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QuantaFlow Rapid Multi-Currency Crypto Exchange Rates API
x402
QuantaFlow Rapid Multi-Currency Crypto Exchange Rates API is a paid API for AI agents from quanta-roan.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-12).
Fetches real-time multi-currency cryptocurrency exchange rates via an x402 pay-per-call gateway
Price / call$0.01
Success—
StatusUnknown
How this service works
Every request, a quantum of value. x402 protocol-based payment endpoint for web3/DeFi tools.
Output
Returns real-time cryptocurrency exchange rate data for multiple currency pairs, including current prices and conversion rates sourced from the upstream Rapid API crypto exchange rates service, passed through after successful x402 micropayment.
Example use cases
Live crypto portfolio valuation
“Get me the current exchange rates for BTC, ETH, and SOL in USD so I can calculate my portfolio value.”
DeFi arbitrage rate check
“What are the latest exchange rates for USDC, DAI, and USDT against ETH right now? I need to check for arbitrage opportunities.”
Multi-currency crypto price dashboard
“Fetch real-time exchange rates for the top 5 cryptocurrencies in both USD and EUR for my trading dashboard.”
Technical details
Endpoint
POSThttps://quanta-roan.vercel.app/api/service/rapid-multi-currency-crypto-exchange-rates-api?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need real-time multi-currency cryptocurrency exchange rates in a web3 or DeFi context and are comfortable with x402 micropayment settlement in USDC. Prefer this over free alternatives when you need pay-per-call pricing with no subscription overhead, or when building agents that require autonomous micropayment-native API access on Base or other EVM chains.
Side effects
- Payment failure: insufficient USDC balance or x402 payment rejected, resulting in 402 Payment Required
- Upstream API unavailable: the proxied exchange rate service is down, returning a 502 or 503
- Invalid currency pair: queried crypto or fiat symbol not supported by upstream, returning an error or empty result
- Malformed request body: incorrect JSON structure passed in the body field causing upstream rejection
- Rate limit exceeded on upstream API causing throttled or failed responses
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| body | string | Optional JSON body forwarded to POST requests. |
| path | string | Path below the selected upstream origin. |
| query | object | |
| method | string |
Output
Schema · Response
{
"description": "The upstream response body and content type are passed through after successful payment."
}Tags
x402
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