erc8128_sign_request

THE RISK

Critical Risk

Why erc8128_sign_request needs a policy

Given the server context (multi-chain crypto wallet operations, payments, DeFi), signing a request likely authorizes a financial transaction or payment. The empty description lowers confidence, but the combination of the server's financial nature and 'sign_request' (which typically commits an on-chain action or payment) places this in the Financial category with high severity.

From the tool's definition Tool name 'erc8128_sign_request' on a server described as handling 'transfers, token management, DeFi (swap, lend, stake, bridge, perp)' and 'x402 payments'. ERC-8128 relates to payment channel or request signing protocols in crypto contexts.

Documented attack patterns abuse exactly the kind of access erc8128_sign_request gives an agent:

POLICY

How to control erc8128_sign_request

PolicyLayer is an MCP gateway — it sits between your AI agents and Waiaas, and nothing reaches the server without passing your rules. This is the rule we recommend for erc8128_sign_request:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "erc8128_sign_request": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

Any call to erc8128_sign_request is blocked until a human approves it. The rest of the server keeps working.

Create a free account and register Waiaas — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

GATE THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Waiaas tools

Financial dex_swap Execute DEX swap via D Financial execute_action Execute a DeFi action (swap, bridge, stake, unstake, lend_supply, lend_borrow, lend_repay, Financial aave_withdraw Withdraw supplied collateral from Aave V3 lending pool. Use amount= Financial drift_withdraw_margin Withdraw excess collateral from Drift V2 margin account to wallet Financial hl_sub_transfer Transfer USDC between master account and sub-account Financial hl_transfer_usdc Transfer USDC between Spot and Perp accounts on Hyperliquid Financial kamino_withdraw Withdraw supplied collateral from Kamino K-Lend. Use amount= Financial transfer_nft transfer_nft

All 126 Waiaas tools →

Financial tools on other servers

0xarchive web3_subscribe Math MCP Server financial_calculator MCP Kling generate_video MCP Uber Server uber_request_ride

Go deeper

Critical-risk tools in Waiaas → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Human-in-the-loop → When a tool call should wait for a person — and when policy can decide alone.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
How to Add Spending Controls to Any MCP Agent →
Rate Limiting MCP Tool Calls: A Practical Guide →

FAQ

Questions about erc8128_sign_request

What does the erc8128_sign_request tool do? +

erc8128_sign_request. It is categorised as a Financial tool in the Waiaas MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on erc8128_sign_request? +

Register the Waiaas MCP server in PolicyLayer and add a rule for erc8128_sign_request: 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 Waiaas. Nothing to install.

What risk level is erc8128_sign_request? +

erc8128_sign_request 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 erc8128_sign_request? +

Yes. Add a rate_limit block to the erc8128_sign_request 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 erc8128_sign_request completely? +

Set action: deny in the PolicyLayer policy for erc8128_sign_request. 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 erc8128_sign_request? +

erc8128_sign_request is provided by the Waiaas MCP server (minhoyoo-iotrust/waiaas). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Waiaas tool call.

Start from Waiaas, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →