Your Application
      │
      ▼
┌─────────────────────────────────────────────────────────────┐
│                    QCOS API Gateway                         │
│   (api.softquantus.com — Azure Container App, West Europe)  │
│                                                             │
│  ┌──────────┐  ┌───────────┐  ┌──────────┐  ┌──────────┐  │
│  │ Auth &   │  │ Credit &  │  │ Policy & │  │ Audit &  │  │
│  │ Tenancy  │  │ Billing   │  │ Routing  │  │ Evidence │  │
│  └──────────┘  └───────────┘  └──────────┘  └──────────┘  │
└──────────────────────────┬──────────────────────────────────┘
                           │
          ┌────────────────┼────────────────────┐
          │                │                    │
          ▼                ▼                    ▼
  ┌───────────────┐ ┌─────────────┐  ┌──────────────────┐
  │  Cloud QPU    │ │  CPU Worker │  │   LUMI HPC       │
  │  Providers    │ │  (Azure CA) │  │  (SSH + SLURM)   │
  │               │ └─────────────┘  └──────────────────┘
  │ • AWS Braket  │
  │ • Azure Quantum│
  │ • IBM Quantum │
  │ • IonQ        │
  └───────────────┘

1. Authentication    → API key validated, tenant resolved
2. Credit check      → Pre-flight cost estimate, budget guard
3. Policy routing    → Autopilot selects optimal backend (or uses yours)
4. Execution         → Job submitted to provider, job_id returned
5. Result collection → Poll /api/v1/runtime/jobs/{job_id} or receive webhook
6. Evidence capture  → Hash, seal (Merkle SHA-256), store audit bundle
7. Billing commit    → Credits deducted, ledger entry created

QUEUED → RUNNING → COMPLETED
                 ↘ FAILED
                 ↘ CANCELLED

{
  "backend_id": "aws_braket_sv1",
  "qasm": "...",
  "shots": 1024
}

{
  "backend_id": "auto_sim",
  "qasm": "...",
  "shots": 1024
}