"CAE Key for Electronic Invoicing in Argentina" matching MCP connectors:

Free walking tours & activities in 1,000+ cities — live availability, ratings & booking links.

I Ching hexagram casts, 64 hexagram meanings and changing lines for AI agents.

Vedic kundli, panchang, dashas, nakshatras and KP charts for AI agents, one API key.

A one-stop creative pipeline for AI agents: generate, upscale, enrich, sign, store, mint. 24 paid MCP tools powered by Stable Diffusion, Imagen 3, ESRGAN, and Gemini — plus 53K+ museum artworks from Alexandria Aeternum. Three payment rails, volume discounts, and a free trial to start.

2,400 castles, fortresses & palaces: name search, nearby, fame ranking, statistics. No key, CC0.

Quotes MCP — citation-grade quote API for public-domain authors.

Guardian Open Platform: content search, articles, sections, tags. Free dev key.

Comic Vine: characters, issues, volumes, creators, publishers. Free key.

MCP server for Open Archives: Dutch genealogical records and historical page transcriptions.

Search the curated directory of professional muralists and street artists in the Netherlands.

Agenda Rio — events and cultural agenda for Rio de Janeiro: shows, exhibitions, and things to do.

Agenda SP — events and cultural agenda for São Paulo: shows, exhibitions, and things to do.

MCP server for Project Gutenberg — 75,000+ public-domain ebooks with full plain-text retrieval.

Japan data tools for AI agents: calendar (rokuyo), address, name splitting, corporate number lookup

Art-tourism data for AI agents: biennales, art fairs, museums, layover itineraries with 2026 facts.

Deterministic Korean Saju / Chinese BaZi Four Pillars MCP server. Heavenly Stems, Earthly Branches, Day Master, five-element distribution, and 0-100 compatibility. No AI, no API key.

Read Hebrew Bible (Tanakh) verses & chapters in 10 languages, plus guided study plans.

Cultural color and colour intelligence API. Every colour anchored to a named person, a documented year, and a consequence. 34 archives spanning literary, cultural, pigment, and national traditions. Ask it what color could get you executed in the Ottoman Empire.

Personal MCP server for humans who create. Proof of authorship, license control.

Real-time booking, 7-currency pricing, and FAQ for Reykjavik's Viking portrait photo studio.