FlowSentry

Security scanner for n8n workflows + live MCP Trust-Check.

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What it can do

    What data it sees

    Do you need an account

    No: the server works without sign-in

    Security scanner for n8n workflows + live MCP Trust-Check. 18 rules, OWASP mapped. Paid x402 API.

    How to connect

    How to connect FlowSentry to Claude

    The server address to paste into Claude settings:

    https://flowsentry-agentpay2.vercel.app/mcp

    1. Open Claude (claude.ai or the desktop app).
    2. Go to Settings → Connectors.
    3. Click Add custom connector.
    4. Paste the server address copied below into Remote MCP server URL and click Add.
    5. In a chat, click + → Connectors and switch the new connector on.

    Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

    Authorization

    After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

    How to connect FlowSentry to ChatGPT

    The server address to paste into ChatGPT settings:

    https://flowsentry-agentpay2.vercel.app/mcp

    1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
    2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
    3. Open Settings → Connectors and click Create.
    4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
    5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
    6. In a new chat open + → Apps/Connectors and enable the connector.

    OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

    Authorization

    On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

    How to connect FlowSentry to Cursor

    The server address to paste into Cursor settings:

    https://flowsentry-agentpay2.vercel.app/mcp

    Fastest: click Open in Cursor below and confirm the prompt.

    Manually:

    1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
    2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
    3. Save the file. The server appears in the MCP list; authorize it there if asked.

    Authorization

    If the service needs sign-in, an authorize button appears next to the server in the MCP list.

    Server tool list (3)

    Raw names from tools/list. Only developers need these.

    list_rulesList all 18 FlowSentry security rules with severity and OWASP Agentic mapping.
    scan_workflowScan one n8n workflow JSON export (string) and return the findings report. Accepts the raw workflow object ({'nodes': [...], ...}) or the CLI export wrapper ({'name':..., 'workflow': {...}}). Max 512 KB.
    trust_checkLive security Trust-Check of a remote MCP server URL (streamable HTTP). Sends one benign MCP initialize handshake and inspects auth posture, header hygiene, version disclosure and reachability. Returns trust score 0-100, grade A-F, verdict (trusted/acceptable/caution/unsafe/unreachable) and structured findings. Paid unlimited lane: POST /v1/trust-check on the same host ($0.25 USDC per check, x402 on Base).