curl --location --request POST 'https://api.peiperless.com/api/v1/agents' \
--header 'Authorization: Bearer [ACCESS_TOKEN]' \
--header 'Content-Type: text/plain' \
--data-raw '{
"firstname": "Juan",
"lastname": "Pérez",
"phone": "+34600000000",
"external_id": "EXT123",
"email": "juan.perez@ejemplo.com",
"company_id": 129
}'{}