Create a Webpay Mall transaction — one parent buy_order split across several seller commerce codes. Returns { token, url } exactly like Webpay Plus. Each details entry is a child charge with its own commerce_code, buy_order, and amount.
AI agents use webpay_mall_create_transaction to commit financial operations through Mcp Ap2 — usually the final step of a payment, billing, or trading workflow. A call moves real money.
This tool initiates financial transactions by creating payment charges split across multiple sellers. It directly commits financial obligations by creating purchase orders with associated amounts, making it a Financial category tool with critical severity due to potential for unauthorized multi-seller charges.
From the tool's definition Create a Webpay Mall transaction — one parent buy_order split across several seller commerce codes... Each details entry is a child charge with its own commerce_code, buy_order, and amount.
Documented attack patterns abuse exactly the kind of access webpay_mall_create_transaction gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Ap2, and nothing reaches the server without passing your rules. This is the rule we recommend for webpay_mall_create_transaction:
{
"version": "1",
"default": "deny",
"tools": {
"webpay_mall_create_transaction": {
"deny_if": [
{
"conditions": [],
"on_deny": "Requires human approval."
}
]
}
}
}Any call to webpay_mall_create_transaction is blocked until a human approves it. The rest of the server keeps working.
Free to start. No card required.
Create a Webpay Mall transaction — one parent buy_order split across several seller commerce codes. Returns { token, url } exactly like Webpay Plus. Each details entry is a child charge with its own commerce_code, buy_order, and amount. It is categorised as a Financial tool in the Mcp Ap2 MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Mcp Ap2 MCP server in PolicyLayer and add a rule for webpay_mall_create_transaction: 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 Ap2. Nothing to install.
webpay_mall_create_transaction is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the webpay_mall_create_transaction 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.
Set action: deny in the PolicyLayer policy for webpay_mall_create_transaction. 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.
webpay_mall_create_transaction is provided by the Mcp Ap2 MCP server (@codespar/mcp-ap2). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Mcp Ap2, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
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