curl -X POST "https://server.smartlead.ai/api/v1/campaigns/update-lead-email-account?api_key=YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "email_account_id": 999,
    "email_campaign_id": 123,
    "email_lead_id": 789,
    "override_lead_email_account": true
  }'

import requests

def update_lead_sending_account(campaign_id, lead_id, new_account_id):
    payload = {
        "email_account_id": new_account_id,
        "email_campaign_id": campaign_id,
        "email_lead_id": lead_id,
        "override_lead_email_account": True
    }
    
    response = requests.post(
        "https://server.smartlead.ai/api/v1/campaigns/update-lead-email-account",
        params={"api_key": "YOUR_API_KEY"},
        json=payload
    )
    
    if response.status_code == 200:
        print(f"✅ Lead {lead_id} now uses account {new_account_id}")
    
    return response.json()

update_lead_sending_account(123, 789, 999)

{
  "success": true,
  "message": "Lead email account updated"
}