frankfurter.currency.latest
Get the latest European Central Bank (ECB) reference exchange rates from Frankfurter.dev (api.frankfurter.dev/v1). Returns rates for 33 major currencies relative to a base currency (default EUR). Rates are updated each business day at ~16:00 CET by the ECB. Supports optional base currency overrid...
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What frankfurter.currency.latest does on Apibase
AI agents call frankfurter.currency.latest to retrieve information from Apibase 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 | — | Base currency ISO 4217 code to convert from (default: EUR). Supported: AUD,BRL,CAD,CHF,CNY,CZK,DKK,EUR,GBP,HKD,HUF,IDR,ILS,INR,ISK,JPY,KRW,MXN,MYR,NOK,NZD,PHP,P |
amount | number | — | Amount to convert (default: 1.0). Returns rates scaled to this amount. |
symbols | string | — | Comma-separated target currency codes to return (e.g. USD,GBP,JPY). Omit for all 33 currencies. |
Parameters from the server's own tool schema.
Why frankfurter.currency.latest is rated Low
Tool retrieves current currency exchange rates without modifying data or executing operations.
From the tool's definition Get latest ECB reference exchange rates; read-only retrieval; no side effects.
Attacks that exploit this kind of access
The rule that runs frankfurter.currency.latest safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Apibase, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For frankfurter.currency.latest, this is the rule to start with:
frankfurter.currency.latest 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 Apibase, apply this rule, and every frankfurter.currency.latest call is checked against it from then on.
Questions about frankfurter.currency.latest
Get the latest European Central Bank (ECB) reference exchange rates from Frankfurter.dev (api.frankfurter.dev/v1). Returns rates for 33 major currencies relative to a base currency (default EUR). Rates are updated each business day at ~16:00 CET by the ECB. Supports optional base currency override, target currency filter, and amount scaling for instant conversion. No auth required; public domain ECB data. Ideal for FX dashboards, invoicing, and multi-currency apps. It is categorised as a Read tool in the Apibase MCP Server, which means it retrieves data without modifying state.
frankfurter.currency.latest accepts 3 parameters: base, amount, symbols. The full parameter table on this page comes from the server's own tool schema.
Register the Apibase MCP server in PolicyLayer and add a rule for frankfurter.currency.latest: 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 Apibase. Nothing to install.
frankfurter.currency.latest 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 frankfurter.currency.latest 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 frankfurter.currency.latest. 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.
frankfurter.currency.latest is provided by the Apibase MCP server (apibase-mcp-client). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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