pay_x402

Fetches an HTTP resource; if it replies with the x402 payment-required protocol (protocol v2,

SERVER8004swap SOURCEStakemate369/8004swap

Critical RISK CLASS

Category Financial

Parameters 00 required

Recommended Approval-gatedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/8004swap/pay-x402.md

WHAT IT DOES

What pay_x402 does on 8004swap

AI agents use pay_x402 to commit financial operations through 8004swap, usually the final step of a payment, billing, or trading workflow. A call moves real money.

RISK

Why pay_x402 is rated Critical

pay_x402 moves real money, and an autonomous agent will call it with the same confidence it calls a search tool. A misread instruction or an injected prompt is all it takes to drain an account or blow a budget.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs pay_x402 safely

PolicyLayer is an MCP gateway: it sits between your AI agents and 8004swap, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For pay_x402, this is the rule to start with:

pay_x402 Approval-gated

Any call to pay_x402 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": {
    "pay_x402": {
      "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 8004swap, apply this rule, and every pay_x402 call is checked against it from then on.

FAQ

Questions about pay_x402

What does the pay_x402 tool do? +

Fetches an HTTP resource; if it replies with the x402 payment-required protocol (protocol v2,. It is categorised as a Financial tool in the 8004swap MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on pay_x402? +

Register the 8004swap MCP server in PolicyLayer and add a rule for pay_x402: 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 8004swap. Nothing to install.

What risk level is pay_x402? +

pay_x402 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 pay_x402? +

Yes. Add a rate_limit block to the pay_x402 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 pay_x402 completely? +

Set action: deny in the PolicyLayer policy for pay_x402. 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 pay_x402? +

pay_x402 is provided by the 8004swap MCP server (Stakemate369/8004swap). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on 8004swap, and thousands of servers like it.

This server

All 5 8004swap tools → Critical-risk tools on this server →

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request_x402_payment on Pop Pay →x402_call on X402 Buyer →pay_invoice on Bitcoin MCP Server → All critical-risk MCP tools → The MCP Attack Database →

Guides

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