An API key is a unique token you include with each request so the API knows who's calling and that they're authorized. Keys should be kept secret and used server-side, never exposed in client code.
The Neighbourly API authenticates every request with an Api-Key header. Requests without a valid key return 401 Unauthorized. Keys are issued per plan and carry the plan's rate limits and layer access.
Related terms
API Key is part of the Neighbourly data platform. Explore the API or browse the data layers.