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mcpindex

Official registry Other

The MCP server index that vets servers, not just lists them. Advisory screen before you install.

Source code Website Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http mcpindex 'https://mcpindex.ai/api/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "mcpindex": {
            "type": "http",
            "url": "https://mcpindex.ai/api/mcp"
        }
    }
}
NPM package mcp-server-mcpindex
Claude Code 
claude mcp add mcpindex -- npx -y mcp-server-mcpindex@0.4.0
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "mcpindex": {
            "command": "npx",
            "args": [
                "-y",
                "mcp-server-mcpindex@0.4.0"
            ]
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. mcpindex.ai
  2. What you get
  3. Develop
  4. Stack
  5. Project layout
  6. License
  7. Affiliation

mcpindex.ai

The in-path trust gate for agent tool calls.

MCP tool contracts can change remotely with no version bump. mcpindex pins each contract and HOLDs the call when it drifts — before your agent acts. Deterministic contract-diff on your host. Zero credential custody. Not a safety oracle.

Live site · Install gate · npx mcp-server-mcpindex · pip install mcpindex-gate · Remote MCP · Docs · Trust · Methodology

What you get

  1. In-path drift gate — one command wires Claude Desktop / Claude Code / Cursor / Gemini CLI / Cline / Zed so each MCP server launches behind the gate. Local and fail-closed; the wired proxy sends nothing unless you opt into drift telemetry, and the Python SDK wrapper posts a credential-blind receipt per call by default.
    curl -fsSL https://mcpindex.ai/install.sh | sh (inspect first with | less) · PyPI: mcpindex-gate
  2. Advisory directory — search, recommend, preflight (/api/v1/preflight), and trust lookups over HTTP or as a drop-in MCP server (mcp-server-mcpindex). Screen verdicts are REVIEW / UNVERIFIED at v1; ALLOW / DENY are reserved in the contract.
  3. Agent-readable surfaces — /llms.txt, /.well-known/mcp-index.json, JSON-LD, and a per-server page for every indexed server (live count at mcpindex.ai/stats).

The gate is the wedge. The directory is the corpus the gate can query — also free.

Develop

Canonical local path: /Volumes/GB990Pro/GBCode/mcpindex-web.
If you also have mcpindex-STALE-DO-NOT-DEPLOY/ (or an old mcpindex/ clone), ignore it — it is a blocked backup, not the live site.

npm install
node scripts/sync-registry.mjs     # pull the registry: snapshot + removals + slug map
npm run dev                         # http://localhost:3000

Snapshot lives at data/snapshot.json (committed). Refresh anytime with the script.

Stack

  • Next.js 16 (App Router) on Vercel
  • Tailwind v4
  • Local snapshot of registry.modelcontextprotocol.io/v0/servers, refreshed daily via Vercel cron
  • Quality Score: lib/quality.ts (open methodology - PRs welcome)
  • Search: lib/search.ts (keyword now; embeddings v2 when OPENAI_API_KEY is wired)

Project layout

mcpindex/
├── app/                    # Next.js routes
│   ├── api/v1/             # Versioned public API
│   ├── api/cron/           # Vercel-cron-driven endpoints
│   ├── server/[slug]/      # per-server pages (top-N SSG + ISR)
│   ├── best/[category]/    # curated category pages
│   └── ...                 # docs, trust, methodology, ledger, …
├── components/             # Header, Footer, DriftGateDemo, LiveTicker, …
├── lib/                    # registry, quality, search, verdicts, installs, …
├── scripts/                # sync-registry.mjs, build-slugmap.ts, honesty guard
├── data/                   # snapshot.json (committed) + snapshots/ (cron-written)
├── mcp-server-mcpindex/    # the npm-distributed MCP directory client
└── …

License

  • Web app code: source-available, all-rights-reserved (prevents direct fork-and-deploy by competitors).
  • mcp-server-mcpindex (the npm package): MIT.
  • MCP Quality Score methodology: open and PR-friendly.

Affiliation

Unofficial. Not affiliated with Anthropic. The Model Context Protocol is open under MIT and trademarks remain with their owners. Server data comes from the official MCP registry.

Frequently asked questions

What is mcpindex?

The MCP server index that vets servers, not just lists them. Advisory screen before you install.

How do I install mcpindex?

It runs as a remote server. In Claude Code: claude mcp add --transport http mcpindex 'https://mcpindex.ai/api/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does mcpindex need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is mcpindex open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains mcpindex?

It is published by mcpindex-ai. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.