duckle

by slothflowlabs · Databases · ★ 1,526

duckle is an MCP server by slothflowlabs. Open-source ETL/ELT you deploy on your own servers or cloud. Built on DuckDB: no-code/low-code visual pipelines or SQL, 385 components, dbt, CDC, data quality, reverse ETL, lineage, MCP for AI agents. No vendor cloud, no per-row billing. It has 1,526 GitHub stars and ranks #26 of 630 in Databases by stars.

Category: Databases
Author: slothflowlabs
GitHub stars: 1,526
This week: Tracking since 18 Oct 2026
Language: Rust
License: Apache-2.0 (open source)
Last update: 2026-10-23 (yesterday)
Links: Source Website

cdc
connectors
data-engineering
data-integration
data-orchestration
data-pipeline
data-quality
data-transformation
dbt
duckdb
elt
etl
+8 more

How to install duckle

Install steps differ per project, so follow the README in the duckle repository. Most MCP servers start with a single command (npx -y <package>, uvx <package> or a Docker image) that you add to your client's config. The install guide shows where that goes in Claude Code, Claude Desktop, Cursor and VS Code.

Also listed in

MCP servers for Kubernetes114

Maintain this project? Get it featured ($99/mo, pinned at the top of Databases) or see what featuring includes.

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Frequently asked questions

What is duckle?

duckle is an MCP server by slothflowlabs in the Databases category. Open-source ETL/ELT you deploy on your own servers or cloud. Built on DuckDB: no-code/low-code visual pipelines or SQL, 385 components, dbt, CDC, data quality, reverse ETL, lineage, MCP for AI agents. No vendor cloud, no per-row billing. It has 1,526 GitHub stars and ranks #26 of 630 in Databases by stars.

Is duckle free and open source?

Yes. duckle is published under the Apache-2.0 license, so you can run, modify and self-host it at no cost. If it connects to a paid service, that service's own pricing and API terms still apply. Check the repository for the exact license text before using it commercially.

What are the alternatives to duckle?

Other Databases projects on MCP Harbor include Chat2DB, dbx, mcp-toolbox. Each alternative links to its own page with stars, license and recent activity. The Databases category ranks all 630 by stars, and you can re-sort it by growth this week.

Alternatives to duckle

Chat2DB★ 28,331

OtterMind · Java+8 stars this week (+0%)

Chat2DB is a free, cross-platform, local-first database client and SQL workspace for developers, DBAs, analysts, and data teams. Connect to 40+ databases, manage data, edit and run SQL, and use your own AI model to generate, explain, and optimize queries. Available on desktop, web, Docker, and CLI,

dbxTrending★ 27,661

t8y2 · Rust+615 stars this week (+2.3%)

25 MB lightweight cross-platform database client for 100+ databases, including MySQL, PostgreSQL, SQLite, Redis, MongoDB, DuckDB, SQL Server, and Dameng. Built-in AI, MCP Server, CLI, desktop and Docker. | 轻量级跨平台数据库管理工具，支持 MySQL、PostgreSQL、SQLite、Redis、MongoDB、达梦等 100+ 数据库，提供桌面端、Docker、CLI、内置 AI 助手和

mcp-toolbox★ 16,717

googleapis · Go+44 stars this week (+0.3%)

MCP Toolbox for Databases is an open source MCP server for databases.

nightingale★ 13,383

ccfos · Go+17 stars this week (+0.1%)

Open-source, self-hosted alerting for metrics, logs, and databases. Includes a built-in AI agent and MCP server.

electric★ 10,412

electric-sql · TypeScript

The agent platform built on sync.

mission-control★ 6,389

builderz-labs · TypeScript+28 stars this week (+0.4%)

Self-hosted control plane for AI agents: dispatch tasks, review runs, track spend, and operate OpenClaw, Claude Code, Codex, and other runtimes.

All 630 Databases MCP servers →

Data last updated 25 October 2026. Stars and downloads are refreshed every day from GitHub and npm.