1. Integration key
An integration key is a long-lived secret that is exchanged for a short-lived access token.
Create a key
Section titled “Create a key”-
Open Settings → Company.

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Go to the Integration keys section.

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Click New key and enter a name — for example,
online-storeor1C exchange.

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Copy the key from the list.

Together with the key, its role is created — it already includes two permissions: “View and search products in the catalog” and “Ability to view the customer list”.
Which methods are available to the key — see the list of routes; what
each role access toggle changes — see key role permissions. If a method responded
with 403, see understanding 403 and 404.
Next: first request.