# x402-toolbox Crypto-Fiat Exchange Rate

> x402-toolbox Crypto-Fiat Exchange Rate is a paid API for AI agents from x402-toolbox.shablony-pro.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-01).

Returns the current exchange rate between a cryptocurrency and a fiat currency, paid per-call via x402 USDC micropayment on Base.

## Facts

- Endpoint: GET https://x402-toolbox.shablony-pro.workers.dev/finance/crypto-fiat-exchange-rate?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-toolbox-crypto-fiat-exchange-rate-8e0620ac
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4TLyEqYli7fTzRuVex2I3

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-toolbox-crypto-fiat-exchange-rate-8e0620ac
```

Example prompt: What is the current exchange rate between Bitcoin and USD? Pay for the lookup using x402 USDC.

## When to prefer this

Prefer this endpoint when you need a quick, low-cost, no-signup crypto-to-fiat rate lookup paid per-call via x402 micropayment on Base, and do not want to manage API keys or subscriptions. Best for agents that already support x402 payment flows and need deterministic, pay-as-you-go pricing at $0.002 USDC per call.

## Known failure modes

- Payment not received — 402 response returned if x402 USDC micropayment is not completed
- Invalid or unsupported currency pair — returns an error or empty result
- Network timeout on Cloudflare Worker — transient 5xx error
- Malformed schema parameter — may return a 400 or unexpected result

## How this service works

309 deterministic pay-per-call tools for AI agents over x402 (USDC, Base). No signup, no API key: the payment is the identity.

## Output

Returns a JSON object with ok and paid status fields, and the current exchange rate value for the requested cryptocurrency-to-fiat currency pair.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "schema": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "paid": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-toolbox-crypto-fiat-exchange-rate-8e0620ac/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-toolbox.shablony-pro.workers.dev](https://www.zero.xyz/host/x402-toolbox.shablony-pro.workers.dev/llms.txt)