To use cURL to access the Oracle Blockchain Platform REST API:

• Install cURL, as described in Quick Start.

• Invoke cURL and specify one or more of the command-line options defined in the following table, as required, to direct its execution

  cURL Option	Description
  -d, --data @file.json	Identifies the request document, in JSON format, on the local machine.
  -H	Defines content type of the request document.
  -i	Displays response header information.
  -u, --user username:password	Specifies the user name and password for the Oracle Blockchain Platform account. Note that basic auth is not recommended. Use an OAuth 2.0 access token.
  -X	Indicates the type of request (for example, GET, POST, and so on).
  -v	Verbose

For example:

curl -v -X POST \
  "https://<rest_server_url:port>/api/v2/channels/default/chaincode-queries" \
  -H "Authorization: Bearer <Token>" \
  -H "accept: application/json" \
  -H "Content-Type: application/json" \
  --data @<file.json with the request parameters>

For a more detailed walkthrough of how to use cURL with an Oracle Cloud Infrastructure REST call, see https://www.ateam-oracle.com/post/oracle-cloud-infrastructure-oci-rest-call-walkthrough-with-curl.