Real-time USD exchange rates to 160+ currencies (EUR, GBP, JPY, CNY, and more), updated daily. Useful for AI agents that pay in USDC and need to convert or display prices in other currencies. Returns the rate of 1 USD against every supported currency plus the last-update timestamp. No API key req...
AI agents call navi_usd_fx_rates to retrieve information from Navi X402 without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves read-only exchange rate data with no side effects. Although it involves a micro-payment per call ($0.002 USDC), the tool itself does not move money or commit financial obligations beyond a negligible automated fee inherent to the platform's payment model; its core function is fetching currency conversion rates.
From the tool's definition Real-time USD exchange rates to 160+ currencies... Returns the rate of 1 USD against every supported currency plus the last-update timestamp.
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
Real-time USD exchange rates to 160+ currencies (EUR, GBP, JPY, CNY, and more), updated daily. Useful for AI agents that pay in USDC and need to convert or display prices in other currencies. Returns the rate of 1 USD against every supported currency plus the last-update timestamp. No API key required. (Paid via x402: $0.002 USDC per call on Base, settled automatically.). It is categorised as a Read tool in the Navi X402 MCP Server, which means it retrieves data without modifying state.
Register the Navi X402 MCP server in PolicyLayer and add a rule for navi_usd_fx_rates: 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 Navi X402. Nothing to install.
navi_usd_fx_rates 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 navi_usd_fx_rates 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 navi_usd_fx_rates. 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.
navi_usd_fx_rates is provided by the Navi X402 MCP server (navi-x402-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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