l402-redeem-cashu

SERVER402 SOURCE402-mcp

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/dev-forgesworn-402-mcp/l402-redeem-cashu.md

WHAT IT DOES

What l402-redeem-cashu does on 402

AI agents use l402-redeem-cashu to commit financial operations through 402, usually the final step of a payment, billing, or trading workflow. A call moves real money.

RISK

Why l402-redeem-cashu is rated Critical

This tool redeems ecash tokens (Cashu) against a toll-booth server, which constitutes a financial transaction — it consumes/transfers digital bearer assets (ecash) in exchange for API access credits. Redeeming ecash tokens is irreversible and directly moves monetary value, placing it firmly in the Financial category. Misuse by an AI agent could result in unauthorized consumption of funds or ecash tokens.

From the tool's definition 'Redeem Cashu ecash tokens', 'avoiding the Lightning round-trip', 'create invoice then redeem token'

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs l402-redeem-cashu safely

PolicyLayer is an MCP gateway: it sits between your AI agents and 402, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For l402-redeem-cashu, this is the rule to start with:

l402-redeem-cashu Approval-gated

Any call to l402-redeem-cashu 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": {
    "l402-redeem-cashu": {
      "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 402, apply this rule, and every l402-redeem-cashu call is checked against it from then on.

FAQ

Questions about l402-redeem-cashu

What does the l402-redeem-cashu tool do? +

Redeem Cashu ecash tokens directly on a toll-booth server, avoiding the Lightning round-trip. Handles the two-step flow automatically (create invoice then redeem token). Only works with toll-booth servers. It is categorised as a Financial tool in the 402 MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on l402-redeem-cashu? +

Register the 402 MCP server in PolicyLayer and add a rule for l402-redeem-cashu: 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 402. Nothing to install.

What risk level is l402-redeem-cashu? +

l402-redeem-cashu 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 l402-redeem-cashu? +

Yes. Add a rate_limit block to the l402-redeem-cashu 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 l402-redeem-cashu completely? +

Set action: deny in the PolicyLayer policy for l402-redeem-cashu. 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 l402-redeem-cashu? +

l402-redeem-cashu is provided by the 402 MCP server (402-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on 402, and thousands of servers like it.

This server

All 10 402 tools → Critical-risk tools on this server →

Across the catalogue

build_redeem_withdraw_tx on Atv → All critical-risk MCP tools → The MCP Attack Database →

Guides

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