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NetArz FX Rates

ir.netarz/fx-ratesnetarz.irstreamable-httpv1.0.0Scanned

Iranian rial/toman exchange rates (~30 currencies), conversion, history and gold. Free tier, no key.

6 tools: 1 do something that can't be undone, 2 change things and 3 only read.

Tools: 0 delete, 1 irreversible, 2 write, 3 read.
  • Reads private data · 2
  • Reads text others write · 0
  • Can send data out · 2
  • 4 findings, 1 high

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3 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.

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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.

6 tools

Can't be undone 1Claude Code: ask
  • convertConvert an amount between any two currencies, Toman (IRT) or Rial (IRR; 1 Toman = 10 Rial), through the board's dollar rate.Can send data out1 finding

    Why it is in this group

    • The name "convert" says "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

    • outboundThe input takes a destination (input.to): what the tool writes goes there.

    Findings

    • Warn

      The server marks "convert" 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":false}; The name "convert" says "convert": a word for a change.

      What this check looks for
    Description, as the server wrote it
    Convert an amount between any two currencies, Toman (IRT) or Rial (IRR; 1 Toman = 10 Rial), through the board's dollar rate. side=mid (default), buy or sell. تبدیل مبلغ بین دو ارز، تومان یا ریال با نرخ تابلو.

    Annotations the server declares

    • title: Convert an amount (تبدیل ارز)
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
Changes things 2Claude Code: ask
  • get_historyDaily Tehran open-market closing rate of a currency in Toman, with Gregorian and Jalali (Persian calendar) dates.Reads private dataCan send data out1 finding

    Why it is in this group

    • The name "get_history" says "get": a word for reading.
    • The input takes a statement or command to run (input.code), which can change anything it can reach.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    What it can reach

    • private-dataThe description's first sentence says "calendar": it reads calendars.
    • outboundThe input takes a destination (input.to): what the tool writes goes there.

    Findings

    • Warn

      The server marks "get_history" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "get_history" says "get": a word for reading.

      What this check looks for
    Description, as the server wrote it
    Daily Tehran open-market closing rate of a currency in Toman, with Gregorian and Jalali (Persian calendar) dates. Give `days` (back from today) or `from`/`to` (YYYY-MM-DD, Gregorian or Jalali such as 1404-01-01). Without a key: the last 365 days; a Pro FX API key reaches the whole archive (the dollar back to 1360 / 1981). At most 400 points per call; longer windows are sampled. نرخ پایانی روزانهٔ بازار آزاد با تاریخ شمسی و میلادی.

    Annotations the server declares

    • title: Daily rate history (تاریخچهٔ روزانهٔ نرخ)
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • get_rateToday's Tehran free-market rate of one currency in Toman (IRT): buy, sell and mid per quote unit, change against yesterday, and the time of the data.1 finding

    Why it is in this group

    • The name "get_rate" says "get": a word for reading.
    • The input takes a statement or command to run (input.code), which can change anything it can reach.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    Findings

    • Warn

      The server marks "get_rate" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "get_rate" says "get": a word for reading.

      What this check looks for
    Description, as the server wrote it
    Today's Tehran free-market rate of one currency in Toman (IRT): buy, sell and mid per quote unit, change against yesterday, and the time of the data. نرخ امروز یک ارز در بازار آزاد تهران به تومان: خرید، فروش، میانگین و تغییر نسبت به دیروز.

    Annotations the server declares

    • title: Rate of one currency (نرخ یک ارز)
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
Only reads 3Show 3 read-only tools
  • get_gold_pricesGlobal gold and silver ounce in USD, and Toman values of 18k gold per gram, mesghal and coins as NetArz publishes them.1 finding

    Why it is in this group

    • The name "get_gold_prices" says "get": a word for reading.

    Findings

    • High

      The description contains 1 hidden character: zero-width (U+200C).

      Matched text

      description: "...quote them. انس طلا و نقره و ارزش محاسبه<U+200C>ای طلا به تومان (قیمت بازار تهران نیست)."

      What this check looks for
    Description, as the server wrote itContains invisible characters, shown as [U+…]
    Global gold and silver ounce in USD, and Toman values of 18k gold per gram, mesghal and coins as NetArz publishes them. The Toman gold figures are COMPUTED from the ounce and the dollar — not the Tehran market price (no premium or making charge); say so when you quote them. انس طلا و نقره و ارزش محاسبه[U+200C]ای طلا به تومان (قیمت بازار تهران نیست).

    Annotations the server declares

    • title: Gold and silver (طلا و نقره)
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • get_rates_tableThe whole board, or the codes you list, as structured rows plus a ready-to-show markdown table (buy / sell / mid in Toman, change vs yesterday).Reads private dataNo findings

    Why it is in this group

    • The name "get_rates_table" says "get": a word for reading.

    What it can reach

    • private-dataThe name "get_rates_table" says "get" and "table": it reads databases.
    • private-dataThe description's first sentence says "table": it reads databases.
    Description, as the server wrote it
    The whole board, or the codes you list, as structured rows plus a ready-to-show markdown table (buy / sell / mid in Toman, change vs yesterday). جدول نرخ همهٔ ارزها یا ارزهای انتخابی، با جدول markdown آماده.

    Annotations the server declares

    • title: Rates table (جدول نرخ ارزها)
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • list_currenciesEvery currency on the NetArz Tehran free-market board: ISO code, Persian and English name, quote unit (some are quoted per 10 or 100 units) and its netarz.ir page.No findings

    Why it is in this group

    • The name "list_currencies" says "list": a word for reading.
    Description, as the server wrote it
    Every currency on the NetArz Tehran free-market board: ISO code, Persian and English name, quote unit (some are quoted per 10 or 100 units) and its netarz.ir page. Pro-only currencies are listed with pro_only=true. فهرست ارزهای تابلوی نرخ نِت اَرز با واحد مظنه و نشانی صفحهٔ هر ارز.

    Annotations the server declares

    • title: List currencies (فهرست ارزها)
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false

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 untrusted-input.

Reads private data2
Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write0
Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
Can send data out2
Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.

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 high3 warn
  • Highget_gold_prices

    The description contains 1 hidden character: zero-width (U+200C).

    Matched text

    description: "...quote them. انس طلا و نقره و ارزش محاسبه<U+200C>ای طلا به تومان (قیمت بازار تهران نیست)."

    What this check looks for
  • Warnget_rate

    The server marks "get_rate" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "get_rate" says "get": a word for reading.

    What this check looks for
  • Warnconvert

    The server marks "convert" 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":false}; The name "convert" says "convert": a word for a change.

    What this check looks for
  • Warnget_history

    The server marks "get_history" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "get_history" says "get": a word for reading.

    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 fx-rates https://netarz.ir/api/fx/mcp
claude mcp add --transport http fx-rates https://netarz.ir/api/fx/mcp

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__fx-rates__list_currencies",
      "mcp__fx-rates__get_rates_table",
      "mcp__fx-rates__get_gold_prices"
    ],
    "ask": [
      "mcp__fx-rates__get_rate",
      "mcp__fx-rates__convert",
      "mcp__fx-rates__get_history"
    ],
    "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 fx-rates. Review it before you use it.

Capability tags behind 3 rules
  • mcp__fx-rates__get_rates_table private-data
  • mcp__fx-rates__convert outbound
  • mcp__fx-rates__get_history private-data, outbound

Pin

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/ir.netarz/fx-rates/verify?hash=39957aa9f31fcae0773c0af2e34dd3a3f1ac9ddb5c2aef8066a860a7349d4af5" | jq -e '.changed == false'

Pinned hash 39957aa9f31f, from Oct 25, 2026, 15:18 UTC.

Watch

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

https://anlyon.dev/servers/ir.netarz/fx-rates/changes.xml

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Source: MCP Registry. Synced Oct 25, 2026, 15:17 UTC.