q402_escrow_lock

Fund a pending escrow: the BUYER gaslessly locks the amount into the vault via EIP-7702 (Q402 relays + sponsors gas). MOVES REAL FUNDS.

SERVERQ402 Mcp SOURCE@quackai/q402-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/io-github-bitgett-q402-mcp/q402-escrow-lock.md

WHAT IT DOES

What q402_escrow_lock does on Q402 Mcp

AI agents use q402_escrow_lock to commit financial operations through Q402 Mcp, usually the final step of a payment, billing, or trading workflow. A call moves real money.

RISK

Why q402_escrow_lock is rated Critical

This tool explicitly moves real funds by locking a buyer's assets into an escrow vault on-chain. It commits a financial obligation and transfers tokens, placing it firmly in the Financial category. The blast radius is critical because misuse could lock real user funds irreversibly in a smart contract vault.

From the tool's definition "Fund a pending escrow: the BUYER gaslessly locks the amount into the vault" and "MOVES REAL FUNDS"

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs q402_escrow_lock safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Q402 Mcp, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For q402_escrow_lock, this is the rule to start with:

q402_escrow_lock Approval-gated

Any call to q402_escrow_lock 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": {
    "q402_escrow_lock": {
      "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 Q402 Mcp, apply this rule, and every q402_escrow_lock call is checked against it from then on.

FAQ

Questions about q402_escrow_lock

What does the q402_escrow_lock tool do? +

Fund a pending escrow: the BUYER gaslessly locks the amount into the vault via EIP-7702 (Q402 relays + sponsors gas). MOVES REAL FUNDS. It is categorised as a Financial tool in the Q402 Mcp MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on q402_escrow_lock? +

Register the Q402 MCP server in PolicyLayer and add a rule for q402_escrow_lock: 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 Q402 Mcp. Nothing to install.

What risk level is q402_escrow_lock? +

q402_escrow_lock 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 q402_escrow_lock? +

Yes. Add a rate_limit block to the q402_escrow_lock 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 q402_escrow_lock completely? +

Set action: deny in the PolicyLayer policy for q402_escrow_lock. 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 q402_escrow_lock? +

q402_escrow_lock is provided by the Q402 MCP server (@quackai/q402-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Q402, and thousands of servers like it.

This server

All 41 Q402 tools → Critical-risk tools on this server →

Across the catalogue

All critical-risk MCP tools → The MCP Attack Database →

Guides

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