get_fx_rates
utilpeek: foreign-exchange reference rates for a base currency. For live on-chain rates use get_live_fx_rates. Unknown currencies and older dates are a 422 (not charged); an ECB outage is a 5xx (not charged). Typically under 0.1 s (up to 10 s on a refresh). Price: USD 0.001. Free: 10 utilpeek cal...
This record as markdown: /tools/dev-tanod-tanod/get-fx-rates.md
What get_fx_rates does on Tanod
AI agents call get_fx_rates to retrieve information from Tanod without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
base | string | Yes | Base currency (ISO 4217, e.g. USD), or EUR. |
date | object | — | Optional YYYY-MM-DD within the last 90 days (default: latest). |
symbols | object | — | Optional: 1-40 ISO 4217 codes to return (default: all ECB currencies). |
Parameters from the server's own tool schema.
Why get_fx_rates is rated Low
Even though get_fx_rates only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.
Attacks that exploit this kind of access
The rule that runs get_fx_rates safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Tanod, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For get_fx_rates, this is the rule to start with:
get_fx_rates is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Tanod, apply this rule, and every get_fx_rates call is checked against it from then on.
Questions about get_fx_rates
utilpeek: foreign-exchange reference rates for a base currency. For live on-chain rates use get_live_fx_rates. Unknown currencies and older dates are a 422 (not charged); an ECB outage is a 5xx (not charged). Typically under 0.1 s (up to 10 s on a refresh). Price: USD 0.001. Free: 10 utilpeek calls per IP per UTC day. Rates are the European Central Bank (ECB) euro reference rates, available free of charge at ecb.europa.eu; non-EUR bases are cross rates computed by Tanod. For information purposes only, not for transactions (attribution carries the ECB terms). Docs: https://tanod.dev/learn/exchange-rates-api.html. It is categorised as a Read tool in the Tanod MCP Server, which means it retrieves data without modifying state.
get_fx_rates accepts 3 parameters: base, date, symbols. Required: base. The full parameter table on this page comes from the server's own tool schema.
Register the Tanod MCP server in PolicyLayer and add a rule for get_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 Tanod. Nothing to install.
get_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 get_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 get_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.
get_fx_rates is provided by the Tanod MCP server (https://tanod.dev/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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