# Japanese Postal Code Address Lookup

> Japanese Postal Code Address Lookup is a paid API for AI agents from address.agentic-jp.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).

Look up Japanese address candidates (prefecture, city, town, chome-banchi) by 7-digit postal code using Japan Post KEN_ALL data

## Facts

- Endpoint: GET https://address.agentic-jp.com/postal-code/:zip
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/address-agentic-jp-com-a9b62870
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5vKGVOvA0qEy3-atPtSsC

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 address-agentic-jp-com-a9b62870
```

Example prompt: What Japanese address does postal code 1000001 correspond to? I need the prefecture, city, and town components.

## When to prefer this

Use this endpoint when you need to resolve a Japanese 7-digit postal code to structured address components backed by authoritative Japan Post KEN_ALL data. Prefer this over generic geocoding APIs when working specifically with Japanese postal codes and needing clean prefecture/city/town decomposition with a confidence score for validation pipelines.

## Known failure modes

- Invalid or non-existent postal code returns empty candidates or error
- Postal code with wrong digit count (not 7 digits) may return 400 or empty result
- Ambiguous postal codes covering multiple towns may return multiple candidates
- Network timeout or service unavailability returns 5xx error
- Hyphen formatting edge cases may cause parse errors if not handled

## How this service works

Look up Japanese (JP) address candidates for a 7-digit postal code (郵便番号), backed by the official Japan Post KEN_ALL dataset. One postal code can map to several towns; all candidates are returned with kana readings. Use for address autofill and postal-code validation.

## Output

Returns one or more Japanese address candidates for the given postal code, including decomposed components: prefecture (都道府県), city (市区町村), town (町域), and chome-banchi notation. Includes a 0-1 confidence score and normalizes fullwidth/halfwidth digit variants and old-form kanji.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "pathParams": {
   "zip": "1000001"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/address-agentic-jp-com-a9b62870/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from address.agentic-jp.com](https://www.zero.xyz/host/address.agentic-jp.com/llms.txt)