curl --request GET \
  --url https://matcher.sandbox.lerian.net/v1/reports/contexts/{contextId}/dashboard/volume \
  --header 'Authorization: Bearer <token>'

{
  "matchedAmount": "<string>",
  "matchedTransactions": 123,
  "periodEnd": "<string>",
  "periodStart": "<string>",
  "totalAmount": "<string>",
  "totalTransactions": 123,
  "unmatchedAmount": "<string>",
  "unmatchedCount": 123
}