# QuantaFlow Rapid Currency Conversion & Exchange Rates

> QuantaFlow Rapid Currency Conversion & Exchange Rates 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).

Provides rapid currency conversion and live exchange rate lookups via a pay-per-call x402 gateway at $0.01 USDC per request.

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/rapid-currency-conversion-and-exchange-rates?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quantaflow-rapid-currency-conversion-exchange-rates-20bb16e0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7aCb8twXkCcUJxC03cH_T

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability quantaflow-rapid-currency-conversion-exchange-rates-20bb16e0 -d '<json body>'
```

Example prompt: Can you convert 250 USD to EUR using the QuantaFlow currency conversion service and tell me the current exchange rate?

## When to prefer this

Choose this endpoint when you need a lightweight, pay-per-call currency conversion or exchange rate lookup without a subscription, especially in web3/DeFi contexts where paying in USDC via x402 is preferred. Ideal for agents that only occasionally need forex data and want to avoid monthly API key management.

## Known failure modes

- Payment failure: insufficient USDC balance or x402 payment not accepted — request rejected before proxying
- Invalid currency code: upstream returns error if source or target currency code is unrecognized
- Upstream service unavailable: gateway passes through 5xx errors from the forex data provider
- Malformed request body: incorrect JSON in body parameter causes upstream rejection
- Rate limiting: upstream provider may throttle repeated requests in rapid succession

## How this service works

Every request, a quantum of value. x402 protocol-based payment endpoint for web3/DeFi tools.

## Output

Returns the upstream currency conversion or exchange rate response, including the converted amount and/or current rate for the requested currency pair, passed through directly from the upstream forex data provider after the $0.01 USDC x402 payment is processed.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "body": {
   "type": "string",
   "description": "Optional JSON body forwarded to POST requests."
  },
  "path": {
   "type": "string",
   "description": "Path below the selected upstream origin."
  },
  "query": {
   "type": "object"
  },
  "method": {
   "enum": [
    "GET",
    "POST"
   ],
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "description": "The upstream response body and content type are passed through after successful payment."
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/quantaflow-rapid-currency-conversion-exchange-rates-20bb16e0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from quanta-roan.vercel.app](https://www.zero.xyz/host/quanta-roan.vercel.app/llms.txt)