Atlas / MCP servers / wesbos / Currency Conversion

Currency ConversionBLOCK

mcp/wesbos/currency-conversion

A currency conversion MCP server

Verdict
BLOCK
Grade
D
Trust score
69 /100
Exposed tools
4 4r · 0w · 0d
Transport
—
License
—
Stars
36
01

Overview

From the repository's own README, as read at the audited commit. Badges and raw HTML are left out.

An MCP server that provides real-time currency conversion and exchange rate data using the Frankfurter API.

Using

URL base is https://currency-mcp.wesbos.com

There are two endpoints - /mcp for streamable HTTP and /sse for legacy HTTP+SSE.

Right now many clients do not offer support for streamable http, so you can use it with a proxy:

{
"mcpServers": {
"currency-conversion": {
"command": "npx",
"args": ["mcp-remote", "https://currency-mcp.wesbos.com/sse"]
}
},
}

Available Tools

convert_currency

Convert an amount from one currency to another.

Parameters:

  • from (string): Source currency code (3 letters, e.g., "USD", "EUR")
  • to (string): Target currency code (3 letters, e.g., "USD", "EUR")
  • amount (number): Amount to convert (positive number)

Example: Convert 100 USD to EUR

{
"from": "USD",
"to": "EUR",
"amount": 100
}

get_latest_rates

Fetch the latest exchange rates.

Parameters:

  • base (string, optional): Base currency code (defaults to EUR)
  • symbols (string, optional): Comma-separated currency codes to limit results

Example: Get USD rates for specific currencies

{
"base": "USD",
"symbols": "EUR,GBP,JPY"
}

get_currencies

List all available currencies with their full names.

Parameters: None

get_historical_rates

Get historical exchange rates for a specific date.

Parameters:

  • date (string): Date in YYYY-MM-DD format
  • base (string, optional): Base currency code (defaults to EUR)
  • symbols (string, optional): Comma-separated currency codes to limit results

Example: Get historical EUR rates for January 1, 2024

{
"date": "2024-01-01",
"base": "EUR",
"symbols": "USD,GBP"
}

Data Source

Exchange rate data is provided by the [Frankfurter API](https://fran

Read from source at commit c23cf3f01fbcOBSERVED · 2026-10-08
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02

Connect

Built from this server's own package name, version and transport as found in its source — not copied from anyone's documentation, so it cannot drift against a page we do not control.

claude-code
claude mcp add remote-mcp-server-authless -- npx -y [email protected]
claude-desktop
{
  "mcpServers": {
    "remote-mcp-server-authless": {
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ]
    }
  }
}
03

Exposed tools (4)

4 read · 0 write · 0 destructive.

ToolRiskDescription
convert_currencyread
get_currenciesread
get_historical_ratesread
get_latest_ratesread
04

Trust audit

BLOCKgrade D · trust 69/100 Do not install this without reading the findings. The audit found something that could harm you or your machine.

LayerWhat it checksResult
L0Provenance & inventoryPASS
L1Static analysis of the codeFAIL
L2Instruction surface (what it tells the agent)PASS
L3Class-specific surfacePASS
L4Behavioural (sandbox)SKIPPED

What the source does

Filesystem
none-observed
Network
declared (5 observation(s))
Shell
declared (2 observation(s))
Dependencies
not all pinned
Secrets in source
none-found

Findings (6)

HIGHCode injection · code.eval_exec · CWE-78, CWE-94, CWE-95
worker-configuration.d.ts:2221
exec(input?: (string | URLPatternInit), baseURL?: string): URLPatternResult | null;
Why it matters. evaluates text as code
Fix. remove; use a parser or a dispatch table
HIGHCode injection · code.eval_exec · CWE-78, CWE-94, CWE-95
worker-configuration.d.ts:6219
exec(query: string): Promise<D1ExecResult>;
Why it matters. evaluates text as code
Fix. remove; use a parser or a dispatch table
LOWInventory / provenance · inv.no_license · CWE-1104
Why it matters. no LICENSE file and no repo licence
Fix. add a licence
LOWObfuscation / stealth · obf.decode_call · CWE-506, CWE-94
worker-configuration.d.ts:205
atob(data: string): string;
LOWObfuscation / stealth · obf.decode_call · CWE-506, CWE-94
worker-configuration.d.ts:291
declare function atob(data: string): string;
LOWSupply chain · supply.unpinned · CWE-829, CWE-1357
package.json
@modelcontextprotocol/sdk, zod, @biomejs/biome, @cloudflare/workers-types, @types/node, typescript, wrangler
Why it matters. 7 dependency range(s) float
Fix. pin exact versions or ship a lockfile

Gates applied: no_behavioural_pass, no_license.

Audited 2026-10-08 · audit v0.4.1 · source sha c23cf3f01fbcfull audit observations/trust-audit/mcp-server/wesbos__currency-conversion.json · Report an issue / request a re-scan
05

Audit history

Every audit this server has had. A grade with a past is a grade somebody is still checking.

DateSourceVerdictGradeScoreChange
2026-10-08c23cf3f01fbcBLOCKD69first audit
06

Questions

What is the Currency Conversion MCP server?

A currency conversion MCP server

What tools does Currency Conversion expose?

4 in total: 4 read-only, 0 that write, and 0 that can delete or overwrite. Every one is listed on this page with its risk.

Is Currency Conversion safe to connect to an agent?

No — not without reading the findings first. The audit graded it D (69/100) and found 2 critical or high issues in the source. Each one is listed on this page with the file and line it is on.

What credentials does Currency Conversion need?

No credential environment variables were found in its source, so it appears to need none.

How current is this page?

The grade is for one exact copy of the source (c23cf3f01fbc), read on 2026-10-08. The repository is watched and re-audited when it changes.

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