All servers · Agent payments (x402) · Security

MCP security checks — WARDEN and HISTOR

dev.modelmarket/mcp-security · v1.0.0

Measured by MCP Station

Description written by the publisher, not verified

Scan MCP tool definitions for poisoning, look up server history, count tool-list tokens. Free.

Connect

claude mcp add --transport http mcp-security https://modelmarket.dev/tools/mcp/security

{
  "mcpServers": {
    "mcp-security": {
      "url": "https://modelmarket.dev/tools/mcp/security"
    }
  }
}

Tools as reported by the server

• warden_scan
  Scan an MCP server's tools/list with WARDEN, the open-source MCP firewall: static rules and a threat list over every name, description, schema and annotation. Returns allow or block and each finding with its rule and severity. Quoted fragments of the scanned text are left out of the answer.
• histor_check
  Look up an MCP server in HISTOR, a public append-only log of MCP tool sets: when its tool set was first pinned, how often it changed, and what the pattern scan found. HISTOR answers from its own observations and never contacts the server.
• tool_list_cost
  How many tokens an MCP server's tool list adds to every model request, what that costs per 1,000 requests, the heaviest tools, and where it sits among 18,204 packages and 16,170 remote servers. Send a tools/list or name a server HISTOR observes.
• x402_check
  Check a signed x402 USDC payment before submitting it: recovers the EIP-712 signer, runs USDC's own checks and the seller's terms, and when the signature fails names the domain it was really made for (e.g. Base Sepolia's 'USDC' used on Base, where USDC is 'USD Coin').

Repository · Website · JSON · Text for agents · Registry updated 2026-10-20