
          type: string
      responses:
        '200':
          description: CSV export stream.
          content:
            text/csv:
              schema:
                type: string
        '400':
          description: Invalid query.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
      tags:
      - Exp
components:
  schemas:
    Error:
      type: object
      properties:
        query:
          type: string
        error:
          type: string
        position:
          type: integer
  securitySchemes:
    basicAuth:
      type: http
      scheme: basic
      description: HTTP Basic Authentication (QuestDB Enterprise).