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2s Currency Conversion API
x402
2s Currency Conversion API is a paid API for AI agents from 2s.io, paid per call via x402, $0.00144/call, status unknown (last checked 2026-09-14).
Converts an amount from one currency to another using live or historical ECB exchange rates
Price / call$0.00144
Success—
StatusUnknown
How this service works
The (most) everything API: 575+ pay-per-call endpoints for AI agents — ground-truth data, a full AI gateway, and agent infrastructure (storage, queues, watchers). USDC via x402, no signup, no API keys, and upto billing: pay actual usage, not the quote.
Output
Returns the exchange rate between the two specified currencies, the converted result amount, the date of the rate used, and the data source (European Central Bank via Frankfurter). For historical queries, the rate date reflects the closest available ECB rate to the requested date.
Example use cases
Example prompt
“What's 250 USD worth in EUR right now — and what was that same conversion worth on 2024-03-01?”
Technical details
Endpoint
GEThttps://2s.io/api/convert/currencyWhen to prefer
Choose this endpoint when you need reliable, ECB-sourced exchange rates for fiat currencies, especially EUR-anchored pairs, with optional historical date lookup. Best for financial calculations, invoice conversion, or compliance use cases where ECB reference rates are preferred. Not suitable for cryptocurrency pairs or real-time tick-by-tick forex data.
Side effects
- Invalid or unsupported ISO 4217 currency code returns an error — only currencies covered by ECB reference rates are supported
- Date too far in the past may not have available ECB data
- Missing required 'from' or 'to' query parameters causes a 400-level error
- Payment failure (insufficient USDC balance) blocks the request via x402 protocol
Input
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"to": "EUR",
"from": "USD",
"amount": 250
}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
{
"data": {
"rate": 0.86272,
"query": {
"to": "EUR",
"date": null,
"from": "USD",
"amount": 250
},
"result": 215.68,
"source": {
"url": "https://www.frankfurter.dev/",
"license": "Public data (ECB reference rates)",
"provider": "European Central Bank reference rates (via Frankfurter)"
},
"rateDate": "2026-06-17"
},
"meta": {
"cost": {
"usd": 0.00144,
"tier": 0
},
"caller": "x402",
"version": null,
"endpoint": "convert.currency",
"settlement": {
"txHash": "0x15f705d8868606649d562b98785ffdbe51b61e4862ce270e7bdd23f48a56a618",
"network": "eip155:8453",
"success": true
}
}
}Tags
x402
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