"How to Query a Knowledge Graph Using an Ontology" matching MCP servers:

Enables querying the Dutch RCE Cultural Heritage Objects linked data endpoint via SPARQL, with ontology guidance and query validation for safe, accurate results.

Enables AI agents to query a 282,731-node knowledge graph of art market transactions and provenance records, returning cited answers with <1% hallucination and explicit coverage gaps.

Provides a hosted, read-only MCP endpoint that answers questions about Spain's contributions to science, exploration, and culture using a knowledge graph where every claim is backed by cited sources and confidence scores. Enables agents to search, retrieve entities, explore related topics, and inspect the source registry for verification.

Provides access to a cited knowledge graph on football's Laws of the Game and major competitions, with tools for search, question answering, and entity exploration, returning claims with sources and confidence.

Enables LLMs to query the RCE Cultural Heritage SPARQL endpoint using ontology context, query validation, and predefined tools.

A read-only reference server for 303 curated generative art algorithms implemented in Python (py5), spanning physics, fractals, cellular automata, shaders, and more. Agents can search by keyword, visual mood (ethereal, chaotic, crystalline…), or multi-layer artistic intent to discover algorithms, read structured summaries, and fetch bounded source snippets.

Calculates Vietnamese Tử Vi horoscope charts, generating structured JSON with Thiên Bàn and Địa Bàn, transit analysis, and local persistence via SQLite.

MCP server for Metacritic that enables searching films, shows, and games, retrieving Metascores and audience scores, and accessing critic reviews with publication details and links, all without requiring an API key.

This MCP server provides tools to search for songs, artists, and random records from the Bide & Musique catalogue. It offers read-only access to tens of thousands of French songs with no authentication needed.

An MCP server that provides access to the Library of Babel, allowing users to retrieve exact page contents by address, search for text to find its location, and generate random pages.

Searches Danbooru for anime/game characters and their associated tags, providing tools to retrieve character profiles, co-occurring tags, wiki descriptions, and tag implications.

Enables searching and retrieving classical music works, scores, and recordings from IMSLP via natural language, without requiring an API key or account. It respects IMSLP's crawl policies and reports copyright status per jurisdiction.

An MCP server that enables searching tracks and fetching lyrics, including time-synced LRC lyrics, from LRCLIB without requiring an API key.

An MCP server that gives AI agents ex-Yugoslav cultural context, resolving cultural references with accurate quotes, attributions, and slang meanings from a citable database.

An MCP server for the Internet Archive that enables searching the full text of digitized books, browsing the catalogue, and reading Wayback Machine captures. No API key or configuration required.

MCP server for querying the Bibliothèque nationale de France catalogue. Enables searching authors and works, retrieving author details, listing editions, and finding digitised documents via SPARQL, without an API key.

Local MCP server for generating image assets with Google Gemini (Nano Banana 2 / Pro). Supports transparent PNG/WebP output, exact resizing/cropping, up to 14 reference images, and Google Search grounding.

Hosted Streamable HTTP MCP server for Vedic astrology: panchang, kundali (birth chart), matchmaking, dashas, doshas, muhurta and 16 tools computed by a precision astronomy engine.

Enables users to compute a full Chinese Bazi (Four Pillars of Destiny) chart from a birth date, time, and place, with True Solar Time correction and historical daylight saving adjustments, running fully offline via MCP.

Enables AI agents to cast deterministic BaZi, Zi Wei Dou Shu, and Western astrology natal charts from birth details, with no setup or API key.