PASAR API

🇯🇵 PostcodeJP ~ Japanese postal code & address API

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Managed, CORS-enabled postal-code lookup with English/Japanese fields; free tier plus paid plans.

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# PostcodeJP ~ Japanese postal code & address API needs an API key.
# No single public base URL ~ start from the docs:
# https://api-doc.postcode-jp.com/

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I'm integrating a Japan API into my app.

API: PostcodeJP ~ Japanese postal code & address API
Provider: PostcodeJP
Auth: requires an API key (sign up: https://api-doc.postcode-jp.com/)
Pricing: freemium
Important note: Managed, CORS-enabled postal-code lookup with English/Japanese fields; free tier plus paid plans.

Source: PostcodeJP (https://api-doc.postcode-jp.com/)
Source type: Provider API or developer docs
Endpoint type: Docs-first integration
Integration difficulty: Needs API key
Last checked: 2026-07-05
Production caveat: Keep credentials server-side and confirm current limits, pricing, and webhook/error behaviour in the provider docs.

Help me set up the correct onboarding/authentication path and make the first valid request ~ explain exactly where credentials go and what must happen before production.

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