One-call pre-trade sanity check:
AI agents call pre_trade_check 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.
While the tool operates in a financial domain (crypto trading), it is purely informational: it reads and analyzes data to inform decision-making rather than executing or committing financial obligations. The actual trade execution would be a separate action.
From the tool's definition Tool name 'pre_trade_check' and description 'One-call pre-trade sanity check' indicate a lookup/validation operation that retrieves or queries data (market conditions, security status, risk metrics) prior to a trade.
Attacks that exploit this kind of access
One-call pre-trade sanity check:. 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 pre_trade_check: 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.
pre_trade_check 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 pre_trade_check 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 pre_trade_check. 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.
pre_trade_check 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.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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