Browse all Model Context Protocol servers with quality scores, stars, languages and maintenance activity.
Pre-build reality check for AI coding agents. Scans GitHub, Hacker News, npm, PyPI, and Product Hunt to detect existing competition before building, returning a reality signal score (0-100), duplicate likelihood, similar projects, and pivot hints.
Natural-language patent and scientific literature search across 200M+ patents and 216M+ papers from 170+ jurisdictions, with semantic/BM25 search, structured filters, and record retrieval. Hosted Streamable HTTP endpoint and Dockerized stdio bridge; requires a free Patsnap API key.
MCP server for [ITASCA PFC](https://www.itascacg.com/software/pfc) discrete element simulation — browse documentation, execute scripts, capture plots, and manage long-running tasks via a WebSocket bridge to the PFC GUI.
Research workspace MCP integrating Zotero, Obsidian, and NotebookLM. Search papers (arXiv/Semantic Scholar/PubMed/CrossRef), ingest into Zotero, sync notes to Obsidian, verify NotebookLM briefs. All three external tools optional. `pip install research-hub-pipeline` then `research-hub serve`.
Deep research MCP server for OpenAI Responses API or Open Deep Research (smolagents), with web search and code interpreter support.
Evidence-backed web research for AI agents. Real-time search with cited claims, confidence scores, and compare mode (raw LLM vs evidence-backed). MCP server, REST API, and Python SDK.
Cinema-quality science visualization MCP server for CFD/FEA/SPH. 22 tools for rendering, slicing, contouring, volume rendering, and animating OpenFOAM/VTK/CGNS data. Headless EGL/OSMesa.
Search and cite rare historical texts (alchemy, Hermeticism, Renaissance philosophy) with DOI-backed academic citations from [Source Library](https://sourcelibrary.org)
Semantic Scholar MCP server: 14 typed tools over 200M+ academic papers — search, paper/author retrieval, citation-graph traversal, and recommendations. `uvx s2-mcp-server`
MCP server for [YADE](https://yade-dem.org/) — open-source discrete element method (DEM) engine for granular and particle simulation. Browse API docs with BM25 search, execute code via synchronous REPL or async background tasks, monitor progress, and review task history.
Semantic search over 600k+ CS/AI papers with citation-graph traversal, full-text extraction, embeddings, and BibTeX export. Works anonymously or with a free key. Install: `npx scholar-feed-mcp init`.
Resolve any scholarly identifier (DOI, PMID, PMCID, ISBN, arXiv, ISSN, ADS bibcode, WHO IRIS URL) into structured CSL JSON, format in 10,000+ citation styles, or export to BibTeX/RIS/EndNote/Zotero RDF/CSV. Single or batch. Install: `npx -y scholar-sidekick-mcp`.
Search, cite, and compare the Pāli Canon (Tipiṭaka) — full coverage at parity with SuttaCentral (~444K segments across Sutta, Vinaya, Abhidhamma). Hybrid trigram+vector search, full-sutta fetch with cross-reference URLs (SuttaCentral + 84000.org), segment-aligned translation comparison, and Pāli word lookup against the P. A. Payutto dictionary. Free, non-commercial — offered as Dhamma Dāna. Hosted
Auditable strategic-risk memos for AI agents — sanctions, regulatory, geopolitics, trade. Geography-routed regional specialists (Central Asia/Caspian, Gulf/Middle East), per-claim evidence discipline, schema-validated output, machine-verified audit. No live data retrieval. PyPI: `agenda-intelligence-md`.
Philippine government data as agent-callable tools: PHIVOLCS earthquakes + volcano alerts, PAGASA weather + typhoons, PhilGEPS procurement, PSA 2020 Census population + poverty, AQICN air quality. Install: `uvx ph-civic-data-mcp`.
Search and fetch research datasets across Zenodo, DataCite (Dryad/Figshare/Dataverse/OSF), NCBI omics (GEO/SRA/BioProject), and literature (PubMed/OpenAIRE) behind one normalized model — DOI deduplication, NCBI-Taxonomy synonym expansion, paper→data linking, and checksum-verified download. `uvx data-aggregator-mcp`.
Zotero MCP server (`zotio-mcp`) with a capability-tagged tool registry and preview-first, journaled writes (an agent can't silently mutate or delete your library). Reads work keyless against the local Zotero desktop API; writes route to the Web API. Ships an MCPB bundle for one-click Claude Desktop install.
Evidence-grounded web research for AI agents. Verifies page-local claims with citations, confidence bands, policy reports, and multi-page session synthesis via MCP.
Access legislative data from all 50 US states and Congress — search bills, get full text, track votes, and look up legislators via the LegiScan API.
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.
MCP server for patent search and prior art discovery powered by Google Patents public dataset on BigQuery. Tools: search patents, get full patent details with CPC codes and citations, fetch legal claims text. Free to use.
Independent trust scores, claim audits, and comparisons for AI agents — queryable by your agent over MCP. Hosted Cloudflare Worker at hlido.eu/mcp (no install). Returns a 0–100 score, tier verdict, per-claim PASS/FAIL audit, and signed evidence for a reviewed agent. From [Hlido](https://hlido.eu).
Read-only MCP server and live-map dataset for declassified U.S. federal UAP/UFO records, with searchable records, hotspots, timelines and direct source links.
Query 9 classical Chinese texts (pre-Qin to Wei-Jin: 史记/汉书/后汉书/三国志/左传/论语/孟子/吕氏春秋/资治通鉴) by event, person, modern place name, or virtue — every result cites 【book · chapter · paragraph】 with original-text evidence and an honest `review_status`. Zero-dependency stdlib stdio JSON-RPC.
MCP server for US immigration guidance — live Visa Bulletin, priority date checker and immigration term explanations. Free to use.
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
Query real, quality-scored humans as an agent tool. [GetABrain](https://getabrain.ai) routes a question to paid human workers and returns schema-validated JSON — 16 response types (yes/no, ratings, rankings, A/B tests, sentiment, image/video/audio review, voice/video/photo capture). Fully programmatic signup with a $5 free trial credit, no card required. `npx -y @getabrain/mcp-server`.
French election results from 1999 to 2026 at polling-station level (55 elections), cross-referenced with INSEE socio-demographic data, elected representatives and official administrative boundaries. Electoral maps, vote-reserve analysis, cross-election panels and read-only SQL over DuckDB. Hosted, no auth, no install: `https://mcp.andre.vote/mcp`, also listed as a [hosted connector on Glama](https
Academic peer-review and research workflow tools from [Science AI Journal](https://scienceaijournal.com): Pre-Check (paper-tier prediction), AI multi-agent peer review, Research Gaps Finder, Journal Recommender (1,214 venues with predatory-journal flags), Duplicate Publication Checker (CrossRef/arXiv/medRxiv/bioRxiv/Unpaywall/900k-paper library), and the Article Writer pipeline. Free local tools (
Register LLMs/agents and submit research papers (Markdown) to the [BenchClaw](https://www.p2pclaw.com/app/benchmark) leaderboard. Papers are scored by a 17-judge Tribunal with 8 deception detectors across 10 dimensions. No API key required. Works with Claude Desktop, Cursor, Cline, Zed, Continue.dev.
Search 474 validated startup gaps from your AI editor. Find unsolved business problems by industry, role, or keyword — each with pain point, solution direction, and link to full blueprint. Zero API keys, works offline.
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`.
Instantly understand what real users think and why by querying our network of 1:1 Digital Twins - each representing a real person. Give your AI agents authentic human context to ground outputs, improve creative, and make smarter decisions.
Conduct AI-powered qualitative research interviews and surveys at scale with [Agent Interviews](https://agentinterviews.com). Create interviewers, manage research projects, recruit participants, and analyze interview data through MCP.