Connecting to DataStax Astra Database-as-a-Service using a secure connection bundle

Use the following code snippet to connect your database:

#include <cassandra.h>
#include <stdio.h>

int main(int argc, char* argv[]) {
  /* Setup and connect to cluster */
  CassCluster* cluster = cass_cluster_new();
  CassSession* session = cass_session_new();

  /* Setup driver to connect to the cloud using the secure connection bundle */
  const char* secure_connect_bundle = "/path/to/";
  if (cass_cluster_set_cloud_secure_connection_bundle(cluster, secure_connect_bundle) != CASS_OK) {
    fprintf(stderr, "Unable to configure cloud using the secure connection bundle: %s\n",
    return 1;

  /* Set credentials provided when creating your database */
  cass_cluster_set_credentials(cluster, "username", "password");

  CassFuture* connect_future = cass_session_connect(session, cluster);

  if (cass_future_error_code(connect_future) == CASS_OK) {
    /* Use the session to run queries */
  } else {
    /* Handle error */


  return 0;

Note: cass_cluster_set_contact_points() and cass_cluster_set_ssl() should not used in conjunction with cass_cluster_set_cloud_secure_connection_bundle().