// MCP TOOL REFERENCE

create_order_transaction

Create a transaction for an order (e.g. capture, sale, refund). Side effect: creates a Transaction record and may change order financial_status. kind: authorization | capture | sale | void | refund.

ServerSapo
CategoryFinancial

How to control create_order_transaction ↓

WHAT IT DOES

What create_order_transaction does on Sapo

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

THE RISK

Critical Risk

Why create_order_transaction needs a policy

This tool creates financial transaction records and can trigger money movement (capture, sale, refund, void). It directly affects the financial status of orders and involves real monetary operations, making it Financial category with critical severity due to potential for fraudulent refunds, unauthorized captures, or voiding legitimate payments.

From the tool's definition 'Create a transaction for an order (e.g. capture, sale, refund)' and 'kind: authorization | capture | sale | void | refund' — directly creates financial transactions including refunds, captures, and sales

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

POLICY

How to control create_order_transaction

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

policy.json

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

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

Create a free account and register Sapo — 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

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Go deeper

Critical-risk tools in Sapo → 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_order_transaction

What does the create_order_transaction tool do? +

Create a transaction for an order (e.g. capture, sale, refund). Side effect: creates a Transaction record and may change order financial_status. kind: authorization | capture | sale | void | refund. It is categorised as a Financial tool in the Sapo MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on create_order_transaction? +

Register the Sapo MCP server in PolicyLayer and add a rule for create_order_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 Sapo. Nothing to install.

What risk level is create_order_transaction? +

create_order_transaction 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_order_transaction? +

Yes. Add a rate_limit block to the create_order_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.

How do I block create_order_transaction completely? +

Set action: deny in the PolicyLayer policy for create_order_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.

What MCP server provides create_order_transaction? +

create_order_transaction is provided by the Sapo MCP server (nguyennguyenit/sapo-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Sapo tool call.

Start from Sapo, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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