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FX Pulse – Stablecoin & Fiat FX Reference Rates
x402
FX Pulse – Stablecoin & Fiat FX Reference Rates is a paid API for AI agents from fx-pulse-chi.vercel.app, paid per call via x402, $0.015/call, status unknown (last checked 2026-10-16).
Returns real-time FX reference rates between fiat currencies and major stablecoins (USDC, EURC, USDT) for a given base/quote pair or batch of up to 20 targets.
Price / call$0.015
Success—
StatusUnknown
How this service works
Single-pair rate, amount conversion, and batch FX rates for fiat currencies and major stablecoins (USDC, EURC, USDT...). Pay-per-call in USDC via x402 on Base.
Output
A JSON object containing the base currency code, the date of the rate snapshot, and a 'rates' map of each requested quote currency code to its numeric exchange rate (e.g. {"base":"USDC","date":"2026-09-19","rates":{"EUR":0.92,"GBP":0.79,"JPY":147.3}}).
Example use cases
Stablecoin cross-border payment pricing
“I'm about to send a USDC payment to a supplier in Japan — what's the current USDC to JPY reference rate so I can quote them the right amount?”
Multi-currency wallet dashboard
“Show me today's FX Pulse rates for USDC against EUR, GBP, SGD, and VND so I can update my wallet's display balances.”
Stablecoin invoice conversion
“I need to invoice a client in Euros but I'm billing in EURC — what's the current EURC to EUR rate so I can set the right amount on the invoice?”
Technical details
Endpoint
GEThttps://fx-pulse-chi.vercel.app/api/rates?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need real-time FX reference rates specifically covering major stablecoins (USDC, EURC, USDT) alongside fiat currencies, and especially when operating in a pay-per-call crypto-native environment using x402 on Base. It is ideal for agents handling stablecoin payments, DeFi workflows, or multi-currency invoicing where stablecoin-to-fiat rates are a first-class requirement.
Side effects
- Unsupported currency code returns an error or omits that pair from the response
- Exceeding 20 quote currencies may result in a validation error
- Payment failure via x402/USDC may block the request entirely
- Network or upstream rate feed outage may return stale or unavailable rates
- Malformed base/quote parameters return a 400-level error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| base | string | Base currency (ISO-4217) or stablecoin ticker. |
| quotes | array | Up to 20 target currency/stablecoin codes. |
Output
Schema · Response
{
"type": "json",
"example": {
"base": "USDC",
"date": "2026-09-19",
"rates": {
"EUR": 0.92,
"GBP": 0.79,
"JPY": 147.3,
"VND": 25400
}
}
}Tags
x402
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