MCP server directory

Full-text search of the Library of Congress's digitised American newspapers, plus catalogue search per media type and the curated collections. No API key. `npx -y mcp-libraryofcongress`

Clinical audit of Glooko diabetes data (any pump/CGM combination, not just one) inside Claude Desktop: time in range, GMI, trends, enriched bolus/basal analysis, and a device-agnostic capability-discovery architecture that adapts its tool list to whatever your own devices actually report. Ships as a Claude Desktop extension (`.mcpb`).

Turnkey on-premise private Agentic AI systems by [ARADIA](https://aradia.com) on dedicated NVIDIA DGX hardware (Spark, Station, B200) with zero cloud data leakage. Operating since 1991, six tools cover hardware sizing (`query_hardware_specs`), CapEx token ROI payback modeling (`calculate_roi`), autonomous affiliate onboarding to earn 10% bounties (`onboard_partner`), and machine procurement via BTCPay Server (BTC/LN/USDT) or Stripe MPP Fiat (`execute_procurement_order`), plus `track_order_status` and `query_partner_stats`. Listed on the official MCP Registry (`com.aradia/sovereign-hardware`). Remote Streamable HTTP / SSE at `https://aradia.com/api/mcp` or `https://aradia.com/api/a2a/mcp-endpoint.php`.

B2B company address data for the DACH region: search 6,400+ industry lists, check availability and field coverage, get binding price quotes.

Deterministic, non-generative image editing for agents: straighten, crop, mask, layer, apply LUTs, strip EXIF/GPS, and encode to WebP/AVIF/JPEG/PNG through declarative transform recipes. Originals are never modified, every result is an immutable revision with full lineage, and the same recipe reproduces byte-identical output on any machine. `npx -y atx-mcp --workspace /path/to/asset-workspace`

Hosted multi-tenant support-desk MCP; AI agents run tickets over MCP and pay per action in USDC (x402) across six chains, or create and run their own bounty board (the paying wallet owns it); remote streamable-HTTP, no account.

Portkey Admin API control-plane MCP server with 181 tools across 20 domains, including prompts, configs, keys, analytics, guardrails, integrations, and deployments.

Publish what an agent just wrote to a live HTTPS URL. Three tools: `publish_files` for pages written in the chat, `publish_dir` for a folder on disk, and `list_sites`. Static hosting on Cloudflare's edge, so no git, no build step and no repository. `npx -y @drop2run/mcp`

Reads the Claude Code, Codex and OpenCode usage logs already on your machine: token totals, per-day and per-hour activity, per-agent and per-model breakdown, and a year-in-review recap. Makes no network request — a test fails if any source file can open a socket. `npx -y @tokenchit/mcp`

Comprehensive SEO, AEO (Google AI Overviews, Perplexity), GEO, Local SEO, and CRO growth auditor with framework-aware surgical code fixes, multi-page sitemap crawling, HTTP security headers inspection (HSTS, CSP), and universal WebMCP multi-language support.

Drive FreeCAD from an agent: 280+ tools for parametric CAD, TechDraw drawings with GD&T, CalculiX FEM, and CFD/thermal/EM/multiphysics simulation. Requires a local FreeCAD 1.1.

Art-directed website prompts as slash commands: hero sections, landing pages, SaaS, portfolio, e-commerce and 3D/WebGL scenes. Every build is registered as a real MCP prompt, so it lands in the command palette instead of waiting for the model to think of it, and is written natively for the tool you are in (Lovable, Bolt, Cursor or Claude). Each one has a live demo you can scroll before spending a token. Free prompts need no account; sign in from the session to unlock the rest. Install via NPM: `npx -y nightmarquee`

Local memory for coding agents that can refuse, not only recall. A rule carrying a machine-checkable proof blocks the matching command before it runs; prose-only rules can warn but never block. Append-only event log, per-project scoping, and a health report that names the facts whose anchor has rotted. No account, no API key, no cloud.

Generate quality control plans and inspection reports from technical-drawing PDFs — tolerances, fits, threads, GD&T and surface finishes extracted automatically, balloon numbering with acceptance limits, ballooned drawing PDF and Excel measurement report. Install via NPM: `npx -y quality-control-plan-mcp`

Web page data for agents: scrape to Markdown, extract metadata, links and JSON-LD schema, audit on-page SEO, detect tech stacks, and validate XML sitemaps. Free tier, no card. Install via `npx -y @tooltrace/mcp-server`, or use the hosted endpoint at `https://mcp.tooltrace.io/mcp`.

Governed managed-endpoint fleet operations (thin-client/VDI) — login-storm and patch/config-drift analysis, inventory, and guardrailed remediation (13 tools) with unbypassable audit logging (MCP + CLI), budget/runaway guards, and undo/rollback.

Official CHAP Coordinator MCP server for auditable human-agent collaboration: approvals, overrides, handoffs, escalations, and hash-linked evidence. Run locally with `npx -y @brightbeamai/chap-coordinator-mcp`.

Official server for [cogDepot](https://cogdepot.com), an anonymous broker where agents publish capability listings, negotiate terms, and form direct peer-to-peer deals backed by escrow and two-sided reputation. Five tools need no account at all - what the broker does and what it costs, how to get a key, a preview of the live board, any agent's public reputation record, and the marketplace's aggregate stats; with a key, read balance and escrow holds, negotiation threads, sealed deals and their reveal packages, and rate a counterparty. Prices come from the live discovery document at call time rather than being baked into the package, and an unreachable API is reported as stale rather than answered from a snapshot silently. Install via `npx -y @cogdepot/mcp-server`.

Official hosted MCP server with an open-source stdio bridge for evidence-backed business discovery and lead-list research. Search by plain-language brief or structured criteria, inspect qualification evidence and exclusions, and use resumable jobs with cursor paging and export support.

Solar vitamin D: whether the sun where you are can make vitamin D right now, how many minutes your Fitzpatrick skin type needs for a target dose, which months of the year synthesis is possible at your latitude, and how much a sun session produced. Computed from solar geometry, a clear-sky UV model with ozone and altitude, and live Open-Meteo UV data. `npx vitamind-mcp`

Rent GPUs, robots, drones, and construction equipment on RIGShare, and onboard equipment owners; agents can quote, book, run remote sessions, and publish listings.

Human-in-the-loop over MCP elicitation: `elicit_confirm` (OK/Cancel) and `elicit_form` (typed fields from your JSON schema) raise native dialogs in the connected host, and `elicit_doctor` reports which elicitation features the host actually supports. Local stdio via `npx -y elicitly`.

Persistent agent memory with a first-class correction channel: supersede or revert a fact so recall stops returning the stale value, an echo guard that blocks a restated old value from resurrecting it, and receipted erasure (a signed, content-free tombstone that makes a deletion provable). No LLM on the write path, zero dependencies, the core in one file, 73 MCP tools. `uvx --from "inspeximus[mcp]" inspeximus-mcp`

MCP server for ICTPBX, a multi-tenant IP PBX built on ICTCore and FreeSWITCH. Reports PBX statistics and lists extensions, DIDs, providers and tenants over the ICTCore REST API. Entirely read-only: there are no write tools to gate, so it cannot change PBX configuration at all. Zero-install via `npx -y ictpbx-mcp`.

Manage dozens of SQL Server instances from one config file, grouped by client or environment and hot-reloaded, with execution plans, index audits and stored-procedure analysis

Screen the counterparty of an x402 payment before an agent pays it. One tool, `screen_payment`, runs deterministic checks — address sanity, dynamic-`payTo` swap detection, transport safety and your own spend policy — and returns `allow`/`review`/`block` with the reasons for the verdict. Advisory: it never holds funds, and your code decides. Runs entirely on your machine by default with no key, no account and no network call (MIT, 5 packages installed); set `FRISK_API_KEY` to answer the same tool from the hosted reputation graph instead. `npx frisk-mcp`

Model Context Protocol server exposing verified public data scrapers and lead extractors for Google Maps, Glassdoor, SEC EDGAR, and state contractor registries. Run locally via Python stdio.

Zero-API-key serverless form backend, lead triage, and instant contact form generator for static sites, React, and JAMstack apps. Install with `npx -y sounnyforms-mcp`.

Returns the decision records still in force for the path an agent is about to edit: constraints, already-ruled-out alternatives, and warnings, stored as ordinary git trailers and notes, with superseded and expired records filtered out.

Persistent memory with three swappable storage backends (Postgres/pgvector, Qdrant, Neo4j) behind one interface, benchmarked head-to-head for latency, not just claimed interchangeable. Retrieval weighting adapts per user via epsilon-greedy over real outcome feedback instead of a fixed formula. Reflection merges near-duplicate facts and decays/archives stale ones, audit-logged, never hard-deleted. Real before/after MCP eval: +60% answer accuracy with memory vs. without. `git clone` + `uv sync` (not yet on PyPI).

Generate AI images and videos, browse models, estimate credit costs and track tasks from Cursor, Claude or Codex. MIT-licensed stdio client. Requires Node.js 22+, macOS or Linux, and an active paid Wan27 subscription. First run wan27 auth login. Docs: https://wan2-7.io/mcp/ . Repository: https://github.com/NotUsingGithub/wan27-mcp

Safe-by-default control of a Mac: read files, list processes & apps, take screenshots, read the clipboard; and behind explicit opt-ins, run shell commands (allowlisted), AppleScript, move files to Trash, and inject GUI input. Read-only by default with layered access modes, per-path/command allowlists, and human confirmation (MCP elicitation) on the dangerous calls. `npx -y @dockndevai/mcp-macos`

End-of-day US equity technical data: how far each S&P 500 / Nasdaq 100 name has strayed from its own 200-day average, what share of the universe currently sits above it, and the chart patterns from each night's scan carried with their historical win-rate against SPY. Tool descriptions state their own caveats — data is end-of-day, never intraday, and a bucket win-rate is a property of hundreds of past signals rather than a probability for the next one. Free tier needs no card. On the official MCP Registry as `io.github.xsf0221/pattern-vista`. `uvx --from 'pattern-vista[mcp]' pattern-vista-mcp`

A meta-tool that reads other AIops tools' audit trails and seals framework-mapped (HIPAA/PCI-DSS/SOC 2/GDPR) hash-chained evidence bundles — deterministic, offline, and tamper-evident (19 tools) with unbypassable audit logging (MCP + CLI), budget/runaway guards.