Which remote MCP servers actually answer

OpenRouter Models MCP.

Routing, isochrones, matrix, snap, elevation, geocode via Openrouteservice.

OpenSea MCP — NFT marketplace data (v2 API)

openSenseMap MCP — citizen-science environmental sensor network (opensensemap.org)

Open, verified shop database for AI agents: products, offers, price comparison, trust and coupons.

OpenSky MCP — OpenSky Network API (free, no auth for anonymous access)

OpenStates MCP — bills, legislators, votes in all 50 US states

Search bills, legislators, committees, and events across all 50 US states, DC, and Puerto Rico.

Geocode, reverse geocode, and run Overpass spatial queries on OpenStreetMap data.

Swiss federal open data via MCP: TARES tariffs, FINMA registry, NOGA codes (9 tools).

Open Targets disease/target/drug knowledge graph (GraphQL)

Verifiable US tax oracle for AI agents: cited, machine-checkable federal and state tax computation

Open Topo Data — global elevation lookups (multiple DEM datasets)

OpenTopography global DEM rasters + point queries (free key)

Open Tree of Life MCP.

Zero-signup anonymous link-unfurl API. One GET returns clean JSON metadata for any public URL.

Vanlife & RV travel data — fuel prices, weather, currency, events, news (free, 11 MCP tools)

Openverse Creative-Commons image + audio search

Verify document authenticity for AI agents: detect tampering in PDFs and images with evidence.

Detect AI-generated text: the probability a document's prose was LLM-written, with the tells.

Verify a document's citations resolve and match, recheck its math, flag unsupported claims.

OpenWeather MCP — wraps the OpenWeatherMap API (openweathermap.org)

Zero-signup business-day date-math API: add days, count days between dates, is-business-day.

Look up a road freight transport operation registered with Brazil's ANTT by RNTRC and RENAVAM, confi

Read-only MCP server for the OPERANT AI operating-agent calibration benchmark.

Agent tools for the Ophis intent-based DEX: parse, quote, build, relay orders, look up fee tiers.

Discover Norwegian experiences & activities by county, category, weather, season and price.

Keyless Saskatchewan labour-market data: measured wages and rents, roles, jobs, outcomes, pathways.

Opsera AI Agent MCP server providing authenticated DevOps automation over SSE

Optionality — AI-judged options trading drill, Tollbooth-monetized MCP server

Unusual options activity on 7,000+ US stocks: top prints, streaks, IV rank, sentiment, sectors.

Free no-account URL security scan: 0-100 Launch Readiness score for any live site in ~15 seconds.

OQMD (Open Quantum Materials Database) MCP.

Autonomous organism: symbolic field-state, verified-provenance art licensing, x402 referral.

MCP tools: collectible price-fairness, recall safety, drop tracking, card grading, settlements.

Authoritative cited answers about saving family stories. Published by InkTree.

Cited Hermès price & resale market data as MCP tools, with attribution. Not affiliated.

Nonpartisan U.S. Congress data: bill decodes, rep lookup, bilingual EN/ES, read-only, no accounts.

MCP server for Orb — customers, subscriptions, invoices, usage and costs (usage-based billing).

162K words, 226K lessons, 21K assessments, knowledge graph. Deterministic JSON.

AI visibility checks, software recommendations and tool comparisons from measured AI answer data

Orbit Zürich: Workshop-Räume, Preise und freie Slots abfragen, Buchungsanfragen stellen.

Energy management platform — 61 tools for solar, battery, grid, and EV charging control

On-chain stablecoin market cap and Bitcoin institutional holdings data.

Read-only MCP server for the OrchestKit docs: full-text search + Markdown fetch. No auth.

ORCID public researcher records (works, employment, education)

Researcher profiles, works, affiliations, funding, and peer reviews from the ORCID registry.

Uniswap V3 pool liquidity depth analysis — price impact at 1/2/5/10% levels. x402.

Oregon DMV: live field-office wait times and office directory for all 60 offices

Oregon state open data via Socrata SoQL — agencies, business, health, environment.

OrganiKPI MCP: search and fetch services, posts and tools as clean markdown (read-only).

Agent orchestration + org memory via MCP. Manage initiatives and decisions from any client.

Official public read-only MCP server for Origine Paris, a Parisian fine jewellery house.

AI Agent information source discovery and direct access.

Celestia network intelligence for AI agents: daily analysis, anomaly signals and DA metrics.

Read-only scripture-study engine: complete-or-fail concordance over Greek NT, Hebrew OT, LXX.

Hosted speech-to-text + speech emotion/tone analysis for agents. No install; trial keys built in.

OSF (Open Science Framework, by the Center for Open Science) MCP.

Verifiable public-domain US gov & scientific data for AI agents. Pay-per-record via x402 USDC.

OSHA MCP — US workplace-safety standards (29 CFR Chapter XVII, parts 1900–1990).

Free AI-powered DXP tools by Oshyn: GEO & Reliability scan, Choose New DXP and Estimate DXP Budget.

Agent-ready US power data: capacity, generation, capacity factor (EIA), cited to source.

OSRM MCP — routing via the public demo server

OSV.dev (Open Source Vulnerabilities) MCP.

OSV.dev — Google's open-source vulnerability database

Query OSV.dev for package vulnerabilities and batch-audit dependency lists via MCP.

Where to watch X in Y? 30 Asian and Middle Eastern streaming markets, via Claude.

Live Robinhood Chain tokenized-stock data: basis vs NASDAQ, gaps, pools, whale flows.

Offline global aviation reference — airports, runways, navaids, frequencies from OurAirports.

Pay-per-call AI tools over x402: web research, summarization, structured extraction (USDC, Base).

Live status for 172 cloud and SaaS vendors from their official feeds. Is it you, or is it them?

Campground discovery, availability, planning, and booking handoffs across US public lands.

Outlook Calendar MCP Pack

Outlook Contacts (Microsoft 365) MCP Pack

Outlook Mail (Microsoft 365) MCP Pack

Identity resolution MCP server for phone/email lookups across 31+ services. Global + India coverage.

Maryland property-assessment fairness checks vs similar homes, with appeal windows and links.

data.overheid.nl MCP — the Netherlands national open-data portal (CKAN API).

OpenStreetMap Overpass MCP — programmatic queries against the OSM database

OWASP MCP — keyless.

OWID MCP — Our World in Data chart/indicator access (free, no auth)

Verified cross-platform implementations of Owl Group Trading indicators as queryable code.

Crypto structure scores, MemeSniper meme filter with real hit-rate, token & stock financials.

Oxylabs MCP — Oxylabs Web Scraper API (oxylabs.io)

Fetch and process content from specified URLs & sources using the Oxylabs Web Scraper API.

Oyez SCOTUS MCP.

Hyperliquid DEX data: prices, order books, candles, funding rates, portfolios. Pay-per-call, x402.

Pay-per-call Reddit agent: post reading, voting, commenting, DM and OAuth flows. x402, USDC on Base.

Pay-per-call SEO agent: keyword research, SERP analysis, on-page optimization. x402, USDC on Base.

npm, PyPI & crates.io intel for AI agents: versions, popularity, deps, health. No API keys.

x402-gated safety checker for npm/PyPI packages before you npm install / pip install.

Packagephobia MCP — install-size analysis for npm packages

Packagist MCP — PHP / Composer package registry

Live Packrift catalog: search, pricing, inventory, packaging recommendations, checkout URLs.

Compare parcel and letter delivery prices across 60+ carriers in 27 European countries.

Read-only padel.how racket catalogue: reviews, comparisons, brands, and methodology.

Stone's payments gateway (api.pagar.me), orders, charges (card, Pix, boleto), customers and cards, p

Connect your PagBank account to AI via Brazil's Open Finance: balances, statements, cards, investmen

URL to clean article markdown/text + metadata and links. Deterministic. $0.001/call via x402.

PagSeguro / PagBank payments, orders, charges (get, cancel, refund), checkouts and public key via th