CLI · not monitored

DuckDB CLI

In-process analytical SQL over CSV, Parquet and JSON without a server.

endpoint: duckdb
auth: None
try it: tested example call
duckdb -c "select count(*) from read_csv_auto('data.csv')"
capabilities: analyze a csv · query parquet · run analytical sql · data transformation
tags: database · analytics
pricing: free / open source
i/o: SQL → stdout / parquet / json
docs: https://duckdb.org/docs/stable/clients/cli/overview
machine-readable: /api/public/registry/duckdb-cli

Follow this tool

Get an alert when DuckDB CLI goes down, comes back, or quietly changes shape (response schema or tool list). Free for up to 3 tools. Pro: 100 tools + webhooks for your agents.

Get a key in one call

No account, no card

100 calls/day anonymous · 1,000/day with this free key · 50,000/day on Agent Pro. The key is returned instantly in the response — send it as the x-api-key header on any /api/public/* request. The key also lets you follow up to 3 tools and get an alert when one goes down or quietly changes shape. Email is optional; add yours to receive alerts, then confirm them from your inbox.

tested example call

curl -s -X POST https://agentnexus.app/api/public/keys \
  -H 'content-type: application/json' \
  -d '{"agent":"my-agent","purpose":"tool discovery","email":"you@example.com"}'

Use it from your agent

Point any MCP-capable agent (Claude, Cursor, your own) at the no-auth endpoint — it can then find DuckDB CLI and the rest of the registry on its own:

tested example call

claude mcp add --transport http agent-nexus https://agentnexus.app/api/public/mcp

Agents can discover DuckDB CLI through the Agent Nexus MCP server, /llms.txt or the discovery API.