"Examples of MCPs (Microservices Communication Protocols) That Do Not Require API Keys" matching MCP servers:

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.

Provides access to the Library of Congress (loc.gov) data, enabling AI agents to search and retrieve information from the world's largest library.

Every other colour API tells you what goes together. Colour Memory tells you what it means, where the evidence ends, and what it must not claim. 47,515 hand-researched records, graded A–E, every result cited. 91 specialist tools built for agents that need precision, not guesses. Direct MCP: https://api.colourmemory.com/mcp — no signup, no key for the free tools (10 calls).

Enables AI agents to access and interact with the Sefaria database of Jewish texts, including retrieval, search, and related content.

An MCP server that enables AI assistants to search and retrieve anime figure data, collections, lists, and clubs from MyFigureCollection.net, including partner listings and barcode lookup.

Exposes studio profile and contact information for Symbols of Wealth Studio, enabling AI assistants to answer queries about creative studios in France, AI-powered content production, and premium brand content services.

Enables AI assistants to access South Korean tourism information via the official Korea Tourism Organization API, providing comprehensive search for attractions, events, food, and accommodations with multilingual support.

Write and mail personalized funny booklets via an AI agent. Allows agents to commission custom 16-page print gifts for users.

Japanese calendar API for AI agents. Provides Rokuyo, Rekichu, Eto, 24 Solar Terms, and fortune judgments. MCP + REST API.

A server that enables AI models to access Kakao Map features (place search, address lookup, route finding) and Daum search services (web, image, blog, cafe) through Model Context Protocol.

OAuth-protected FastMCP server exposing eight read-only public APIs (currency, weather, art, pets, dictionary, random images, vehicles) via MCP tools, with optional Gemini LLM-based routing for query selection.

Enables natural language search of the National Library of Israel's digital archive using Claude. Converts conversational queries into structured API calls for exploring cultural, historical, and literary assets.

The MCP server for Divine API's Indian Astrology services, allowing AI assistants to query Vedic astrology data such as Panchang, Kundli, and matchmaking through natural language.

An API that exposes Unsplash image search, listing, and random photo capabilities as MCP tools, enabling AI models like Claude to directly interact with Unsplash's services.

Enables AI agents to search The Met's open-access collection by keyword with filters for images, on-view status, medium, and year range, and to fetch rich object details such as artist bio, dimensions, department, and gallery number. Also lists the museum's curatorial departments so searches can be scoped, all without an API key.

Provides 32 JSON-RPC 2.0 stdio tools exposing PyJHora's Vedic astrology calculations, including panchanga, ephemeris, divisional charts, dasha timings, yogas, doshas, transits, and horoscope matching.

Enables searching and displaying high-quality, royalty-free photos from Pexels directly in ChatGPT conversations via an interactive gallery widget.

A Model-Client-Protocol server that enables users to search the Gallica digital library of the National Library of France and generate structured sequential research reports with formatted citations and relevant images.

Enables searching documents in Gallica, the digital library of the Bibliothèque nationale de France, and generating structured research reports with citations and images.

Enables AI models to search and retrieve bibliographic and digitized records from Swiss academic libraries (swisscovery, e-rara, e-periodica, e-manuscripta) via open protocols without requiring API keys.