Messtone LLC Manages Devices Enables,how it all fits together using curl: curl -H ‘Authorization:Basic BASE64_ENCODED(PUBLIC_KEY:PRIVATE_KEY)’ -H ‘Braintree-Version:2019-01-01’ -H ‘Content-Type:application/json’ -X POST https://payments.sandbox.braintree-api.com/graphql -d ‘{“query”:”query{ping}”}’ Response {“data”:{“ping”:”pong”},”extensions”:{“requestId”:”a-uuid-for-the-request”}}