Request URL
https://api-m.paypal.com/v1/oauth2/token

Method
Post

Headers
Authorization: Basic xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx  // xxxxxxxxxxxxxxxx  is base64 encoded Client ID:Secret  // base64_encode(client_id_string:client_secret_string) – note the colon in between

Body
grant_type:client_credentials

Return

{

"scope": "https://uri.paypal.com/services/invoicing https://uri.paypal.com/services/disputes/read-buyer https://uri.paypal.com/services/payments/realtimepayment https://uri.paypal.com/services/disputes/update-seller https://uri.paypal.com/services/payments/payment/authcapture openid https://uri.paypal.com/services/disputes/read-seller https://uri.paypal.com/services/payments/refund https://api.paypal.com/v1/vault/credit-card https://api.paypal.com/v1/payments/.* https://uri.paypal.com/payments/payouts https://api.paypal.com/v1/vault/credit-card/.* https://uri.paypal.com/services/subscriptions https://uri.paypal.com/services/applications/webhooks",
"access_token": "AYYYYYYYYYYWmTopNAjV__Yuk_6AP9RZWQpzxxxxxxxxxxxxxx1ifvHLHrE6RW_Zqjbieo3jcZr9999999999999999lyDA",
"token_type": "Bearer",
"app_id": "APP-XYXYXYXYXYXYCCCC",
"expires_in": 32400,
"nonce": "2021-06-18T16:42:YUKJUKJHTGTYJKHGRRFHFHFGFGBFBG-spy-N9iguUHTJbTgVjht"

}