pagarme_create_customer · Payments MCP: Risk & Policy

WHAT IT DOES

What pagarme_create_customer does on Payments MCP

AI agents use pagarme_create_customer to create or update resources in Payments MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Payments MCP environment.

WHY IT NEEDS A POLICY

Why pagarme_create_customer needs a policy

This tool creates a new customer entity in the Pagar.me payment gateway, which is a reversible data modification (Write category). Severity is high because creating customer records in a payment system can establish financial relationships, enable fraudulent transactions if misused, and affect billing/payment processing.

From the tool's definition Tool name 'pagarme_create_customer' and description 'Cria um customer no Pagar.me (Core API v5)' indicate creation of a customer record in a payment gateway system.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

pagarme_create_customer Rate-limited

pagarme_create_customer stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "pagarme_create_customer": {
      "limits": [
        {
          "counter": "pagarme_create_customer_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Payments MCP, so you can run agents against it safely.

FAQ

Questions about pagarme_create_customer

What does the pagarme_create_customer tool do? +

Cria um customer no Pagar.me (Core API v5). It is categorised as a Write tool in the Payments MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on pagarme_create_customer? +

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

What risk level is pagarme_create_customer? +

pagarme_create_customer is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit pagarme_create_customer? +

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

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

pagarme_create_customer is provided by the Payments MCP server (lpillonwp/mcp-payments). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.