"Merchant Category Code (MCC) data lookup" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
Zero-auth K-12 + early-childhood datasets: Dolch words, TR-EN flashcards, Spanish, creator data.
An MCP server for Perigee, the open-source 3D viewer of the artificial objects orbiting the Earth, the Moon and Mars and of the spacecraft crossing the solar system. It lets an AI assistant (a teaching assistant, for example) answer questions such as “how far is Mars from the Earth on 1 December 2026?”, “where is the ISS now?” or “what is Lucy's mission?”, and hand the student a live 3D view, with how each number was obtained, from which data, how fresh and how accurate.
Astrology for AI assistants: natal chart (planets, houses, angles, aspects), today's transits to a chart, the sky of a day, the Vedic chart with Vimshottari dasha, and links to AstralRead's knowledge base. Read-only, no account; birth data is not stored. English and Russian.
Research methods for AI assistants: study design guidance, R and Python code, and citations
Read Jackrabbit Class beta data, create students and add class waitlist entries.
Query core AI knowledge, essays, executable Labs, Homeric data and epistemic claims.
Free trading calculators, trading-system rules, a glossary and lesson search. No market data.
ScanSing reads printed sheet music. Give Claude a PDF or a photo of a score and it gets back MusicXML, the format MuseScore, Sibelius, Finale and Dorico open. It is the recogniser inside the ScanSing app for choir singers, offered as a connector. Once a score is recognised, Claude can answer questions about it without recognising it again: - what the key, time signature, tempo and length are, and each part's range, clefs and lyrics; - one voice on its own, for example just the alto line of a choir piece; - the score or a part moved to another key, with notes respelled for the new key signature; - a MIDI file, one track per part, to listen to or rehearse with; - a short-lived download link to open the result in a browser or notation app. It handles PDFs up to 40 pages and PNG, JPEG, HEIC, TIFF and WebP images, can recognise selected pages of a long PDF, and can split a songbook into one MusicXML per piece. A file can be given as a web link or a small image; in Claude Code, a file on your computer is sent through a one-time upload link. Recognition spends pages from your ScanSing plan, so it is the only tool that is not read-only. Everything else works on the stored result and is free. The first connection with a new email comes with 20 free pages; paid plans start at $9 a month for 300 pages. Scores and results are deleted about an hour after recognition and are never used for training.
**Swiss B2B sales and everyday-AI know-how — inside your AI assistant.** 113 free 5-minute learning modules from [latzerus.ch](https://www.latzerus.ch). No account, no API key, no cookies. `https://mcp.latzerus.ch/mcp` --- **`lernmodule_suchen`** — search all modules. Understands paraphrases, synonyms, plural forms and typos. **`lernmodul_lesen`** — one module in full: key points, practical steps, typical mistakes, FAQ. **`lernmodule_uebersicht`** — everything grouped by theme, or just one theme. **`ueber_latzerus`** — what the project is and who is behind it. --- **Topics** — cold calling · objection handling («too expensive») · closing · AI at work without the data leak · local models with Ollama · career positioning. **The modules are written in German.** So are the tool names — your assistant handles that. --- **Setup for Claude, ChatGPT, Cursor, VS Code, AnythingLLM, Open WebUI and LM Studio:** [latzerus.ch/mcp](https://www.latzerus.ch/mcp/) **Source, MIT:** [github.com/kriswindu/latzerus-mcp](https://github.com/kriswindu/latzerus-mcp) Knowledge project of Christoph Latzer, St. Gallen / Zurich. Quoting welcome — please name the source.
Riddle.com is a no-code platform for quizzes, surveys, personality tests, prediction games, interactive graphics, and leaderboards. Use the MCP to create, edit and analyze content.
Grounds LLMs in real Old Norse: lemmas, mediopassive paradigms, English→Old Norse lookup.
California school data for AI agents — scores, profiles, comparisons, feeder paths, UC pipelines.
Open number-sense practice data and game catalogue for dyscalculia. Read-only.
2027 rankings of trading schools and prop firms, every criterion sourced, plus market data
Makuri (EU AI tutoring for immigrant children): 11 tools, 2 interactive panels, no user data.
Valmiki Ramayana verses: lookup, search and verse-of-the-day in 4 languages
Read-only catalogue of AssessAll (assessall.com), an online assessment platform by Bodhih Training Solutions. Search aptitude, English, leadership, sales, compliance and workplace-judgment assessments with one-time INR and USD prices (equal to checkout), list free no-signup practice tests, and search guides on validity, cut scores, CEFR and 360 feedback. No account or API key; public data only.
German armed forces ranks: lookup, comparison, NATO codes, promotion, US/UK equivalents, pay.
Search, compare, and analyze U.S. college data — costs, earnings, programs, and outcomes.
Compare state 529 plans, look up college costs and check qualified 529 expenses. Free, no key.
