# Cek NIK — Zapi reference

> Decode structural information from a 16-digit Indonesian NIK identifier.

**Base URL:** `https://api.zpi.web.id`
**Auth:** Send `x-api-key: YOUR_KEY` header on every request. Get a free key at https://zpi.web.id/dashboard/keys.
**Response envelope:** `{ status, message, content }`
**Rate limit:** 60 req/min on free tier.

**Related:**
- Detail page: https://zpi.web.id/api/indonesia/cek-nik
- Endpoint catalog: https://zpi.web.id/category/indonesia
- Concise index: https://zpi.web.id/llms.txt
- Full reference: https://zpi.web.id/llms-full.txt

---

## Cek NIK

**Category:** indonesia · **Slug:** `cek-nik`
**Detail page:** https://zpi.web.id/api/indonesia/cek-nik

Decode structural information from a 16-digit Indonesian NIK identifier.

**Tags:** utility, nik, indonesia, ktp

### Decode NIK

Decode province, district, birth date, and gender from NIK.

- **Method:** `GET`
- **Endpoint:** `https://api.zpi.web.id/v1/indonesia:cek-nik/decode`
- **Cache TTL:** 300s

**Parameters:**

| Name | Type | Location | Required | Description |
|------|------|----------|----------|-------------|
| `nik` | string | query | yes | NIK KTP Indonesia (16 digit angka) |

**cURL:**
```bash
curl "https://api.zpi.web.id/v1/indonesia:cek-nik/decode?nik=3201011503900001" \
  -H "x-api-key: YOUR_API_KEY"
```

**JavaScript / TypeScript:**
```javascript
const res = await fetch("https://api.zpi.web.id/v1/indonesia:cek-nik/decode?nik=3201011503900001", {
  headers: { "x-api-key": process.env.ZAPI_KEY }
});
const data = await res.json();
```

**Python:**
```python
import requests
r = requests.get("https://api.zpi.web.id/v1/indonesia:cek-nik/decode?nik=3201011503900001",
  headers={"x-api-key": "YOUR_API_KEY"})
data = r.json()
```

**Example response:**
```json
{
  "ok": true,
  "nik": "3201011503900001",
  "birth": {
    "day": 15,
    "date": "1990-03-15",
    "year": 1990,
    "month": 3
  },
  "valid": true,
  "gender": "LAKI-LAKI",
  "source": "algorithmic",
  "kec_code": "01",
  "province": "Jawa Barat",
  "sequence": "0001",
  "kab_kota_code": "01",
  "province_code": "32"
}
```

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_Generated: 2026-08-02T14:28:45.808Z_