create_customer_payment_method · Rebillia MCP Server MCP

WHAT IT DOES

What create_customer_payment_method does on Rebillia MCP Server

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

WHY IT NEEDS A POLICY

Why create_customer_payment_method needs a policy

This tool creates and stores a payment method (card or ACH) for a customer, which is a reversible write operation that modifies customer billing data. While it handles sensitive payment information, it does not directly move money or charge accounts (those are separate tools like 'charge_invoice').

From the tool's definition Tool description states 'Create a payment method for a customer' with required parameters including companyGatewayId, type, paymentMethodNonce, and billingAddress. The verb 'Create' and the action of storing payment method information indicates data creation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_customer_payment_method Rate-limited

create_customer_payment_method 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": {
    "create_customer_payment_method": {
      "limits": [
        {
          "counter": "create_customer_payment_method_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

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

FAQ

Questions about create_customer_payment_method

What does the create_customer_payment_method tool do? +

Create a payment method for a customer. Gateway-agnostic: required companyGatewayId, type (card or ach), paymentMethodNonce, billingAddress (countryCode, street1, city, state, zip). Obtain gateway client credential via get_client_token; use your payment integration to produce paymentMethodNonce, then call this tool. No raw card data or gateway-specific fields in MCP. It is categorised as a Write tool in the Rebillia MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_customer_payment_method? +

Register the Rebillia MCP Server MCP server in PolicyLayer and add a rule for create_customer_payment_method: 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 Rebillia MCP Server. Nothing to install.

What risk level is create_customer_payment_method? +

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

Can I rate-limit create_customer_payment_method? +

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

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

create_customer_payment_method is provided by the Rebillia MCP Server MCP server (rhinosaas/rebillia-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.