MCP Server Directory

Uselessfacts MCP — wraps uselessfacts.jsph.pl API (free, no auth)

USGS Earthquake Catalog MCP (FDSNWS event API).

USGS MRData MCP — the Mineral Resources Data System (MRDS)

USGS The National Map (TNM) Access API MCP

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

USITC IDS (Investigations Database System, ids.usitc.gov) — the CASE

Next solar eclipse, eclipse times by place, Moon phases and seasons from the US Naval Observatory.

USPTO PTAB Trials MCP — wraps the USPTO Open Data Portal (ODP) PTAB Trials API

UUAID MCP server — give any AI agent a permanent identity and encrypted, quantum-ready memory that outlives the session. Mint a UUAID, save/recall memories, embed live trust badges, look up trust and the agent directory.

The body an agent asks before it acts: decide, approve, and keep a signed record on your machine.

Live VR, AR and XR news, full-text VR.org originals, an events calendar, headset deals and comparisons.

Send transactional email, authenticate sending domains, track delivery and diagnose deliverability, with scoped API keys and dry-run mode.

VAERS (Vaccine Adverse Event Reporting System) — report counts by vaccine,

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

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

Mermaid to assets. Source code to maps. MCP for agents.

Breaking-change diffs for npm packages, so coding agents avoid writing code against outdated APIs.

MCP server for Vedetta — pay-per-call crypto sentiment, divergence verdicts, and live analyst reads over x402 (USDC on Base). Descriptive market analysis only — not financial advice.

LinkedIn data for AI agents: search, profiles, companies, posts. Free key, self-minted, no signup.

MCP server for VeloCMS — draft, publish, and manage your blog (posts, media, comments, members) from Claude Code, Claude Desktop, Cursor, or any MCP client.

Vendor documentation and changelog change-tracking as ACCOUNT SIGNALS

Verifox MCP server — verify email deliverability and find business emails (single + bulk) for Claude and any MCP client.

Verify a SCITT receipt under a trust root you hold — offline, no backend, no key, no network

Fact-check any claim with live web sources. Ed25519-signed receipts. Catches hallucinations.

Veriphone MCP — wraps the Veriphone phone-validation API (veriphone.io)

Fail-closed trust gate for agents: fact-checking, prompt-injection detection, content moderation, PII and secret detection, and a pre-action guardrail.

Vermont Statutes Annotated — state statutes by citation.

Vessel Tracking — live worldwide ship positions from AIS.

VesselFinder MCP — wraps the VesselFinder AIS API (vesselfinder.com)

Give AI agents a wallet with a spending limit. Non-custodial USDC on Base, server-enforced limits.

German traffic, rail, parking, charging, fuel, address and weather data in your AI assistant - MCP, no API key. stdio bridge to the hosted ViaFrei MCP server.

Local safety layer for coding agents: deterministic risk checks, checkpoints and policy inspection, plus restoring files to their pre-session state.

Generate, edit and upscale AI video and images (Seedance, Veo, Kling, FLUX, Nano Banana) via VicSee.

victorian-complaint MCP — wraps StupidAPIs (keyless — no credential needed)

Search YouTube video transcripts and frames (slides, charts, on-screen text) and get matching moments with timestamped links and verified citations.

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

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

Code of Virginia — state statutes by citation.

VirusTotal MCP — file / URL / domain / IP reputation (BYO key)

Visa Requirements MCP — passport visa rules for any nationality → destination pair

A stdio MCP server exposing the VisiMark engine to agents: every command as a tool, the authoring discipline as resources, read-only unless an operator opens the write gate.

Visual Crossing Weather MCP — wraps the Visual Crossing Weather Timeline API

Estimate solar vitamin D synthesis: whether it happens now, minutes needed by Fitzpatrick skin type and viable months by latitude, using Open-Meteo UV data.

VizieR MCP — CDS astronomical catalogue access.

Japanese invoice/receipt OCR + tax registration-number (T-number) verification, via x402.

Read-only health checks for a local vLLM instance: liveness and real-completion tiers, GPU and VRAM status, service status and serve-flag introspection.

Clinical voice analysis MCP server — AVQI, DSI, jitter/shimmer, pronunciation assessment, and more.

Pay-per-call x402 speech generation on Base: multiple voices, personas and languages, speed and quality controls, OpenAI-style requests and batch audio.