PASAR API

🇯🇵 National Tax Agency ~ corporate number API

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Free application ID required per request; returns official 13-digit corporate numbers as CSV/XML under CC BY 4.0.

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# National Tax Agency ~ corporate number API needs an API key ~ get yours at:
# https://www.houjin-bangou.nta.go.jp/webapi/
curl 'https://api.houjin-bangou.nta.go.jp/4/num' \
  -H 'Authorization: Bearer YOUR_TOKEN'

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I'm integrating a Japan API into my app.

API: National Tax Agency ~ corporate number API
Provider: National Tax Agency (国税庁)
Auth: requires an API key (sign up: https://www.houjin-bangou.nta.go.jp/webapi/)
Pricing: free
Base URL: https://api.houjin-bangou.nta.go.jp/4/num
Important note: Free application ID required per request; returns official 13-digit corporate numbers as CSV/XML under CC BY 4.0.

Source: National Tax Agency (国税庁) (https://www.houjin-bangou.nta.go.jp/webapi/)
Source type: Official open-data catalogue
Endpoint type: Open-data catalogue JSON
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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