marketplace_invoice_action

THE RISK

Critical Risk

This tool explicitly performs financial operations including refunds, which directly affect money flows and financial obligations. Refunds are financial transactions that cannot always be reversed, making this a Financial category tool with critical severity due to potential for financial misuse by an AI agent.

From the tool's definition Perform invoice actions like refund

Documented attack patterns abuse exactly the kind of access marketplace_invoice_action gives an agent:

HOW TO CONTROL MARKETPLACE_INVOICE_ACTION

PolicyLayer is an MCP gateway — it sits between your AI agents and Vercel MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for marketplace_invoice_action:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "marketplace_invoice_action": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

Any call to marketplace_invoice_action is blocked until a human approves it. The rest of the server keeps working.

Create a free account and register Vercel MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

More Vercel MCP Server tools

Financial domain_buy Purchase a domain Financial domain_register Register or transfer-in a domain Financial submit_marketplace_balance Submit prepayment balances Financial submit_marketplace_billing Submit marketplace billing data Financial submit_marketplace_invoice Submit a marketplace invoice Destructive cancel_deployment Cancel a deployment which is currently building Destructive delete_access_group Delete an access group Destructive delete_access_group_project Delete an access group project

All 154 Vercel MCP Server tools →

Financial tools on other servers

Atv build_deposit_tx Bitcoin MCP Server pay_invoice AbraFlexi bank_transaction_create Hilanet MCP decrease_coworker_salary

Go deeper

Critical-risk tools in Vercel MCP Server → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
How to Add Spending Controls to Any MCP Agent →
Rate Limiting MCP Tool Calls: A Practical Guide →

FAQ

What does the marketplace_invoice_action tool do? +

Perform invoice actions like refund. It is categorised as a Financial tool in the Vercel MCP Server MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on marketplace_invoice_action? +

Register the Vercel MCP Server MCP server in PolicyLayer and add a rule for marketplace_invoice_action: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Vercel MCP Server. Nothing to install.

What risk level is marketplace_invoice_action? +

marketplace_invoice_action is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit marketplace_invoice_action? +

Yes. Add a rate_limit block to the marketplace_invoice_action rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block marketplace_invoice_action completely? +

Set action: deny in the PolicyLayer policy for marketplace_invoice_action. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides marketplace_invoice_action? +

marketplace_invoice_action is provided by the Vercel MCP Server MCP server (quegenx/vercel-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Vercel MCP Server tool call.

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// WHAT MARKETPLACE_INVOICE_ACTION ON VERCEL MCP SERVER DOES

// THE RISK

// HOW TO CONTROL MARKETPLACE_INVOICE_ACTION

// EXPLORE