Create an API key in the panel under Settings → API keys. It is shown once — copy it then.
Press Authorize below (the green button, right of Servers).
Paste the token on its own — noBearer prefix, Swagger adds it. Then Close.
Execute sends a real request to https://api.nsin.cloud — this is not a
sandbox. GET calls are safe to explore; the money endpoints
(credit, services, change-plan) move real Rials.
Handing this API to an AI? Give it https://nsin.cloud/docs/openapi.yaml