# FastX402 Currency Converter

> FastX402 Currency Converter is a paid API for AI agents from fastx402.tools, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-27).

Converts a specified amount from one ISO 4217 currency to another and returns the exchange rate and converted amount

## Facts

- Endpoint: GET https://fastx402.tools/currency-convert?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-27
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fastx402-currency-converter-2f7a5b22
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_YdIYUM9BYAhxSUIEAXrK4

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 fastx402-currency-converter-2f7a5b22
```

Example prompt: Can you convert 250 USD to EUR for me and tell me the current exchange rate?

## When to prefer this

Choose this endpoint when you need a lightweight, no-account, pay-per-call currency conversion with a clear amount, source, and target currency — especially in agent workflows where avoiding API key management is desirable and USDC micropayments via x402 are acceptable. Good for one-off conversions at $0.003 per call.

## Known failure modes

- Invalid or unsupported ISO 4217 currency code returns an error
- Amount provided as zero or negative may be rejected
- Non-numeric or malformed amount string causes a bad request error
- Unsupported currency pair may not have a rate available
- Payment not made or payment failure results in HTTP 402 response

## How this service works

200 pay-per-call tools for AI agents, from $0.001 per request in USDC on Base or Solana with x402. No account, no API key.

## Output

A JSON object containing the source currency code (from), target currency code (to), the exchange rate (rate), the original amount, and the converted amount — e.g. {"from":"USD","to":"EUR","rate":0.92,"amount":100,"converted":92}

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "amount",
      "from",
      "to"
     ],
     "properties": {
      "to": {
       "type": "string",
       "description": "Target currency code, ISO 4217, e.g. EUR"
      },
      "from": {
       "type": "string",
       "description": "Source currency code, ISO 4217, e.g. USD"
      },
      "amount": {
       "type": "string",
       "description": "Positive amount to convert, e.g. 100 or 12.5"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "to": {
       "type": "string"
      },
      "from": {
       "type": "string"
      },
      "rate": {
       "type": "number"
      },
      "amount": {
       "type": "integer"
      },
      "converted": {
       "type": "integer"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "to": "EUR",
  "from": "USD",
  "rate": 0.92,
  "amount": 100,
  "converted": 92
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fastx402-currency-converter-2f7a5b22/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from fastx402.tools](https://www.zero.xyz/host/fastx402.tools/llms.txt)