"protocols.io" matching MCP connectors:

Federated search of books and papers, BibTeX/RIS citations, open-access retrieval and reading.

UNESCO Institute for Statistics (UIS) MCP — keyless.

Education Feeds MCP.

DOAJ MCP — Directory of Open Access Journals

Sefaria MCP — the free digital library of Jewish texts.

Universities MCP — Hipolabs Universities API (free, no auth)

Wiktionary MCP — multilingual dictionary via Wikimedia REST + MediaWiki Action API

Codeforces competitive programming users, contests, problems

Wordnik English dictionary: definitions, examples, related words, WotD.

Browser-based VR public speaking training with AI feedback. No headset required. Six MCP tools: list pricing plans, 3D practice environments, audience use cases, competitor comparison, FAQs, and quick-start guide.

Jisho.org Japanese-English dictionary MCP (keyless).

Quran MCP — Al-Quran Cloud API.

Merriam-Webster MCP — wraps the Merriam-Webster Collegiate Dictionary and

PoetryDB MCP.

Codewars user profiles, completed kata, authored kata, kata detail. Keyless.

LeetCode public profiles, solved counts, daily question, problem detail.

Certifier MCPBOAuth

Official MCP server for Certifier to issue, manage, and track certificates and badges.

slide-deck.ioA

Public remixable decks from a topic. Control.io product of Morton Technology Consulting, LLC.

uxspot-mcpA

uxspot.io UX reference: glossary, AI x UX tools directory, checklists and Learn UX curriculum

Open Library MCP — Internet Archive's open book metadata