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Currency Converter API

br0ski777/currency-converter-x402

Pulls exchange rates from the European Central Bank for fiat currencies and CoinGecko for crypto, letting you convert between them without hunting down APIs yourself. The x402 suffix indicates it supports micropayments through the HTTP 402 protocol, though the GitHub repo is sparse on implementation details. You'd reach for this when building finance dashboards, expense trackers, or any tool where Claude needs to quote prices across currencies in real time. Runs as a remote server over SSE, so no local setup required. Straightforward currency conversion as a service, assuming the hosted endpoint at klymax402.com stays reliable.

tool
1
transport
SSE
last updated
May 16, 2026
View on GitHub

Tools

1 tools

Public tool metadata for what this MCP can expose to an agent.

finance_convert_currencyUse this when you need to convert between any currencies -- both fiat (USD, EUR, GBP, JPY) and crypto (BTC, ETH, SOL). Returns conversion result in JSON. 1. convertedAmount: the resulting amount in t3 params

Use this when you need to convert between any currencies -- both fiat (USD, EUR, GBP, JPY) and crypto (BTC, ETH, SOL). Returns conversion result in JSON. 1. convertedAmount: the resulting amount in t

Parameters* required
amountnumber
Amount to convert
fromstring
Source currency code (e.g., USD, EUR, BTC, ETH)
tostring
Target currency code (e.g., EUR, GBP, USD, BTC)

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Readme

Currency Converter API

MCP Server x402 License: MIT

Fiat and crypto currency converter -- ECB rates for fiat, CoinGecko for crypto. Instant cross-rate lookup. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.

Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.

Quickstart -- MCP

Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):

{
  "mcpServers": {
    "currency-converter": {
      "url": "https://currency-converter.api.klymax402.com/mcp"
    }
  }
}

Quickstart -- HTTP (x402)

curl -X POST "https://currency-converter.api.klymax402.com/api/convert" \
  -H "Content-Type: application/json" \
  -d '{"amount":"1","from":"...","to":"..."}'
# -> 402 Payment Required, with an x402 payment challenge in the response body

View the full README on GitHub

Details

Repository
github.com/br0ski777/currency-converter-x402
Website
github.com/Br0ski777/currency-converter-x402
Category
Finance & Commerce
Transport
SSE
Registry
MCP registry, active

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