intent0xSwap

THE RISK

Critical Risk

Why intent0xSwap needs a policy

This tool executes token swaps across multiple blockchain networks, which constitutes a financial transaction moving cryptocurrency assets between parties. It also handles ERC20 approvals automatically, granting spending permissions on-chain. Misuse could result in irreversible financial losses through unauthorized token swaps or malicious approval grants.

From the tool's definition Swap tokens on Ethereum, Optimism, Arbitrum, or Base via the 0x/Matcha aggregator. Automatically handles ERC20 approval if needed.

Documented attack patterns abuse exactly the kind of access intent0xSwap gives an agent:

POLICY

How to control intent0xSwap

PolicyLayer is an MCP gateway — it sits between your AI agents and Agentek Eth, and nothing reaches the server without passing your rules. This is the rule we recommend for intent0xSwap:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "intent0xSwap": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

Any call to intent0xSwap is blocked until a human approves it. The rest of the server keeps working.

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

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EXPLORE

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Go deeper

Critical-risk tools in Agentek Eth → 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 intent0xSwap

What does the intent0xSwap tool do? +

Swap tokens on Ethereum, Optimism, Arbitrum, or Base via the 0x/Matcha aggregator. Automatically handles ERC20 approval if needed. Checks balance before swapping. It is categorised as a Financial tool in the Agentek Eth MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on intent0xSwap? +

Register the Agentek Eth MCP server in PolicyLayer and add a rule for intent0xSwap: 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 Agentek Eth. Nothing to install.

What risk level is intent0xSwap? +

intent0xSwap 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 intent0xSwap? +

Yes. Add a rate_limit block to the intent0xSwap 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 intent0xSwap completely? +

Set action: deny in the PolicyLayer policy for intent0xSwap. 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 intent0xSwap? +

intent0xSwap is provided by the Agentek Eth MCP server (nanidao/agentek). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Agentek Eth tool call.

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

CHECK YOUR STACK →