GET
/
backends
cURL
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",
    "kw": 5.12345
  }
]
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.

Response

200 - application/json

Successfully retrieved backend.

The list of backends.

​
backend
enum<string>
required

Specifies target hardware and generation where applies.

Available options:
qpu.aria-1,
qpu.aria-2,
qpu.forte-1,
qpu.forte-enterprise-1
Example:

"qpu.aria-1"

​
status
enum<string>
required

Current availability.

Available options:
available,
unavailable
​
degraded
boolean
required

Flag to tell if the backend is degraded or not.

​
qubits
integer
required

The number of qubits available.

Required range: x >= 0
Example:

25

​
average_queue_time
number
required

Current wait time on the queue for execution.

Example:

1181215

​
last_updated
string
required

Last date time the backend status was updated.

Example:

"2025-06-16T00:00:00Z"

​
characterization_id
string

Current characterization ID for this backend

Example:

"617a1f8b-59d4-435d-aa33-695433d7155e"

​
kw
number

The average amount of energy consumed by the backend represented in kilowatts.

Example:

5.12345