fx_rate
Fiat currency exchange rate (ECB reference rates via Frankfurter, with ExchangeRate-API fallback for 150+ currencies), optional amount conversion and historical date. Read-only. Price: $0.005 USDC per successful call (x402, Solana). Same tool over HTTPS: GET https://scorptech.it.com/api/x402/v1/f...
This record as markdown: /tools/com-it-scorptech-x402/fx-rate.md
What fx_rate does on ScorpTech x402 API
AI agents call fx_rate to retrieve information from ScorpTech x402 API 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 |
|---|---|---|---|
to | string | Yes | ISO-4217 quote currency, e.g. EUR |
date | string | — | Historical date YYYY-MM-DD (ECB currencies only, 1999-01-04 onward) |
from | string | Yes | ISO-4217 base currency, e.g. USD |
amount | number | — | Amount of `from` to convert; default 1 |
Parameters from the server's own tool schema.
Why fx_rate is rated Low
Even though fx_rate 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 fx_rate safely
PolicyLayer is an MCP gateway: it sits between your AI agents and ScorpTech x402 API, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For fx_rate, this is the rule to start with:
fx_rate 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 ScorpTech x402 API, apply this rule, and every fx_rate call is checked against it from then on.
Questions about fx_rate
Fiat currency exchange rate (ECB reference rates via Frankfurter, with ExchangeRate-API fallback for 150+ currencies), optional amount conversion and historical date. Read-only. Price: $0.005 USDC per successful call (x402, Solana). Same tool over HTTPS: GET https://scorptech.it.com/api/x402/v1/fx-rate. It is categorised as a Read tool in the ScorpTech x402 API MCP Server, which means it retrieves data without modifying state.
fx_rate accepts 4 parameters: to, date, from, amount. Required: to, from. The full parameter table on this page comes from the server's own tool schema.
Register the ScorpTech x402 API MCP server in PolicyLayer and add a rule for fx_rate: 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 ScorpTech x402 API. Nothing to install.
fx_rate 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 fx_rate 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 fx_rate. 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.
fx_rate is provided by the ScorpTech x402 API MCP server (https://scorptech.it.com/api/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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