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Authentication should be done with API clients, use the client_id/client_secret from the Checkout API client to get an access token (see Get token endpoint). Read more about how to set the basic auth Authorization header at wikipedia.


POST{ACCOUNT_ID}/auth/token Get token

Authorization: Basic base64{client_id:client_secret}
"grant_type": "client_credentials",
"audience": "{ACCOUNT_ID}"


"access_token": "eyJhbGci...t7P4",
"token_type": "Bearer",
"expires_in": 86400

Use the access_token returned from Get token as JWT Bearer Authorization when accessing the API.