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PennyRail FX Currency Conversion
x402
PennyRail FX Currency Conversion is a paid API for AI agents from pennyrail.vercel.app, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).
Converts an amount between two currencies using live exchange rates, returning the converted value via a paid settlement endpoint.
Price / call$0.003
Success—
StatusUnknown
How this service works
Machine-readable settlement service
Output
Returns the converted currency amount and the exchange rate applied between the source and target currency pair, as a JSON object.
Example use cases
Travel budget currency conversion
“I'm heading to Japan next month — how much would 2000 US dollars be in Japanese yen at today's rate?”
E-commerce international pricing
“What's the current EUR to GBP exchange rate? I need to price a product in British pounds that costs 49.99 euros.”
Cross-border invoice settlement
“I need to pay a Canadian supplier 3500 CAD — how much is that in US dollars right now?”
Technical details
Endpoint
POSThttps://pennyrail.vercel.app/api/p/network/fx.convert--exchange-rateWhen to prefer
Use this endpoint when you need a quick, pay-per-call FX conversion without managing API keys or subscriptions — ideal for agents that only occasionally need currency conversion and want a low-friction, micro-payment-gated lookup via x402 protocol.
Side effects
- Unsupported currency code returns an error or empty result
- Payment of 0.003 USDC not fulfilled causes HTTP 402 and no data returned
- Malformed input object causes validation failure
- Rate data temporarily unavailable due to upstream FX feed outage
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
Schema · Response
{
"type": "object",
"additionalProperties": true
}Tags
x402
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