level query param; the response is capped at
your organization’s granted level.
Every lookup needs an API key. L1 is free (no credits). L2–L3 are commercial
(consume credits).
Example
L3 response
Sample postcodes
These are live postcodes for use with a live key (
nipost_live_…). They
do not resolve under a test key — a test key
reads a separate sandbox dataset. For codes that work with a test key, see the
sandbox postcodes (or call search/autocomplete
with your test key to discover more).
Need a higher level? Request it under Settings → KYB & Access in the dashboard.

