// MCP TOOL REFERENCE

create_pix_sale

ServerMcp Afip
CategoryFinancial

WHAT IT DOES

What create_pix_sale does on Mcp Afip

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

THE RISK

Critical Risk

Why create_pix_sale needs a policy

This tool initiates a financial transaction — specifically a Pix payment sale — which creates a real monetary obligation/payment request. Misuse by an AI agent could result in unauthorized financial transactions being generated, making this a critical Financial category risk.

From the tool's definition create a Pix sale (POST /sales with Payment.Type=Pix)... QrCodeBase64Image and QrCodeString... Braspag confirms payment asynchronously via webhook

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

POLICY

How to control create_pix_sale

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

policy.json

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

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

Create a free account and register Mcp Afip — 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

Related tools and policies

More Mcp Afip tools

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Go deeper

Critical-risk tools in Mcp Afip → 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.
Human-in-the-loop → When a tool call should wait for a person — and when policy can decide alone.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
How to Add Spending Controls to Any MCP Agent →
Rate Limiting MCP Tool Calls: A Practical Guide →

FAQ

Questions about create_pix_sale

What does the create_pix_sale tool do? +

Convenience wrapper to create a Pix sale (POST /sales with Payment.Type=Pix). Returns a QrCodeBase64Image and QrCodeString (Pix copia e cola) that the merchant can display. Braspag confirms payment asynchronously via webhook (Notification URL must be configured at merchant level). It is categorised as a Financial tool in the Mcp Afip MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on create_pix_sale? +

Register the Mcp Afip MCP server in PolicyLayer and add a rule for create_pix_sale: 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 Mcp Afip. Nothing to install.

What risk level is create_pix_sale? +

create_pix_sale 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 create_pix_sale? +

Yes. Add a rate_limit block to the create_pix_sale 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_pix_sale completely? +

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

create_pix_sale is provided by the Mcp Afip MCP server (codespar/mcp-dev-latam). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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