Every MCP tool call runs unchecked. Until now.

$ gemini mcp add --transport http -s user \
    --header "Authorization: Bearer <your-api-key>" \
    sentinelgate http://localhost:8080/mcp

# Add SentinelGate as MCP server
$ export SG_KEY="<your-api-key>"
$ codex mcp add sentinelgate \
    --url http://localhost:8080/mcp \
    --bearer-token-env-var SG_KEY

# NOTE: Codex does NOT persist the API key.
# The env var must be set each session.
# To make permanent: echo 'export SG_KEY="..."' >> ~/.zshrc

{
  "mcpServers": {
    "sentinelgate": {
      "type": "http",
      "url": "http://localhost:8080/mcp",
      "headers": {
        "Authorization": "Bearer <your-api-key>"
      }
    }
  }
}

import httpx
from mcp import ClientSession
from mcp.client.streamable_http import streamable_http_client

http_client = httpx.AsyncClient(
    headers={"Authorization": "Bearer <your-api-key>"}
)
async with streamable_http_client(
    "http://localhost:8080/mcp", http_client=http_client
) as (read, write, _):
    async with ClientSession(read, write) as session:
        await session.initialize()
        tools = await session.list_tools()
        result = await session.call_tool("read_file", {"path": "/tmp/test.txt"})

import { Client } from "@modelcontextprotocol/sdk/client/index.js";
import { StreamableHTTPClientTransport } from "@modelcontextprotocol/sdk/client/streamableHttp.js";

const transport = new StreamableHTTPClientTransport(
  new URL("http://localhost:8080/mcp"),
  { requestInit: { headers: { "Authorization": "Bearer <your-api-key>" } } }
);
const client = new Client({ name: "my-client", version: "1.0.0" });
await client.connect(transport);

const { tools } = await client.listTools();
const result = await client.callTool({ name: "read_file", arguments: { path: "/tmp/test.txt" } });

# List available tools
$ curl -X POST http://localhost:8080/mcp \
  -H "Authorization: Bearer <your-api-key>" \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc": "2.0", "id": 1, "method": "tools/list"}'

# Call a tool
$ curl -X POST http://localhost:8080/mcp \
  -H "Authorization: Bearer <your-api-key>" \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc": "2.0", "id": 2, "method": "tools/call",
    "params": {"name": "read_file", "arguments": {"path": "/tmp/test.txt"}}}'