Critical-risk tools in Pay Mcp
10 of the 15 tools in Pay Mcp are classified as critical risk. This page profiles those tools specifically, with recommended policy actions and the attack patterns that target them.
Every operation listed below is an action PolicyLayer recommends controlling at the transport layer. Open any tool to see the full profile, risk score, and YAML policy snippet.
Tools at critical risk
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pay_webhook_deleteDestructiveDelete a webhook registration by its ID.
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pay_fundFinancialGenerate a funding link to deposit USDC into your wallet.\n\n
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pay_mintFinancialMint testnet USDC (Base Sepolia only). Free test tokens with no real value.\n\n
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pay_requestFinancialMake an HTTP request to a URL. If it returns 402 (Payment Required),
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pay_sendFinancialSend a one-shot USDC payment to an address. Use this for single transfers,
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pay_tab_chargeFinancialCharge against an open tab. Only the provider can charge.
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pay_tab_closeFinancialClose a tab and settle funds. Either party can close unilaterally.\n\n
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pay_tab_openFinancialOpen a pre-funded metered tab with a provider. Use tabs for repeated API calls
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pay_tab_topupFinancialAdd more USDC to an open tab. Only the agent (tab opener) can top up.\n\n
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pay_withdrawFinancialGenerate a withdrawal link to pull USDC out of your wallet.\n\n
Attacks that target this class
Critical-risk tools in any server share these documented attack patterns. Each links to the full case and the defensive policy.