"An open-source backend service for web and app development" matching MCP servers:

Federated, license-verified search across open-access museum collections — currently The Met, Cleveland, AIC, Wikimedia Commons, and Europeana, with more being added. Strict-default-deny rights gate accepts only CC0 / Public Domain Mark, returning reuse-safe artwork with citations in three styles.

A Model Context Protocol (MCP) server for the Open Library API that enables AI assistants to search for book information.

Connects AI assistants to the Open Library API for searching books and authors, retrieving metadata, and comparing works.

Thin Host Protocol Adapter between an MCP host and the Drama Plugin, exposing plugin tools via MCP with automatic discovery and secure routing.

Provides access to Internet Archive's Open Library metadata, enabling queries about books, authors, and subjects via natural language through the Pipeworx gateway.

MCP server that gives AI agents access to the world's public domain library. Search, read, and navigate books and audiobooks from Project Gutenberg and LibriVox.

A 3-tier relay service that serves MCP tools via WebSocket, including calculator, scripture lookup, and location-based recommendations.

Provides tools to fetch IIIF manifests and retrieve specific image regions or scaled images for analysis. This server enables detailed interaction with International Image Interoperability Framework resources, supporting tasks like image description and transcription.

MCP server that enables searching books by author via Open Library API and searching keywords inside local text files.

Exposes 97 official Shanghai Library open data APIs and the Sou-Yun poetry database (1.99 million poems) as 12 MCP tools, covering genealogy, ancient books, calligraphy, historical buildings, and more. Enables MCP clients to query these datasets using natural language.

Provides AI assistants with access to search, explore, and analyze over 3 million collection objects from the Smithsonian Institution's museums. Enables finding objects currently on exhibit, retrieving detailed metadata, high-resolution images, and 3D models from America's national museums.

Remote MCP server for Zi Wei Dou Shu / Tu Vi Dau So astrology tools, exposing read-only tools like get_astrolabe, get_horoscope_decades, etc., designed for Railway deployment and OpenAI ChatGPT developer mode.

Fetches books by genre or subject from the Open Library API without requiring an API key, returning titles, authors, and publication years.

Enables querying genealogical records, archive statistics, historical weather, and full-text transcriptions from Open Archives via natural language.

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MCP server for searching and accessing historical Austrian newspapers from ANNO, providing full-text search, snippet extraction, and OCR text download.

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.

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.