MCP server

Guardrail MCP

io.github.kadopi/guardrail-mcp

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Deterministic preflight checks for credentials, fund transfers, writes, and prompt overrides.

Working at last checkAbout 158 tokens per request once connected2 tools

https://guardrail-mcp.kadopi.workers.dev/mcp

At a glance

Type: MCP server
Publisher: Not verified
Status: Working at last check
Tools: 2
Token cost: About 158 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 26 Oct 2026, 08:29 UTC

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http guardrail-mcp https://guardrail-mcp.kadopi.workers.dev/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.guardrail-mcp]
url = "https://guardrail-mcp.kadopi.workers.dev/mcp"

Gemini CLI

{"mcpServers":{"guardrail-mcp":{"httpUrl":"https://guardrail-mcp.kadopi.workers.dev/mcp"}}}

Cursor

{"mcpServers":{"guardrail-mcp":{"url":"https://guardrail-mcp.kadopi.workers.dev/mcp"}}}

VS Code

{"servers":{"guardrail-mcp":{"type":"http","url":"https://guardrail-mcp.kadopi.workers.dev/mcp"}}}

Antigravity

agy mcp add guardrail-mcp https://guardrail-mcp.kadopi.workers.dev/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"guardrail-mcp","server_url":"https://guardrail-mcp.kadopi.workers.dev/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"guardrail-mcp","server_url":"https://guardrail-mcp.kadopi.workers.dev/mcp"}

assess_action_risk ~96 tokens
Runs a deterministic, read-only preflight check. It never executes the proposed action.
get_guardrail_capabilities ~62 tokens
Returns the scope and safety boundary of this free, deterministic preflight checker.

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Quay
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