bitrefill_create_invoice

THE RISK

Critical Risk

Creating an invoice initiates a financial transaction flow — it commits to purchasing a product and generates a payment address intended to be paid with cryptocurrency. This directly leads to financial obligation and is part of a payment pipeline on a server explicitly designed to 'spend, earn, and receive cryptocurrency'.

From the tool's definition 'Create a Bitrefill invoice for a product. Returns a crypto payment address (USDC by default) that can be passed to the pay tool.'

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

HOW TO CONTROL BITREFILL_CREATE_INVOICE

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

policy.json

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

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

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Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

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Go deeper

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All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
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FAQ

What does the bitrefill_create_invoice tool do? +

Create a Bitrefill invoice for a product. Returns a crypto payment address (USDC by default) that can be passed to the pay tool. It is categorised as a Financial tool in the Agenti MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on bitrefill_create_invoice? +

Register the Agenti MCP server in PolicyLayer and add a rule for bitrefill_create_invoice: 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 Agenti. Nothing to install.

What risk level is bitrefill_create_invoice? +

bitrefill_create_invoice 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 bitrefill_create_invoice? +

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

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

bitrefill_create_invoice is provided by the Agenti MCP server (nirholas/agenti). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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// WHAT BITREFILL_CREATE_INVOICE ON AGENTI DOES

// THE RISK

// HOW TO CONTROL BITREFILL_CREATE_INVOICE

// EXPLORE