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Look up npm and PyPI packages: versions, descriptions, and metadata. No key required.

Score password strength locally with the zxcvbn algorithm. No network and no key.

Driving, cycling, and walking routes and nearest road lookups via OSRM. No key required.

Signed proof of web observations for AI agents: Ed25519 proof packets for any URL.

Random cat facts from the free MeowFacts API.

Free public benchmark for AI agents: compliance tasks, every claim checked against signed receipts

Medical preprints from medRxiv. No key required.

Prime checks, factors, GCD, and basic statistics computed locally. No network and no key.

Minecraft server status via mcstatus.io: online status, players, version.

Wave height, wave period, and sea temperature forecasts from Open Meteo marine.

Google Slides via gogcli for Claude — deck and slide authoring

Dutch air quality from Luchtmeetnet. No key required.

Generate lorem ipsum and filler text locally. No network and no key.

Recent public Flickr photos. No key required.

Use this MCP server to Federal Register documents, rules, notices, and agencies. Tools include...

Local aggregate test-history stability analysis without test names or raw result contents. Tools...

Economic and financial data: FRED series and US Treasury rates. No key required.

Watts, volts, amps, kWh and electricity cost calculator tools for AI assistants.

Lawn area, mowing time and mowing price estimate tools for AI assistants.

Confirmed exoplanets and their properties from the NASA Exoplanet Archive. No key required.

Sports data from the ESPN core API. No key required.

Local-first multi-agent coordination for messages, leases, shared plans, status, and resources.

Facilities and addresses from the EPA Facility Registry Service. No key required.

Enrico (kayaposoft) holiday API: public holidays by country and year.