# QuestDB

**Canonical:** https://apis.io/providers/questdb/  
**Website:** https://questdb.com/  
**APIs profiled:** 10

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).

## Kin Score — 33.1 / 100 (thin)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 33.1).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 52.8 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 13.2 |
| Developer Ergonomics | 23.8 |
| Commercial Clarity | 26.3 |
| Access Clarity | 26.3 |

## Agent readiness — 19.8 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (10)

- **QuestDB HTTP REST API** — HTTP REST endpoints for SQL execution (/exec), CSV import (/imp), CSV export (/exp), health/metrics (/chk, /metrics) and runtime settings (/settings). Default port 9000.
- **QuestDB ILP TCP Ingestion** — InfluxDB Line Protocol over TCP for high-throughput, low-latency time-series ingestion. Default port 9009. Supports authentication and TLS in Enterprise.
- **QuestDB ILP HTTP Ingestion** — 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) a...
- **QuestDB PostgreSQL Wire Interface** — 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 SQ...
- **QuestDB Chk API** — The Chk API from QuestDB — 1 operation(s) for chk.
- **QuestDB Exec API** — The Exec API from QuestDB — 1 operation(s) for exec.
- **QuestDB Exp API** — The Exp API from QuestDB — 1 operation(s) for exp.
- **QuestDB Imp API** — The Imp API from QuestDB — 1 operation(s) for imp.
- **QuestDB Settings API** — The Settings API from QuestDB — 1 operation(s) for settings.
- **QuestDB Write API** — The Write API from QuestDB — 1 operation(s) for write.

## Agentic access (1)

- **Questdb Agentic Access** — 6 operations · 2 acting

## Security (2)

- **Questdb Authentication** — http · 1 scheme
- **Questdb Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Questdb Plans Pricing**

## Tags

Database, Time Series, SQL, Open-Source, Performance, ILP, PostgreSQL

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/questdb/). Scores are computed from the provider's own public artifacts under a published rubric.