# Prerequisite

Before sending any request to Shipping 360 API, you will need to register for a Pitney Bowes account to receive an API token used for authentication.

For details refer here [Quick Overview.](/docs/)

Authentication and identification to the API is done by providing a `Bearer token` received in response of `Authorization /Token` with every request.

Requests made without a proper `Bearer token` will fail with a `401 Unauthorized error`.

#### Request for Token


```
curl --location 'https://api-sandbox.sendpro360.pitneybowes.com/auth/api/v1/token' \
--header 'Authorization: Basic MG9hMWx1czNlYnJCckNqUHIwaDg6ekdLRUNzcVhPekE0UEktdm42cm10UEhUeERNTVBFSTQzRnJEYlJpUg==' \
--header 'Content-Type: application/x-www-form-urlencoded' \
--data-urlencode 'grant_type=client_credentials' \
--data-urlencode 'scope=psapi'
```