curl --request GET \
  --url https://api.instantly.ai/api/v2/campaigns/{id}/sending-status \
  --header 'Authorization: Bearer <token>'

{
  "diagnostics": {
    "campaign_id": "019dc79a-ac0d-73af-a065-511fb3b72627",
    "subsequence_id": "019dc79a-ac0e-7a67-822c-45a452f48e53",
    "last_updated": "2026-04-26T02:24:55.822Z",
    "status": "healthy",
    "issue_tracking": {
      "current_status_code": "healthy",
      "issue_first_seen_at": "2026-04-26T02:24:55.822Z",
      "consecutive_loops_with_issue": 0,
      "last_healthy_send_at": "2026-04-26T02:24:55.822Z"
    },
    "accounts_summary": {
      "total_connected": 5,
      "available": 3,
      "unavailable": {
        "daily_limit_hit": 1,
        "slow_ramp_limit_hit": 0,
        "disconnected": 1,
        "global_gap_not_met": 0
      }
    },
    "campaign_daily_limit": {
      "limit": 100,
      "sent": 50,
      "limit_hit": false
    },
    "new_lead_limit": {
      "enabled": true,
      "limit": 50,
      "contacted": 25,
      "limit_hit": false
    },
    "schedule_status": {
      "in_schedule": true
    },
    "send_one_by_one": {
      "enabled": false,
      "single_account_per_wait_gap": false
    },
    "follow_ups_waiting": {
      "count": 10,
      "earliest_wait_time_seconds": 3600
    },
    "esp_routing_status": {
      "enabled": false,
      "waiting_for_match": false,
      "connected_esps": [
        1
      ]
    },
    "domain_limiter": {
      "active": false,
      "domains_at_limit": 0
    },
    "leads_status": {
      "no_leads_ready": false,
      "account_unavailable_skips": 0,
      "delay_not_met_skips": 0
    }
  },
  "summary": {
    "status": "healthy",
    "status_message": "Campaign is sending normally",
    "issue_started_at": "2026-04-26T02:24:55.822Z",
    "last_healthy_send_at": "2026-04-26T02:24:55.822Z",
    "ai_summary": "Your campaign is sending emails normally."
  }
}