Which remote MCP servers actually answer

USGS Volcano MCP — Volcano Hazards Program HANS-public feed (no auth)

USGS Water Services (NWIS) MCP.

Real-time water levels and flow rates from USGS stream gauges

Query real-time and historical USGS water data from ~8,000 stream gages and groundwater wells.

USGS Water MCP — wraps USGS National Water Information System (NWIS) REST services (free, no auth)

Utah state open data via Socrata SoQL — government, grants, health, demographics.

Paid Solana transaction diagnostics, simulation, fee estimates, and token risk analysis.

Solana transaction diagnosis, simulation, token-risk evidence, and priority fees via x402 USDC.

AI agents compare and sign up for Texas utility plans: electricity, internet, gas, water, trash.

7 utility tools: exchange rate, UUID, hash, Base64, timestamp, calculator, unit conversion.

UUID validation & generation MCP.

Generate UUIDs v4, v7, ULID, nanoid. Batch support. x402 micropayment.

AI-driven DFS lineup optimizer for MLB & NBA — build FanDuel & DraftKings lineups via MCP.

Cited geopolitical events, multi-perspective briefs, and live breaking news from V³ News.

VA facility locations, services, wait times, and satisfaction scores

Victoria and Albert Museum (V&A) Collections MCP.

Pay-per-call agent superpowers: media/video gen, product demos, research, GTM, scraping, compute.

Latvian law search: in-force statutes, verbatim articles, verified Q&A. Anonymous, read-only.

Get share links, publish and manage websites, artifacts and agents. No account needed.

MCP server for valet parking: 789 US operators across 31,186 cities. 7 tools. No auth.

Valida ICD-10-CM contra catalogo real FY2026 (NCHS/CDC) y CPT por estructura/categoria.

Resuelve satisfaccion real de rangos semver (^1.2.3, ~2.0) contra una version. Pago x402/USDC.

Deterministic validation for AI-generated artifacts: JSON Schema, OpenAPI response, SQL syntax.

Continuous website testing by Validoria — monitor security, SEO, performance, and accessibility.

Vehicle data from its plate or chassis, with the market value from the FIPE table. Platform-hosted,

VALORANT reference data MCP (valorant-api.com).

Оценка имущества ВАЛПРО (Москва): расчёт цены, услуги, документы, FAQ, заявка без ПД.

Verified deals, store policies & a trust score for thousands of online retailers. No auth.

EU AI Act Art-14 runtime oversight: allow / flag / gate-to-human on an agent action, with receipt.

Execution Control Layer for AI Agents. Cost limits, retries, ownership for paid APIs.

Legal research: US primary law, Indian case law (31M+ judgments), and citation graph traversal.

SEO research SaaS exposed as 30+ MCP tools. Forge niche analysis, plans, and writer-ready briefs.

Read-only MCP profile server: CV, case studies, claim-to-evidence map, and role matching.

Validate VAST, VMAP, and DAAST ad tags against IAB specs. 212 rules, pure Rust core.

VAT-number format validation MCP (EU + UK/CH/NO).

Validate EU, UK, AU VAT numbers for AI agents. EU ViDA e-invoicing compliance.

Remote MCP for VaultCrux Memory Core queries, snapshots, freshness, audits, and contradictions.

VaultCrux Platform — 60 tools: retrieval, proof, intel, economy, watch, org

Vealth work board: find real work, claim free with your wallet, prove it. Free onchain anchoring.

In-memory vector search with TF-IDF and cosine similarity. x402 micropayment.

Vedic kundli, panchang, dashas, nakshatras and KP charts for AI agents, one API key.

Hosted MCP with 78 agent tools: X, domains, SEO, Trends, YouTube, TikTok, screenshots, and more.

Vehicle data for AI: VIN decoder, automotive specs, stolen checks, valuation and way more.

Lists the vehicles linked to a CPF or CNPJ nationwide, from the document provided. Platform-hosted,

First MCP server to execute real AFIP/ARCA invoicing in Argentina — not just docs/search.

Argentina CUIT/CUIL validation and AFIP fiscal QR generation. Pure, no-auth MCP tools.

Screen a vendor, store, or group-buy for legitimacy: reputation, red flags, Reddit sentiment.

Vendor document & expiry tracking for septic operators — read-only live demo board tools.

Sourced data on 95+ frontier-industry companies: profiles, dated milestones, funding, daily news.

Preflight QA for AI-agent deliverables with structured verdicts and repair guidance.

Venture Insights' free Concept Diagnostic, requested by an AI assistant for a founder.

Booking decisions, scorecards, and self-checks for Florida food vendors over live DBPR data.

Verified directory for machine payments (x402 & MPP): check services and wallets before agents pay.

Judged, citation-checked policy corpus over MCP. Keyless public reads; API key for AI tools.

Verifiable cognition: any agent file to a deterministic content-addressed brain_id.

Get a real human to verify, decide, or improve an AI agent's work.

Verifies a person's identity in Argentina by matching the provided data (DNI, name, birth, address).

Vetoes the bugs only AI writes: invented APIs, mock 'success', false 'done', N+1s that pass tests.

Pay-per-call security verification for wallets, contracts, agents and apps, in USDC over x402.

Verified free-tier limits and commercial-use verdicts for 162 AI tools - sourced, dated, no-auth.

Verified discount & referral codes for crypto exchanges, cards and more — tested first-hand.

Contradiction-verified, freshness-SLA'd signed feed: per-record status + as-of date + receipt.

Website authority and AI visibility tools for DR, TrueDR, keywords, backlinks, and partnerships.

MCP tool observatory: do registry servers answer, and are their answers true? No key.

Conformité Factur-X : 21 critères PDF/A-3, XML CII EN 16931 et BR-FR. Analyse locale, gratuite.

Email verification for AI agents — verify, clean & validate emails; self-onboard + crypto pay

Independent ZARONIA coupon verification for SA FRNs & money-market paper, SARB-compounded index.

Cryptographic proof of wallet ownership in two steps, with no keys and no custody.

Runs your code against a contract; returns HELD or BROKE at the exact input. Deterministic.

Check if a real-world fact about a business, listing, or place can be verified. Free, no auth.

Real-time social media and prediction market integrity layer for traders, funds, and quant desks.

Agent-to-agent marketplace: AI agents list and buy data, services and compute. Signed receipts.

Unofficial read-only MCP server for VeryChic hotel offers

Vessel Tracking — live worldwide ship positions from AIS.

Earn up to 20% cashback on 200+ AI tool subscriptions. Browse, build stacks, get tracked links.

Find US veterinary specialists. Search clinics, read procedure articles, estimate costs.

Deterministic safety & cost gate that vets Postgres SQL before your AI agent runs it.

Will a local LLM run on your hardware? GGUF quant, buy-vs-rent-vs-API cost, used-GPU prices.

Agentic commerce network: discover sellers and products, negotiate, and pay USDC on Base via x402.

Travel and expenses of a Federal Executive public servant in the Transparency Portal from the CPF. P

Search Asia travel tours, browse guides, request quotes, find upcoming group departures.

Pay-per-use weather, environment, finance, and on-chain intelligence tools for AI agents via x402.

Deploy and host AI-built websites on EU infrastructure, straight from your AI agent.

Build, deploy, and operate hosted web apps on VibeKit (vibekit.bot) from any MCP client.

Search 13,000+ US vaccine court (VICP) decisions: cases, court text, statistics, attorneys. Free.

victorian-complaint MCP — wraps StupidAPIs (requires X-API-Key)

Official Viddler MCP: list videos, manage access control, pull proof-of-viewing analytics.

Video generation cost estimates across providers, with provenance, freshness, and confidence.

Videogames MCP — wraps Free-to-Play Games API (freetogame.com, free, no auth)

EU VIES VAT-number validation MCP (European Commission).

Date conversion between solar date (Gregorian calendar) to lunar date (Vietnamese calendar)

Factual sky for AIs: ISS, auroras, archives. Never confuses unexplained with extraterrestrial.

AI-powered Hong Kong SFC regulatory intelligence. Bilingual EN/ZH compliance queries.

Accuracy-first what's-on guide for Niagara-on-the-Lake: verified events, venues, search, planning.

Vila Buarque — neighborhood directory: local places, events, menus, offers, and services.

Vila Madalena — neighborhood directory: local places, events, menus, offers, and services.

Vila Mariana — neighborhood directory: local places, events, menus, offers, and services.

Instant private jet charter price estimates and confirmed live quotes, worldwide.

Vimeo public video/user/channel/category lookups. Free personal token.

Decodes US VINs and looks up open NHTSA safety recall campaigns for a vehicle.