presign-guard MCP MCP server

An MCP server that provides security verdicts for AI agents before they sign transactions or approve tokens. It checks approvals, raw transactions, and EIP-712 signatures, returning green, orange, or red statuses with reasons. It also offers token verdicts to detect honeypots and fake tokens, and approval audits to identify risky spenders on chains like Base, Solana, and Ethereum.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-05Operated by Fizzl

MCP endpoint (Streamable HTTP)

https://presign-guard.fizzl.eu/mcp

Vendor documentation

What you can do with it

Check transaction signatures before agent execution
Verify token safety to avoid honeypots
Audit wallet approvals for risky spenders
Get graded verdicts for crypto interactions

Tools advertised by the last live check:

presign_quick_check
token_quick_verdict
presign_check
presign_check_explain
token_verdict
wallet_approvals
feedback

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http presign-guard-mcp https://presign-guard.fizzl.eu/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add presign-guard-mcp --url https://presign-guard.fizzl.eu/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable presign-guard-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "presign-guard-mcp": {
      "url": "https://presign-guard.fizzl.eu/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "presign-guard-mcp": {
      "type": "streamableHttp",
      "url": "https://presign-guard.fizzl.eu/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start presign-guard-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "presign-guard-mcp": {
      "type": "http",
      "url": "https://presign-guard.fizzl.eu/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http presign-guard-mcp https://presign-guard.fizzl.eu/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "presign-guard-mcp": {
      "url": "https://presign-guard.fizzl.eu/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "presign-guard-mcp": {
      "serverUrl": "https://presign-guard.fizzl.eu/mcp"
    }
  }
}

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