Currency Converter API

io.github.Br0ski777Published by GitHub account Br0ski777v1.1.0Updated Oct 24, 2026

Fiat and crypto currency conversion — ECB + CoinGecko rates. x402 micropayment.

VerifiedSSEWeb executableFinanceBusiness & Commerce

Overview

AI-generated overview

A remote MCP server that converts amounts between fiat and crypto currencies using ECB and CoinGecko rates, billed per call via x402 micropayments.

What you can do
Convert an amount between fiat currencies and cryptocurrencies in a single call, returning the converted amount, exchange rate, rate source and timestamp.
When to use it
Useful for international pricing, invoice generation, or valuing a portfolio in a local currency when an assistant needs quick fiat-to-fiat or fiat-to-crypto conversions.
Requirements
A remote MCP endpoint; no API key or signup. Each call is paid per use in USDC on the Base L2 network through the x402 protocol, so an x402-capable client with a funded wallet is needed.
Before you install
Every conversion is a paid call (listed at $0.003) settled in USDC on Base, so the assistant can spend real money; a wallet and payment signing are involved. Rates come from third-party sources (ECB, CoinGecko) and are not market data, charts, swap quotes or wallet balances.

Installation

In SourceWeft

  1. Open Currency Converter API in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via SSE. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.github.Br0ski777%2Fcurrency-converter/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

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

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.):

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

Quickstart -- HTTP (x402)

bash
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

Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.

Tools

ToolMethodPathPriceDescription
finance_convert_currencyPOST/api/convert$0.003Convert between fiat currencies and cryptocurrencies

finance_convert_currency

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.

Parameters

NameTypeRequiredDescription
amountnumberyesAmount to convert
fromstringyesSource currency code (e.g., USD, EUR, BTC, ETH)
tostringyesTarget currency code (e.g., EUR, GBP, USD, BTC)

Returns

  • convertedAmount -- the resulting amount in target currency
  • exchangeRate -- the rate used for conversion
  • from -- source currency code
  • to -- target currency code
  • amount -- original amount provided
  • rateSource -- data source used (ECB for fiat, CoinGecko for crypto)
  • timestamp -- when the rate was fetched

Example response:

json
{"convertedAmount":2815.40,"exchangeRate":0.9218,"from":"USD","to":"EUR","amount":3054.00,"rateSource":"ECB","timestamp":"2026-04-13T12:00:00Z"}

When to use: price conversions across fiat and crypto in a single call. Essential for international pricing, invoice generation, and portfolio valuation in local currency.

Not for: market data or charts (use finance_get_token_price), DeFi swap quotes (use dex_get_swap_quote), wallet balances (use wallet_get_portfolio).

Example agent prompts

  • "Convert between any currencies -- both fiat (USD, EUR, GBP, JPY) and crypto (BTC, ETH, SOL)"

Payment

  • Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
  • Network: Base L2 (eip155:8453)
  • Asset: USDC
  • Facilitator: Coinbase CDP (primary), PayAI (fallback)

Part of klymax402

100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.

License

MIT

Source: README.md at commit 5a6302f

Tools

0
SourceWeft has not read this server's tools yet.

Version history

1
  1. v1.1.0LatestSep 16, 2026

Score

50% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts

    Keep the endpoint answering the MCP handshake; SourceWeft probes it every 30 days.

  • Auth declaredRequired10 pts

    Declare the credential headers in the registry entry, or keep the endpoint answering the probe so its auth can be classified.

  • Tools listed15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts