Arzbin MCP Server

com.arzbin/market-dataarzbin.comstreamable-httpv1.0.1Scanned 23 hours ago

Live Iran exchange rates, gold, crypto, and Toman market data for AI agents.

6 tools: 3 change things and 3 only read.

Reads private data · 0
Reads text others write · 6
Can send data out · 0
3 findings

Tools listed without sign-in. Remote posture

Anlyon alternative

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.

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.

6 tools

Changes things 3Creates or changes something that can be changed back.Claude Code: ask

convert_to_tomanConverts a fiat, crypto, or gold amount to an estimated Toman value using latest Arzbin indicative market data.Reads text others write1 finding
Why it is in this group
- The name "convert_to_toman" says "convert": a word for a change.
- 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
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Findings
- Warn
  The server marks "convert_to_toman" 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":true}; The name "convert_to_toman" says "convert": a word for a change.
  What this check looks for
Description, as the server wrote it
Converts a fiat, crypto, or gold amount to an estimated Toman value using latest Arzbin indicative market data. Not financial advice.
Annotations the server declares
- title: Convert to Toman
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
- readOnlyHint: true
get_fiat_rate_sourcesReturns Arzbin source comparison data for a fiat currency code where available.Reads text others write1 finding
Why it is in this group
- The name "get_fiat_rate_sources" 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
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Findings
- Warn
  The server marks "get_fiat_rate_sources" 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":true}; The name "get_fiat_rate_sources" says "get": a word for reading.
  What this check looks for
Description, as the server wrote it
Returns Arzbin source comparison data for a fiat currency code where available.
Annotations the server declares
- title: Get fiat rate sources
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
- readOnlyHint: true
get_market_historyReturns OHLC history for a fiat, gold, or crypto market.Reads text others write1 finding
Why it is in this group
- The name "get_market_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
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Findings
- Warn
  The server marks "get_market_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":true}; The name "get_market_history" says "get": a word for reading.
  What this check looks for
Description, as the server wrote it
Returns OHLC history for a fiat, gold, or crypto market. Days are clamped to 1-365.
Annotations the server declares
- title: Get market history
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
- readOnlyHint: true

Only reads 3Looks things up and changes nothing.Show 3 read-only tools

get_latest_crypto_ratesReturns latest curated Arzbin crypto prices in Toman and USD.Reads text others writeNo findings
Why it is in this group
- The name "get_latest_crypto_rates" says "get": 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
Returns latest curated Arzbin crypto prices in Toman and USD. Data is indicative market data, not financial advice.
Annotations the server declares
- title: Get latest crypto rates
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
- readOnlyHint: true
get_latest_fiat_ratesReturns latest Arzbin fiat currency rates in Toman.Reads text others writeNo findings
Why it is in this group
- The name "get_latest_fiat_rates" says "get": 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
Returns latest Arzbin fiat currency rates in Toman. Data is indicative market data, not financial advice.
Annotations the server declares
- title: Get latest fiat rates
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
- readOnlyHint: true
get_latest_gold_ratesReturns latest Arzbin gold and coin rates in Toman.Reads text others writeNo findings
Why it is in this group
- The name "get_latest_gold_rates" says "get": 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
Returns latest Arzbin gold and coin rates in Toman. Data is indicative market data, not financial advice.
Annotations the server declares
- title: Get latest gold rates
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
- readOnlyHint: 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 or outbound.

Reads private data0: Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write6: Brings in text someone else can write: web pages, inbound email, messages, issues and comments.; convert_to_toman
get_fiat_rate_sources
get_latest_crypto_rates
get_latest_fiat_rates
get_latest_gold_rates
get_market_history
Can send data out0: 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.

Remote posture

What anyone on the internet sees at the remote endpoint: an anonymous initialize and tools/list, and the public OAuth metadata.

Tools listed without sign-in

Looked at Oct 22, 2026, 14:27 UTC, unchanged since Oct 22, 2026. No credentials were sent and no tool was called. What is looked at.

Reachable: yes
HTTP status of an anonymous initialize: 200
tools/list served without credentials: yes
Tools that change things, listed without credentials: 3
Protocol version: 2025-06-18
WWW-Authenticate on 401: not observed
resource_metadata in WWW-Authenticate: not observed
RFC 9728 protected resource metadata: not observed
Authorization servers: not observed
Legacy HTTP+SSE transport: no
Dynamic client registration: not observed
Client ID metadata documents: not observed

WarnThe whole server
The endpoint served tools/list without credentials, and the list has 3 tools that change things (3 write). Whether a call also works without credentials was not tested: tools are never called.
Matched text
https://hub.arzbin.com/mcp: tools/list returned 6 tools to an anonymous client, including convert_to_toman (write), get_market_history (write), get_fiat_rate_sources (write)
What this check looks for

Findings

Matches of fixed checks, with the text they matched.

3 warn

Warnconvert_to_toman
The server marks "convert_to_toman" 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":true}; The name "convert_to_toman" says "convert": a word for a change.
What this check looks for
Warnget_market_history
The server marks "get_market_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":true}; The name "get_market_history" says "get": a word for reading.
What this check looks for
Warnget_fiat_rate_sources
The server marks "get_fiat_rate_sources" 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":true}; The name "get_fiat_rate_sources" 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 1.0.1. Values in angle brackets are yours to fill in.

claude mcp add --transport http market-data https://hub.arzbin.com/mcp

claude mcp add --transport http market-data https://hub.arzbin.com/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__market-data__get_latest_gold_rates",
      "mcp__market-data__get_latest_crypto_rates",
      "mcp__market-data__get_latest_fiat_rates"
    ],
    "ask": [
      "mcp__market-data__convert_to_toman",
      "mcp__market-data__get_market_history",
      "mcp__market-data__get_fiat_rate_sources"
    ],
    "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 market-data. Review it before you use it.

Capability tags behind 6 rules

mcp__market-data__convert_to_toman untrusted-input
mcp__market-data__get_latest_gold_rates untrusted-input
mcp__market-data__get_market_history untrusted-input
mcp__market-data__get_latest_crypto_rates untrusted-input
mcp__market-data__get_latest_fiat_rates untrusted-input
mcp__market-data__get_fiat_rate_sources 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.arzbin/market-data/verify?hash=5535621b263bef96194cfd9973615521833ecc85dd3d606fafb03f5cc406ed78" | jq -e '.changed == false'

Pinned hash 5535621b263b, from Oct 21, 2026, 18:33 UTC.

Watch

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

https://anlyon.dev/servers/com.arzbin/market-data/changes.xml

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

Badge

[![anlyon.dev](https://anlyon.dev/badge/com.arzbin/market-data.svg)](https://anlyon.dev/servers/com.arzbin/market-data)

Source: MCP Registry · repository. Synced Oct 21, 2026, 17:51 UTC.