sap_payments_fund_prepaid

SERVERSap SOURCEhttps://mcp.sap.oobeprotocol.ai/mcp

Critical RISK CLASS

Category Financial

Parameters 31 required

Recommended Approval-gatedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/oobe-protocol-labs-sap-mcp-server/sap-payments-fund-prepaid.md

WHAT IT DOES

What sap_payments_fund_prepaid does on Sap

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

Parameter	Type	Required	Description
`ttlHours`	number	—	Session TTL in hours. Defaults to 24.
`amountUsd`	number	Yes	Total USDC to deposit into the prepaid session. This amount is charged via x402 when calling this tool.
`perCallCostUsd`	number	—	Cost deducted from the prepaid balance per granted call. Defaults to 0.015 USD.

Parameters from the server's own tool schema.

RISK

Why sap_payments_fund_prepaid is rated Critical

Tool directly moves funds by charging and depositing money into a prepaid credit session.

From the tool's definition creates a prepaid session... x402 charge... funding deposit... remainingUsd

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs sap_payments_fund_prepaid safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Sap, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For sap_payments_fund_prepaid, this is the rule to start with:

sap_payments_fund_prepaid Approval-gated

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

View as policy code

policy.json

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

GATE THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Sap, apply this rule, and every sap_payments_fund_prepaid call is checked against it from then on.

FAQ

Questions about sap_payments_fund_prepaid

What does the sap_payments_fund_prepaid tool do? +

Hosted paid tool that creates a prepaid session. The x402 charge for this tool IS the funding deposit. After settlement, creates a prepaid credit session with the specified amount and per-call cost. Returns sessionId, remainingUsd, and expiresAt. Pass the returned sessionId as prepaidSessionId to sap_payments_call_paid_tool for future calls to bypass per-call 402 challenges (x402 Lifecycle Hooks grantAccess pattern). SAP MCP execution guidance: Intent: local non-custodial payment/signing bridge. Pricing: paid value-action; preview cost and transaction effects before user confirmation. Routing: local sap_payments bridge. It may sign x402 payment payloads or user-approved transactions locally, and must never expose keypair bytes. Signer boundary: user-controlled local profile or external signer; OOBE hosted MCP remains non-custodial. It is categorised as a Financial tool in the Sap MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

What parameters does sap_payments_fund_prepaid accept? +

sap_payments_fund_prepaid accepts 3 parameters: ttlHours, amountUsd, perCallCostUsd. Required: amountUsd. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on sap_payments_fund_prepaid? +

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

What risk level is sap_payments_fund_prepaid? +

sap_payments_fund_prepaid 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 sap_payments_fund_prepaid? +

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

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

sap_payments_fund_prepaid is provided by the Sap MCP server (https://mcp.sap.oobeprotocol.ai/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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Guides

Govern MCP payment tools →Human-in-the-loop →Tool call approval →