# x402 AI Gateway — ARS to BRL Currency Converter

> x402 AI Gateway — ARS to BRL Currency Converter is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.0002/call, status unknown (last checked 2026-09-12).

Converts Argentine Peso (ARS) to Brazilian Real (BRL) at the current exchange rate, gated by an x402 USDC micropayment on Base.

## Facts

- Endpoint: POST https://api.fastapi.online/f/fx/ars/brl
- Price: $0.0002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-ai-gateway-ars-to-brl-currency-converter-aeab018c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_WNegYSHPDB0GRGiNP589v

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 x402-ai-gateway-ars-to-brl-currency-converter-aeab018c -d '<json body>'
```

Example prompt: Convert 2500 Argentine pesos to Brazilian reais for me right now.

## When to prefer this

Choose this endpoint when you need a lightweight, pay-per-call ARS-to-BRL conversion without a subscription or API key — ideal for agents that occasionally need Latin American currency conversion and want to pay micro-fractions of a cent per lookup via USDC on Base.

## Known failure modes

- Invalid or negative amount input — may return error or zero result
- Service unavailable if the self-hosted gateway is down
- x402 payment failure if USDC balance on Base is insufficient — returns HTTP 402
- Empty or malformed response if exchange rate data source is unavailable
- Rate limiting if too many consecutive calls are made

## How this service works

Self-hosted AI API gateway. Expensive endpoints require an x402 micropayment (USDC on Base) before executing.

## Output

Returns an object containing the converted currency value from ARS to BRL, reflecting the current exchange rate applied to the requested amount.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "amount": {
   "type": "number",
   "description": "Amount of the source currency to convert (default 1)"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-ai-gateway-ars-to-brl-currency-converter-aeab018c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.fastapi.online](https://www.zero.xyz/host/api.fastapi.online/llms.txt)