To use a newer version of the API you can use a custom HTTP header specifying the API version you would like to request. This allows you to stay on an older version and test your development environments against new versions.

The fidel-version header allows you define in each request the version of the endpoint output. You can specify the current version or newer versions of the API.

Check the version log for more information about available versions. To upgrade your environment to a newer version, go to https://dashboard.fidel.uk/account.

curl -X GET \
  https://api.fidel.uk/v1/transactions/9cc66ebe-8a18-4a00-b9cb-e1802bc6709d \
  -H 'content-type: application/json' \
  -H 'fidel-key: sk_test_50ea90b6-2a3b-4a56-814d-1bc592ba4d63' \
  -H 'fidel-version: 2019-03-05'