# Korean Business Day Calendar – Add N Business Days

> Korean Business Day Calendar – Add N Business Days is a paid API for AI agents from x402.pokt-agent.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-12).

Given a start date and an integer offset, returns the Korean business calendar date N working days later (or earlier), skipping Korean public holidays.

## Facts

- Endpoint: GET https://x402.pokt-agent.com/kr-calendar/add?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/korean-business-day-calendar-add-n-business-days-53222b02
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_K7BaXYR1L_tqvbD-bwgoL

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 korean-business-day-calendar-add-n-business-days-53222b02
```

Example prompt: What Korean business date is 5 working days after 2026-09-23? Use the Korean holiday calendar to skip any public holidays.

## When to prefer this

Use this endpoint when you need to compute a future or past Korean business date relative to a given start date, specifically accounting for Korean public holidays (e.g. Chuseok, Seollal, national holidays). Prefer this over generic business-day calculators when Korean holiday accuracy is critical — e.g. for Korean legal deadlines, financial settlement dates, or supplier contract terms. It requires no API key and charges $0.005 USDC per call via the x402 protocol on Base.

## Known failure modes

- Missing required query parameter 'date' or 'n' returns a validation error
- Malformed date format (not YYYY-MM-DD) causes a parse error
- Non-integer value for n causes a validation error
- Payment failure via x402/USDC results in 402 response and no data returned
- Dates far in the future may not have holiday data populated, returning incomplete results

## How this service works

Pay-per-call Korean company due diligence, company ID crosswalk, sanctions screening with Korean name variants, Upbit/Bithumb risk events, HWP to Markdown, business status, business-day calendar, address normalisation, law, rates, filings and more. No account or API key: pay each call in USDC on Base via x402.

## Output

A JSON object containing: the requested offset n, the start date, the computed result date (YYYY-MM-DD), and an array of holidays_skipped listing any Korean public holidays (with Korean names) that were bypassed in the calculation.

## 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": [
      "date",
      "n"
     ],
     "properties": {
      "n": {
       "type": "string",
       "description": "integer, negative for earlier"
      },
      "date": {
       "type": "string",
       "description": "YYYY-MM-DD"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "n": 1,
  "start": "2026-09-23",
  "result": "2026-09-28",
  "holidays_skipped": [
   "2026-09-24 추석",
   "2026-09-25 추석",
   "2026-09-26 추석"
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/korean-business-day-calendar-add-n-business-days-53222b02/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.pokt-agent.com](https://www.zero.xyz/host/x402.pokt-agent.com/llms.txt)