# x402 AI Gateway – ARS/BIF Currency Conversion

> x402 AI Gateway – ARS/BIF Currency Conversion is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.0002/call, status unknown (last checked 2026-10-12).

Converts an amount from Argentine Peso (ARS) to Burundian Franc (BIF) via a micropayment-gated AI gateway endpoint.

## Facts

- Endpoint: POST https://api.fastapi.online/f/fx/ars/bif?utm_source=zero.xyz
- Price: $0.0002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-ai-gateway-ars-bif-currency-conversion-452b7414
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_viKc3soIlm9DgbUSEf09t

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-bif-currency-conversion-452b7414 -d '<json body>'
```

Example prompt: Convert 500 Argentine Pesos to Burundian Francs for me — this is going through an x402 micropayment gateway so authorize the $0.0002 USDC fee on Base.

## When to prefer this

Use this endpoint when you specifically need ARS (Argentine Peso) to BIF (Burundian Franc) conversion and are operating within an x402 micropayment-capable agent that can authorize USDC payments on Base. Prefer this over general FX APIs when you want a pay-per-call model with no API key management and are already using the x402 payment protocol.

## Known failure modes

- Payment not authorized: x402 micropayment not completed, gateway returns 402 Payment Required
- Invalid amount: non-numeric or negative amount returns validation error
- Exchange rate unavailable: underlying FX data source may be unreachable or stale
- Network timeout: self-hosted gateway may be unavailable intermittently
- Insufficient USDC balance: wallet lacks funds for $0.0002 micropayment on Base

## How this service works

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

## Output

Returns a JSON object containing the converted currency value and potentially exchange rate details for the ARS to BIF conversion. The response schema is an open object, so exact fields may vary but should include the equivalent amount in Burundian Francs.

## 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-bif-currency-conversion-452b7414/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)