Find best DeFi yield opportunities across protocols for a given token
AI agents call yield_scanner to retrieve information from AgentPay x402 — Economic-intelligence layer for AI Agents without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and aggregates DeFi yield data across protocols—a read-only intelligence operation. While the broader server context involves financial transactions (agents pay USDC), this specific tool does not move money, execute trades, or commit financial obligations; it only retrieves and analyzes yield information.
From the tool's definition Tool name 'yield_scanner' and description 'Find best DeFi yield opportunities across protocols for a given token' indicate data retrieval and analysis only. No modification, deletion, or execution of transactions.
Attacks that exploit this kind of access
Find best DeFi yield opportunities across protocols for a given token. It is categorised as a Read tool in the AgentPay x402 — Economic-intelligence layer for AI Agents MCP Server, which means it retrieves data without modifying state.
Register the AgentPay x402 — Economic-intelligence layer for AI Agents MCP server in PolicyLayer and add a rule for yield_scanner: 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 AgentPay x402 — Economic-intelligence layer for AI Agents. Nothing to install.
yield_scanner is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the yield_scanner 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.
Set action: deny in the PolicyLayer policy for yield_scanner. 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.
yield_scanner is provided by the AgentPay x402 — Economic-intelligence layer for AI Agents MCP server (romudille-bit/agentpay). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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