MCP Servers 2,124

USPTO Patents

io.github.guptaprakhariitr/uspto-patents-mcp

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US patent search, assignee portfolios, and citation graph via PatentsView.

Freelancer Server

io.github.godesigntech/freelancer-mcp-server

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Search, bid, and message clients on Freelancer.com from Claude.

Shippost

io.github.RyanKramer/shippost-mcp

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Twitter/X tools for AI agents — read timelines, post tweets, search, and engage

Arxiv

io.github.pipeworx-io/arxiv

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arXiv MCP — preprint server search (free, no auth)

Reddit Buddy

io.github.karanb192/reddit-buddy-mcp

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Reddit MCP server - browse posts, search content, analyze users.

Rixot

io.github.mkrupkin/rixot-mcp

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Let AI agents buy dofollow backlinks: search 50,000+ vetted sites, order, publish.

Certindex

io.github.certindex/certindex-mcp

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Certificate Transparency search for AI agents: certs, subdomains, issuance history, expiry.

PERSONAIZER

io.github.PersonAIzer/mcp

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Free MCP API to create AI chat personas for websites — upload knowledge, search, and chat

Arxivsub

io.github.arxivsub/arxivsub-mcp

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Search arXiv and major AI/ML/CV/NLP/robotics conference papers and their related work.

Mrd

io.github.newspacemarket-com/mrd

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Spacecraft component specs from vendor datasheets: search, dumps, budgets

X Archive RAG

io.github.mameshivaa/x-archive-rag

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Local-first MCP tools for searching and drafting from your X/Twitter archive.

Skills Hub

io.github.tinh2/skills-hub

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Search & install 6,500+ AI agent skills from skills-hub.ai inside any MCP tool.

Tripadvisor

io.github.chrischall/tripadvisor-mcp

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TripAdvisor location search, details, photos, and reviews via the Terra API

Pod

io.github.Marvy101/pod

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Search and share firsthand reviews of products, APIs, services, places, and organizations.

Federal Regulations

io.github.stark256-spec/regulations-mcp

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Search the Federal Register, read & diff CFR sections, query Regulations.gov.

Duffel

io.github.pipeworx-io/duffel

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Duffel MCP — live flight search + pricing via the Duffel Flights API (duffel.com)

Open Call Portal

io.github.OpenCallPortal/open-call-portals

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Search PII-free opportunities, availability, and live events; prepare safe no-write form handoffs.

Secret MCP

io.github.yyeongjin/secret-mcp

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Local MCP server for isolated, evidence-backed GDWEB design analysis and web search.

Querido Diário (municipal)

io.github.mcp-dir/querido_diario-mcp

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Searches MUNICIPAL official gazettes from thousands of city halls (Querido Diário / Open Knowledge B

mcp-catalog

io.github.atomno-mcp/mcp-catalog

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Search MCP servers in the public mcp-catalog.ru directory.

Kiwiclaw Server

io.github.AmoghReddy45/kiwiclaw-mcp-server

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Search vetted OpenClaw skills and browse the ClawBoard forum via 14 MCP tools.

Tubescout

io.github.not0lucky/tubescout

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YouTube as a research engine: keyless search, video intel, resilient transcripts, demand signals.

Chiwawa — AI Agent Registry

io.github.manuelrmz123/chiwawa

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Search and discover AI agents across A2A and MCP protocols.

LayUp Sports Booking

io.github.LayUp-Sport/sports-booking

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Search bookable London courts, pitches, lanes and pickup games across every major UK provider.