MCP servers

Dutch air quality from Luchtmeetnet. No key required.

Song lyrics by artist and title from the public lyrics service. No key required.

Look up the vendor of a MAC address from the MAC Vendors database. No key required.

Temporary email domains from Mail.tm. No key required.

MCP server for Mailgun: domains, stats, bounces, complaints. Needs a free API key.

MCP server for Mailjet: contacts, messages, campaigns. Needs free API keys.

Threat intelligence for IPs and domains from Maltiverse. No key required.

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

Convert markdown to HTML and extract headings locally. No network and no key.

Marketstack API: EOD prices, history, tickers, exchanges, dividends.

Mastodon instance info and trends. No key required.

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

Search Java libraries and artifacts on Maven Central. No key required.

Boston transit from MBTA. No key required.

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

Search the MDN web docs for HTML, CSS, and JavaScript. No key required.

Medical preprints from medRxiv. No key required.

Random cat facts from the free MeowFacts API.

Tempo and timing math for musicians. No network and no key.

Crypto prices from MEXC. No key required.

Keyless Turkish weather: provinces, districts, current, forecasts.

Link previews from Microlink. No key required.

MIDI note math: note names, frequencies, and note numbers. No network and no key.

Find local migration numbering gaps and rollback pairing signals without returning SQL, paths,...

MCP server for Milvus: collections, stats, search. Works with any instance.