# USD/KRW Exchange Rate Lookup

> USD/KRW Exchange Rate Lookup is a paid API for AI agents from k-data-x402-production.theblack1022.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-27).

Returns the current USD to KRW (US Dollar to South Korean Won) exchange rate sourced from ECB reference data via Frankfurter with open.er-api.com as fallback.

## Facts

- Endpoint: GET https://k-data-x402-production.theblack1022.workers.dev/api/fx/usdkrw?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-27
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/usd-krw-exchange-rate-lookup-103efda6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DRDn7hpUNxWnjmqDAIbfq

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 usd-krw-exchange-rate-lookup-103efda6
```

Example prompt: What's the current USD to KRW exchange rate — I need the latest dollar to Korean Won rate right now.

## When to prefer this

Choose this endpoint when you specifically need the USD/KRW currency pair rate sourced from ECB reference data (a reputable, stable source). Ideal for applications targeting the South Korean market, Korea-focused financial tools, or when ECB reference rates are preferred over commercial spot rates. The dual-source fallback improves reliability over single-provider alternatives.

## Known failure modes

- Both upstream providers (Frankfurter and open.er-api.com) unavailable — service returns an error
- Payment of $0.005 USDC not completed — 402 Payment Required response
- Rate data may be slightly delayed relative to live spot market prices
- Network timeout from upstream ECB/Frankfurter data source

## How this service works

Current USD/KRW exchange rate (ECB reference via Frankfurter, fallback open.er-api.com).

## Output

Returns the current USD to KRW exchange rate as a numeric value, sourced from ECB reference data (Frankfurter API) with a fallback to open.er-api.com if the primary source is unavailable. Typically includes the rate value and may include a timestamp or source indicator.

## 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",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/usd-krw-exchange-rate-lookup-103efda6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from k-data-x402-production.theblack1022.workers.dev](https://www.zero.xyz/host/k-data-x402-production.theblack1022.workers.dev/llms.txt)