DuckDB website screenshot

DuckDB

DuckDB is an in-process, MIT-licensed analytical SQL database with no external dependencies. It runs as a library embedded in the host application (CLI, Python, Node.js, R, Java/JDBC, Go, Wasm, etc.) and does not expose a network REST API.

DuckDB publishes 1 API on the APIs.io network. Tagged areas include Database, Analytics, OLAP, Embedded, and Open Source.

DuckDB’s developer surface includes developer portal, engineering blog, and 10 more developer resources.

🌐 Visit website 📡 Source on GitHub
21.0/100 emerging ▬ flat Agent 3/100 human only Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessFreemium
1 APIs
DatabaseAnalyticsOLAPEmbeddedOpen Source

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 21.0/100 · emerging
Contract Quality 0.0 / 25
Developer Ergonomics 2.2 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 4.1 / 13
Governance 0.0 / 12
Discoverability 6.9 / 10
Agent readiness — 3/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/duckdb: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

DuckDB In-Process Library

DuckDB ships as a library with first-class bindings for Python, R, Java (JDBC), Node.js, C/C++, Go, Rust, Swift, Julia, and the browser via DuckDB-Wasm. There is no network REST...

Pricing Plans 1

Published pricing tiers and plan structures.

Duckdb Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Duckdb Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Duckdb Finops

FINOPS

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Duckdb Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Portal
Portal

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LlmsText
LlmsText

Build 1

SDKs, sample code, and the tooling you integrate with

SourceCode
SourceCode

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

RateLimits
RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans
Plans
 FinOps
FinOps

Company 3

The organization behind the API

LinkedIn
LinkedIn
 Website
Website
 Blog
Blog

Other 2

Properties that don't map to a standard resource type

Foundation
Foundation
 MotherDuck (cloud DuckDB)
CommercialOffering

Source (apis.yml)

apis.yml Raw ↑ 
aid: duckdb
url: https://raw.githubusercontent.com/api-evangelist/duckdb/refs/heads/main/apis.yml
name: DuckDB
kind: opensource
description: DuckDB is an in-process, MIT-licensed analytical SQL database with no external dependencies. It runs as a library
  embedded in the host application (CLI, Python, Node.js, R, Java/JDBC, Go, Wasm, etc.) and does not expose a network REST
  API.
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/duckdb.png
tags:
- Database
- Analytics
- OLAP
- Embedded
- Open Source
created: '2026-05-08'
modified: '2026-05-08'
specificationVersion: '0.19'
apis:
- aid: duckdb:duckdb-library
  name: DuckDB In-Process Library
  humanURL: https://duckdb.org/docs/
  baseURL: in-process (no network endpoint)
  tags:
  - Embedded
  - SQL
  - Library
  - Wasm
  description: DuckDB ships as a library with first-class bindings for Python, R, Java (JDBC), Node.js, C/C++, Go, Rust, Swift,
    Julia, and the browser via DuckDB-Wasm. There is no network REST API; clients call DuckDB in-process. Extensions like
    httpfs allow DuckDB itself to act as an HTTP/S3 client.
  properties:
  - type: Documentation
    url: https://duckdb.org/docs/
  - type: SourceCode
    url: https://github.com/duckdb/duckdb
  - type: License
    url: https://github.com/duckdb/duckdb/blob/main/LICENSE
  - type: SDKs
    title: Python
    url: https://duckdb.org/docs/api/python/overview
  - type: SDKs
    title: Node.js
    url: https://duckdb.org/docs/api/nodejs/overview
  - type: SDKs
    title: Wasm
    url: https://duckdb.org/docs/api/wasm/overview
common:
- type: DomainSecurity
  url: security/duckdb-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/duckdb
- type: Website
  url: https://duckdb.org/
- type: Portal
  url: https://duckdb.org/docs/
- type: SourceCode
  url: https://github.com/duckdb/duckdb
- type: Foundation
  url: https://duckdb.org/foundation/
- type: CommercialOffering
  title: MotherDuck (cloud DuckDB)
  url: https://motherduck.com/
- type: Plans
  url: plans/duckdb-plans-pricing.yml
- type: RateLimits
  url: rate-limits/duckdb-rate-limits.yml
- type: FinOps
  url: finops/duckdb-finops.yml
- type: Blog
  url: https://duckdb.org/feed.xml
- type: Integrations
  url: https://duckdb.org/ecosystem/
- type: LlmsText
  url: https://duckdb.org/llms.txt
integrations:
- name: DuckDB Logo for Download
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com