send_invoice

Send an invoice to recipients

SERVERPayPal SOURCE@modelcontextprotocol/server-paypal

Critical RISK CLASS

Category Financial

Parameters 00 required

Recommended Approval-gatedsee the rule below

Registry record Grade F, identity verified Pull the record →

This record as markdown: /tools/paypal/send-invoice.md

WHAT IT DOES

What send_invoice does on PayPal

AI agents use send_invoice to commit financial operations through PayPal, usually the final step of a payment, billing, or trading workflow. A call moves real money.

RISK

Why send_invoice is rated Critical

This tool sends invoices which are financial documents that create payment obligations and commit monetary transactions. While not directly moving money like a payment would, invoicing is a critical step in financial workflows that can obligate parties to pay. The high severity reflects that a compromised AI agent could send fraudulent invoices to arbitrary recipients, causing financial and reputational harm.

From the tool's definition Tool is part of PayPal server with sibling tools including create_invoice, create_refund, create_subscription, and create_order. The tool name 'send_invoice' combined with PayPal context indicates financial operations.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs send_invoice safely

PolicyLayer is an MCP gateway: it sits between your AI agents and PayPal, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For send_invoice, this is the rule to start with:

send_invoice Approval-gated

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

View as policy code

policy.json

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

GATE THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect PayPal, apply this rule, and every send_invoice call is checked against it from then on.

FAQ

Questions about send_invoice

What does the send_invoice tool do? +

Send an invoice to recipients. It is categorised as a Financial tool in the PayPal MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on send_invoice? +

Register the PayPal MCP server in PolicyLayer and add a rule for send_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 PayPal. Nothing to install.

What risk level is send_invoice? +

send_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 send_invoice? +

Yes. Add a rate_limit block to the send_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 send_invoice completely? +

Set action: deny in the PolicyLayer policy for send_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 send_invoice? +

send_invoice is provided by the PayPal MCP server (@modelcontextprotocol/server-paypal). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on PayPal, and thousands of servers like it.

This server

All 30 PayPal tools → Critical-risk tools on this server →

Across the catalogue

pay_invoice on Bitcoin MCP Server →menese_send on Mcp Menesesdk →approve_supplier_invoice on Tripletex MCP Server → All critical-risk MCP tools → The MCP Attack Database →

Guides

Govern MCP payment tools →Human-in-the-loop →Tool call approval →