GET
/
backends
curl "https://api.ionq.co/v0.4/backends"
[
  {
    "backend": "qpu.aria-1",
    "status": "available",
    "degraded": true,
    "qubits": 25,
    "average_queue_time": 1181215,
    "last_updated": "2025-06-16T00:00:00Z",
    "characterization_id": "617a1f8b-59d4-435d-aa33-695433d7155e"
  }
]

List all available backends including both QPUs and simulators. This shows each backend’s current status (available, unavailable, degraded), number of qubits, average queue time, and links to performance characterizations.

Learn more about available backends.

Authorizations

​
Authorization
string
header
required

API keys are associated with a user and can be created on the IonQ Quantum Cloud application. To authenticate, prefix your API Key with apiKey and place it in the Authorization request header. Ex: Authorization: apiKey your-api-key

Response

200 - application/json

Successfully retrieved backend.

The list of backends.