Free MCP servers · page 153

Curated mTOR research: evidence-labelled studies, pathway claims with supporting/conflicting studies, open questions.

Free SEO and AI-visibility audits: scores, fixes, schema, robots.txt, redirects and 25-page site audits, no account.

Read a design system's component catalog and registry, and draw and certify charts from your own data.

wegotdocs/open-mcp

Turn a web API into an MCP server and add it to the open-source open-mcp.org registry.

Find and query official Brazilian economic data with provenance.

snaggle-ai/openapi-mcp-server

Connect to any HTTP/REST API server using an OpenAPI v3 spec.

Live crypto infra benchmarks: RPC latency, bridge fees, aggregator head lag, perp funding, with PromQL access.

Live jobs (Austin, TX and remote) and Austin-area local businesses, each with an Apply link or an Openpath inbox.

cyberdroid2077/opsecforge-tools/opsecforge-mcp

Local stdio server that keeps secrets out of coding-agent context: redact_file takes a path and returns only redacted content, scan_secrets checks staged changes before commit, plus offline webhook signature verification and JWT inspection. No network calls; optional Claude Code hook blocks direct .env/private-key reads. Redaction is heuristic.

vince-gonzalez/opticquiz-mcp

Color-vision accessibility: check palettes and images for colorblind safety, generate safe palettes, simulate color blindness and create Ishihara-style plates.

Perpetual futures on 40 venues, 21 prop firms' rules and prices, and SEC-sourced theses on 6,100+ US stocks.

US equity-comp tax math: ISO/AMT exercise plans, RSU and NSO sell-or-hold, QSBS, hedges, cash-goal sell plans.

agentic-mcp-tools/owlex

AI council: query CLI agents (Claude Code, Codex, Gemini and OpenCode) in parallel with deliberation rounds.

Cited home water treatment answers: diagnose a water problem, size a softener, and match replacement parts.

Search and compare padel rackets by published specs, each spec linked to its source.

Curated app, web and mini program palettes with measured WCAG contrast and CSS variables.

baruchiro/paperless-mcp

An MCP server for interacting with a Paperless-NGX API server. This server provides tools for managing documents, tags, correspondents, and document types in your Paperless-NGX instance.

Research paper search with citations from OpenAlex, Semantic Scholar, PubMed, Crossref and arXiv.

Free search of people, companies and open roles on an open professional network.

Rooms where AI agents of any vendor talk to each other; a room is a URL, readable by anyone with the link.

Search and fetch 21k+ verified KiCad parts with symbol, footprint and 3D model for PCB design; CC-BY-4.0.

US patent search and prior art lookup that returns only records the patent office returned; not legal advice.

Prices, 24h volume, movers and results for prediction markets on Polymarket, Kalshi and six more venues.

steipete/Peekaboo

a macOS-only MCP server that enables AI agents to capture screenshots of applications, or the entire system.

Search 1.8M+ live Brazilian used-car and motorcycle listings with FIPE prices, price ranges and cheapest states.

Peptide research profiles with evidence by study type, comparisons, educational search and unit math.

Convene a panel of expert AI personas to debate a decision from every side; debates need a Pro key.

yusong652/pfc-mcp

ITASCA PFC discrete element simulation: browse documentation, execute scripts, capture plots and manage long-running tasks via a bridge to the PFC GUI.

baba786/phabricator-mcp-server

Interacting with Phabricator API

Guideline-cited lab-results analysis for chronic conditions; flags missing or overdue tests with citations.

Public phishing-domain feed: check a domain, search detections by brand, and pivot on campaigns and certs.

Photo Mosaic & AI Collage Maker - Collager.ai

Turn your own photos into a photo mosaic or a heart, number or word photo collage with a preview in seconds.

Compare 152 reviewed pickleball paddles by score and specs, with purchase links.

AIDC-AI/Pixelle-MCP

Omnimodal AIGC framework that turns ComfyUI workflows into MCP tools without code, for text, image, sound and video generation, with a Chainlit web interface.

Automata-Labs-team/MCP-Server-Playwright

Browser automation using Playwright.

Move into a little house on a floating island: chores on a UTC clock, neighbours, and a postcard for your human.

List, search and inspect copy-in Angular + Tailwind components for coding agents.

GTO poker solver data: NLHE/PLO preflop ranges, postflop strategy, EV. 6-max NL preflop free.

pollinations/model-context-protocol

Multimodal MCP server for generating images, audio, and text with no authentication required

PoloPan Fashion MCP

Shop fashion: break an outfit photo into items, get in-stock looks for an occasion and check out.

Multilingual prompt workspace with 1,000+ templates in 35 languages, Compare Mode, and BYOM.

gridhra/port-keeper-mcp

Leases development port blocks to each clone or git worktree, writes .env files and resolves service names to URLs so parallel agents get their own ports.

Free, no-signup IoT sensor store: get a device name, read readings and history, wait for a flashed board to report.

Search a human-reviewed directory of free tools and projects, including AI agent tooling, or suggest a new one.

Blackman99/postsleuth

Postfix delivery troubleshooting: queue grouped by deferral reason, qshape, mail log stats and traces, SPF/DKIM/DMARC/PTR checks. Read-only by default; requeue/flush/delete need an opt-in flag.

Write a native post per network from one idea and publish it to TikTok, Instagram, YouTube and more; tools need OAuth.

Bourbon and American whiskey catalog: search, compare, and find similar or cheaper bottles.

Powietrze PL (powietrze-mcp)

Air quality in Poland: live GIOŚ measurements (PM2.5, PM10, NO2, O3), smog warnings, 3-day forecast and pollen.