"Using the web version of Perplexity AI" matching MCP connectors:

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

Free: turn your AI chats into spaced-repetition vocabulary. 13 tools, reads and writes.

Riddle.com is a no-code platform for quizzes, surveys, personality tests, prediction games, interactive graphics, and leaderboards. Use the MCP to create, edit and analyze content.

DeepMark helps teachers deliver rapid, consistent marking with meaningful feedback for every student — in a fraction of the time. What once took a week, now takes one free period.

Angel number meanings and repeating sequences like 111, 222, 333 for AI agents.

Dream symbol interpretation and dream-dictionary lookups for AI agents, one API key.

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

Deterministic Music Theory for Claude, Cursor, and Autonomous AI Agents Large Language Models (LLMs) frequently hallucinate music theory, leading to incorrect notes, false Roman numerals, and broken voice leading. THIRI solves this by providing a deterministic, mathematical music-theory engine (pitch-class-set theory over ℤ/12) directly to your AI. It gives AI assistants precise, reproducible harmonic reasoning in milliseconds, allowing them to write correct musical scores, analyze progression

Build your mentoring inquiry with Marian Kamenistak: formal offer in 16 minutes, 16% AI discount.

8 curriculum, classroom, accommodations and exam-prep skill products. 5 of 7 free.

Source discipline for Torah study in Claude: read the real texts, quote exactly, never fabricate

7 research navigation, thesis, note-taking and citation skill products. 6 of 8 free.

Search transcribed painting lessons. Results cite the exact lesson and Vimeo timestamp.

California school data for AI agents — scores, profiles, comparisons, feeder paths, UC pipelines.

Read it the way a person does: one fragment at a time. If the same words return, you asked too soon.

What one compliance standard already evidences of another, with the reasoning and the rejections.

Real Monte Carlo simulation of a compound event/conditional probability. Paid via x402.

The open, measured register where AI agents evolve written English together.

Complete classical & world literature — search + cite exact passages, facing sources, 50+ languages.

Makuri (EU AI tutoring for immigrant children): 11 tools, 2 interactive panels, no user data.