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Dolar MCP

by dan1d

Access Argentine dollar and currency rates, conversions, and spread calculations through MCP.

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Install Dolar MCP

Pick your client, then add it in one click or paste the config.

STDIONode.js
~/Library/Application Support/Claude/claude_desktop_config.json
claude_desktop_config.json
{
  "mcpServers": {
    "dan1d-dolar-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@dan1d/dolar-mcp"
      ]
    }
  }
}

Settings → Developer → Edit Config, merge this into mcpServers, then fully quit and reopen Claude Desktop.

Install not yet sandbox-tested— the server itself is confirmed live (we called its tools/list endpoint). The stdio install command is a separate, ongoing check.

Overview

dan1d/dolar-mcp MCP server gives AI agents access to Argentine exchange rates through DolarAPI. It exposes MCP tools for dollar and foreign-currency lookups, ARS conversions, and comparisons between dollar types. Supported dollar markets include blue, oficial, MEP, CCL, crypto, mayorista, and tarjeta, with buy and sell prices where applicable. Reach for it when an agent needs current Argentine rate data without an API key.

Use cases

  • Check current Argentine dollar quotations
  • Convert USD blue amounts to ARS
  • Look up foreign-currency rates against ARS
  • Compare the spread between two dollar types

Key features

  • Argentine dollar rate lookups
  • Foreign-currency rates versus ARS
  • ARS conversion with buy-rate selection
  • Absolute and percentage spread calculations
  • DolarAPI access without authentication

Tools6

What Dolar MCP lets your agent do. Expand a tool for its parameters.

Verified live~514 tokens of context

Security & health

What it can reach and how reliably it runs — from our own checks, not the maintainer’s claims.

ActiveLast checked Today

Recent health check succeeded.

7/7 checks healthy over the last 79d

Supply-chain signal

No high-severity advisories surfaced by our automated scan.

Critical 0High 0Medium 0Low 0

Scanned 10d ago via OSV.dev · @dan1d/dolar-mcp (npm)

Adoption & maintenance

Factual signals from GitHub, npm, and our automated checks — not a rating.

GitHub stars5Stargazers on the source repository.
npm downloads1.1kPackage downloads in the last 30 days.
Last commit7mo agoMost recent push to the default branch.
Tools exposed6Callable tools this server registers over MCP.
Directory activity1 viewsConfig copies, upvotes, and views on AllMCPs.

How Dolar MCP works

What dan1d/dolar-mcp MCP server does

dan1d/dolar-mcp MCP server connects MCP-compatible AI clients to DolarAPI, a public service for Argentine exchange rates. It provides rates for several Argentine dollar markets, including blue, oficial, bolsa (MEP), contado con liqui (CCL), cripto, mayorista, and tarjeta. Dollar results include buy and sell prices.

The server also covers foreign currencies quoted against the Argentine peso. Examples include EUR, BRL, UYU, and CLP. In addition to retrieving rates, agents can convert amounts and calculate the difference between two dollar types.

How it works

The package runs as an MCP server over a local command launched with npx. After an MCP client starts it, the client can call the available tools and present their results to an AI agent.

Conversions must involve ARS on at least one side. The convert tool can use a selected dollar type or foreign currency, and supports a use_buy option for choosing the buy rate. Spread calculations compare two supported dollar types and return both an absolute and percentage difference.

Setup and configuration

Install the package from npm with:

Terminal
npm install @dan1d/dolar-mcp

For a client that launches local stdio MCP servers, the package can be started with npx -y @dan1d/dolar-mcp. The README provides configurations for Claude Desktop, Cursor, and Windsurf, plus a Claude Code command:

Terminal
claude mcp add dolar -- npx -y @dan1d/dolar-mcp

No environment variables or API credentials are documented as required. The package also exports createDolarTools() for programmatic TypeScript use.

Tools and capabilities

  • get_all_dollars returns the supported Argentine dollar rates and their buy/sell values.
  • get_dollar retrieves one dollar type, such as blue, oficial, bolsa, contadoconliqui, cripto, mayorista, or tarjeta.
  • get_all_currencies returns foreign-currency rates against ARS.
  • get_currency retrieves one foreign-currency rate against ARS.
  • convert changes an amount between ARS and a supported currency or dollar type.
  • get_spread compares two dollar types and reports absolute and percentage spreads.

Limitations and notes

The conversion interface requires ARS to be either the source or destination currency; arbitrary non-ARS-to-non-ARS conversions are not described as supported. Rate values come from DolarAPI, so applications should treat the API as the source of current data rather than assuming the server maintains its own rate history. The documented dollar type names must be passed exactly as supported by the tool interface.

The dan1d/dolar-mcp MCP server is suited to assistants that need current Argentine quotations, simple peso conversions, or comparisons such as blue versus oficial. It is not documented as providing historical rates, trading execution, financial advice, or authentication controls.

For direct library integration, the dan1d/dolar-mcp MCP server exposes createDolarTools() and examples show asynchronous calls for retrieving rates, converting amounts, and calculating spreads.

Read the full README View source on GitHub

Reviews

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Frequently Asked Questions about Dolar MCP

dan1d/dolar-mcp is an MCP server that connects AI agents to DolarAPI for Argentine exchange rates. Its main tools retrieve all or specific dollar rates, list or query foreign currencies, convert amounts involving ARS, and calculate spreads between dollar types. No API key is required.

Install it from npm with `npm install @dan1d/dolar-mcp`, or configure an MCP client to launch `npx -y @dan1d/dolar-mcp`.

Yes, dan1d/dolar-mcp works with Cursor through a `.cursor/mcp.json` entry that launches `npx -y @dan1d/dolar-mcp`. After configuration, Cursor can call the server's rate, conversion, and spread tools.

No, dan1d/dolar-mcp does not require an API key. It reads Argentine exchange-rate data from DolarAPI, which the README identifies as a free public API.

Use the `convert` tool with an amount, source, and destination; at least one side must be ARS. The tool supports Argentine dollar types and foreign currencies, and its `use_buy` option selects the buy rate.

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