AI agents call finance_market_overview to retrieve information from Data Apis without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries public financial market indices and commodity prices—standard reference data. It has no capability to execute trades, modify accounts, delete data, or trigger external operations. The $0.05 USDC cost is a micropayment for API access, not a financial transaction that moves user funds.
From the tool's definition Tool description states it retrieves global market overview data (S&P 500, Dow Jones, NASDAQ, FTSE 100, Nikkei 225, DAX, Gold, Silver, Oil, Treasury yields).
Attacks that exploit this kind of access
Get global market overview: S&P 500, Dow Jones, NASDAQ, FTSE 100, Nikkei 225, DAX, plus Gold, Silver, Oil, and Treasury yields. Costs $0.05 USDC per request via x402 on Base. It is categorised as a Read tool in the Data Apis MCP Server, which means it retrieves data without modifying state.
Register the Data Apis MCP server in PolicyLayer and add a rule for finance_market_overview: 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 Data Apis. Nothing to install.
finance_market_overview 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 finance_market_overview 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 finance_market_overview. 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.
finance_market_overview is provided by the Data Apis MCP server (yantrix-ai/x402-apis-mcp-server). 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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