Browse all Model Context Protocol servers with quality scores, stars, languages and maintenance activity.
Send research papers from Claude to a Kindle or Kobo, with Zotero as the source of truth. Searches arXiv and OpenAlex, recommends related work via the Semantic Scholar citation graph, queues papers in a Zotero collection, and delivers the PDFs by email or Dropbox. Receipts report file sizes and name anything that could not be sent.
AI-analyzed startup & product opportunities mined from Reddit, Hacker News, Product Hunt & Stack Exchange. Query pain points, trending themes, and commercial scores (pain intensity, willingness-to-pay, build difficulty). Remote hosted MCP at painspotter.ai — free tier covers overview + opportunity detail; Pro unlocks search, trending themes & theme-level market signals.
Chemistry toolbox computed from authoritative data: molecular weight / molar mass of any formula (nested groups, isotope labels, propagated NIST uncertainties, percent composition), isotope-distribution mass spectra (m/z peaks for a given charge), and name⇆formula lookup with isomer resolution. Element masses from the NIST Atomic Weights and Isotopic Compositions database; offline and deterministi
Patent prior art search and startup IP intelligence for AI founders. Clone risk score, defensibility map, patentable features, competitor patent landscape — free analysis in ~2 minutes. Full IP Portfolio Package (6 documents) available for $99. `pip install fittin-mcp`
MCP server for [SPARKIT](https://sparkit.science), a scientific research agent that searches the literature, reads papers, and returns cited Markdown reports. Submit a question via the `research` tool from Claude Desktop / Cursor / Claude Code; get back a ~90-second cited report without leaving the chat. `uv tool install sparkit-mcp` or `pip install sparkit-mcp`.