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Currency Converter API

Registre officiel Finance et paiements

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

Code source Site web Documentation

Installation

Ajoutez ceci à la configuration MCP de votre client (Claude Desktop : claude_desktop_config.json ; Cursor : .cursor/mcp.json ; VS Code et les autres utilisent la même forme « mcpServers »).

Remote (sse)
Claude Code 
claude mcp add --transport sse currency-converter-api 'https://currency-converter.api.klymax402.com/mcp'
Configuration JSON (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "currency-converter-api": {
            "type": "sse",
            "url": "https://currency-converter.api.klymax402.com/mcp"
        }
    }
}

Documentation

Tirée du README du projet sur GitHub, actualisée chaque semaine. Les liens ouvrent GitHub.

Sommaire
  1. Currency Converter API
  2. Quickstart -- MCP
  3. Quickstart -- HTTP (x402)
  4. Tools
  5. Example agent prompts
  6. Payment
  7. Part of klymax402
  8. License

Currency Converter API

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

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:

{"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

Questions fréquentes

Qu'est-ce que Currency Converter API ?

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

Comment installer Currency Converter API ?

Il fonctionne comme serveur distant. Dans Claude Code : claude mcp add --transport sse currency-converter-api 'https://currency-converter.api.klymax402.com/mcp'. Pour les autres clients, collez la configuration JSON de cette page dans leurs réglages MCP.

Faut-il une clé API pour Currency Converter API ?

Son entrée au registre n'indique aucune clé ni secret obligatoire. Certaines fonctions peuvent tout de même demander un compte auprès du service auquel il se connecte.

Currency Converter API est-il open source ?

Oui. Son code est sur GitHub sous licence MIT.

Qui maintient Currency Converter API ?

Il est publié par Br0ski777. AI.tn le référence sans le maintenir ni le recommander.

Issu du registre MCP officiel. Être listé n'est pas une recommandation : vérifiez le code et les permissions d'un serveur avant de lui donner accès à vos données.