submit_marketplace_balance

THE RISK

Critical Risk

The tool explicitly deals with prepayment balances in a marketplace context. Submitting prepayments constitutes a financial commitment or transaction. Misuse by an AI agent could result in unauthorized financial charges or commitments, warranting a critical severity rating under the Financial category.

From the tool's definition 'Submit prepayment balances' — submitting marketplace balance/prepayment directly involves financial transactions and committing monetary obligations

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

HOW TO CONTROL SUBMIT_MARKETPLACE_BALANCE

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 submit_marketplace_balance:

policy.json

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

Any call to submit_marketplace_balance 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 marketplace_invoice_action Perform invoice actions like refund Financial domain_register Register or transfer-in a domain 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 submit_marketplace_balance tool do? +

Submit prepayment balances. 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 submit_marketplace_balance? +

Register the Vercel MCP Server MCP server in PolicyLayer and add a rule for submit_marketplace_balance: 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 submit_marketplace_balance? +

submit_marketplace_balance 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 submit_marketplace_balance? +

Yes. Add a rate_limit block to the submit_marketplace_balance 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 submit_marketplace_balance completely? +

Set action: deny in the PolicyLayer policy for submit_marketplace_balance. 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 submit_marketplace_balance? +

submit_marketplace_balance 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.

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// WHAT SUBMIT_MARKETPLACE_BALANCE ON VERCEL MCP SERVER DOES

// THE RISK

// HOW TO CONTROL SUBMIT_MARKETPLACE_BALANCE

// EXPLORE