Faceabot Exchange rates

com.faceabot/exchange-ratesfaceabot.comstreamable-httpv1.0.0Scanned 1 hour ago

Exchange rates for about 150 currencies from central banks (ECB and others). Free, no key.

2 tools: 1 do something that can't be undone and 1 only read.

Reads private data · 0
Reads text others write · 2
Can send data out · 1
1 finding

Anlyon alternative

1 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

Import an OpenAPI spec →

Tools

Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.

2 tools

Can't be undone 1Sends, pays, publishes or merges: once done, it cannot be taken back.Claude Code: ask

exchange_rateConverts an amount between currencies with official central-bank rates: European Central Bank, Bank of Russia, National Bank of Ukraine, National Bank of Poland.Reads text others writeCan send data out1 finding
Why it is in this group
- The description's first verb is "convert": a word for a change.
- The input addresses people (input.to): what it sends cannot be taken back.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
- outboundThe input takes a destination (input.to): what the tool writes goes there.
Findings
- Warn
  The server marks "exchange_rate" read-only (readOnlyHint: true), and its own name, description or input give the class "irreversible".
  Matched text
  annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The description's first verb is "convert": a word for a change.
  What this check looks for
Description, as the server wrote it
Converts an amount between currencies with official central-bank rates: European Central Bank, Bank of Russia, National Bank of Ukraine, National Bank of Poland. About 150 currencies: USD, EUR, JPY, GBP, CNY, INR, RUB, UAH, NGN, ARS, EGP, AED, SAR, PKR, VND, KES, TRY, BRL, KZT… Each result names its bank and date. Today or any past date since 2002. Use when: you need an exchange rate or to convert a price ("100 USD in RUB", "euro to yen today", "naira to dollar"). Not for: crypto prices, or the exact rate a bank will charge. Example: {"from":"USD","to":"RUB","amount":100}
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true

Only reads 1Looks things up and changes nothing.Show 1 read-only tool

list_currenciesLists every currency covered, with the central banks that publish it and the date of their latest rates.Reads text others writeNo findings
Why it is in this group
- The name "list_currencies" says "list": a word for reading.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
Lists every currency covered, with the central banks that publish it and the date of their latest rates. Use when: you need to know whether a currency is covered.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data.

Reads private data0: Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write2: Brings in text someone else can write: web pages, inbound email, messages, issues and comments.; exchange_rate
list_currencies
Can send data out1: Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.; exchange_rate

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Findings

Matches of fixed checks, with the text they matched.

1 warn

Warnexchange_rate
The server marks "exchange_rate" read-only (readOnlyHint: true), and its own name, description or input give the class "irreversible".
Matched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The description's first verb is "convert": a word for a change.
What this check looks for

History

Changes to its tool definitions and to its remote endpoint, newest first.

No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.

All changes to this server

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http exchange-rates https://faceabot.com/tools-mcp/exchange-rates

claude mcp add --transport http exchange-rates https://faceabot.com/tools-mcp/exchange-rates

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json

{
  "permissions": {
    "allow": [
      "mcp__exchange-rates__list_currencies"
    ],
    "ask": [
      "mcp__exchange-rates__exchange_rate"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as exchange-rates. Review it before you use it.

Capability tags behind 2 rules

mcp__exchange-rates__exchange_rate untrusted-input, outbound
mcp__exchange-rates__list_currencies untrusted-input

Keep the decision: fail CI when the tools change, follow every change, or show a badge.

Pin in CI

Fail a build when the tools you reviewed are not the tools the server serves today.

curl -s "https://anlyon.dev/api/v1/servers/com.faceabot/exchange-rates/verify?hash=ee2841cc2dc636d01b922a9363cc785d33c10abdc2510fce961719c2d78ec4f6" | jq -e '.changed == false'

Pinned hash ee2841cc2dc6, from Oct 27, 2026, 17:18 UTC.

Watch

Get told when its tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/com.faceabot/exchange-rates/changes.xml

An Atom feed. Works in any feed reader or Slack's RSS app.

Badge

[![anlyon.dev](https://anlyon.dev/badge/com.faceabot/exchange-rates.svg)](https://anlyon.dev/servers/com.faceabot/exchange-rates)

Source: MCP Registry. Synced Oct 27, 2026, 17:17 UTC.