QuestDB

aid: questdb
url: https://raw.githubusercontent.com/api-evangelist/questdb/refs/heads/main/apis.yml
name: QuestDB
x-type: company
description: >-
  QuestDB is a high-performance open-source time-series database. It exposes
  three programmatic surfaces — an HTTP REST API for SQL queries and CSV
  import/export, the InfluxDB Line Protocol (ILP) over TCP and HTTP for
  high-throughput ingestion, and the PostgreSQL wire protocol for compatibility
  with existing tooling. QuestDB is offered as open-source, Enterprise
  (self-hosted) and Bring-Your-Own-Cloud (BYOC).
image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
tags:
  - Database
  - Time-Series
  - SQL
  - Open Source
  - Performance
  - ILP
  - PostgreSQL
created: '2026-05-08'
modified: '2026-05-08'
specificationVersion: '0.19'
apis:
  - aid: questdb:rest-http
    name: QuestDB HTTP REST API
    description: >-
      HTTP REST endpoints for SQL execution (/exec), CSV import (/imp), CSV
      export (/exp), health/metrics (/chk, /metrics) and runtime settings
      (/settings). Default port 9000.
    image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
    humanURL: https://questdb.com/docs/reference/sql/overview/
    baseURL: http://<host>:9000
    tags:
      - REST
      - SQL
      - CSV
      - Health
      - Metrics
    properties:
      - type: Documentation
        url: https://questdb.com/docs/
      - type: APIReference
        url: https://questdb.com/docs/reference/api/rest/
  - aid: questdb:ilp-tcp
    name: QuestDB ILP TCP Ingestion
    description: >-
      InfluxDB Line Protocol over TCP for high-throughput, low-latency time-series
      ingestion. Default port 9009. Supports authentication and TLS in Enterprise.
    image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
    humanURL: https://questdb.com/docs/reference/api/ilp/overview/
    baseURL: tcp://<host>:9009
    tags:
      - ILP
      - TCP
      - Ingestion
    properties:
      - type: Documentation
        url: https://questdb.com/docs/reference/api/ilp/overview/
  - aid: questdb:ilp-http
    name: QuestDB ILP HTTP Ingestion
    description: >-
      Influx Line Protocol over HTTP /write endpoint for ingestion clients that
      prefer HTTP (TLS, auth and ack semantics easier than the TCP variant).
      Served on the same port (9000) as the REST API.
    image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
    humanURL: https://questdb.com/docs/reference/api/ilp/overview/
    baseURL: http://<host>:9000
    tags:
      - ILP
      - HTTP
      - Ingestion
  - aid: questdb:postgres-wire
    name: QuestDB PostgreSQL Wire Interface
    description: >-
      PostgreSQL wire-protocol compatibility for queries via psql, JDBC and any
      Postgres-compatible client. Default port 8812. Supports a subset of
      Postgres features sufficient for SQL analytics on QuestDB.
    image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
    humanURL: https://questdb.com/docs/develop/connect/
    baseURL: postgres://<host>:8812
    tags:
      - PostgreSQL
      - Wire Protocol
      - JDBC
common:
  - type: Website
    url: https://questdb.com/
  - type: Documentation
    url: https://questdb.com/docs/
  - type: Pricing
    url: https://questdb.com/enterprise/
  - type: GitHub
    url: https://github.com/questdb/questdb
  - type: BYOC
    url: https://questdb.com/byoc/
  - type: Plans
    url: plans/questdb-plans-pricing.yml
  - type: RateLimits
    url: rate-limits/questdb-rate-limits.yml
  - type: FinOps
    url: finops/questdb-finops.yml
maintainers:
  - FN: Kin Lane
    email: [email protected]