Marqov SDK

Orchestration engine for hybrid quantum-classical workflows.

Run a Bell state immediately — no credentials, no infrastructure:

import asyncio
from marqov.circuits import Circuit
from marqov.executors import LocalExecutor

async def main():
    result = await LocalExecutor().execute(
        Circuit().h(0).cnot(0, 1), shots=1000
    )
    print(result.counts)  # {'00': ~500, '11': ~500}

asyncio.run(main())

Scale to parallel workflows across any backend:

from marqov import task, workflow, bell_state
from marqov.executors import LocalExecutor

@task
async def measure(shots):
    result = await LocalExecutor().execute(bell_state(), shots=shots)
    return result.counts

@workflow
def multi_shot_study(shot_counts):
    return [measure(n) for n in shot_counts]  # all run in parallel

dispatch = multi_shot_study([100, 500, 1000, 5000])
# dispatch.run(client) — needs a Temporal worker

Independent tasks execute in parallel automatically. Marqov handles scheduling, retries, and result collection across any supported backend. Run your own Temporal worker (see marqov/workflows/). Hosted execution is provided separately by the Marqov Platform. SDK installation alone does not enable managed execution.

Installation

SDK 0.7.0 is published. See the changelog and 0.7.0 upgrade guide, especially if you use AWS Braket.

pip install marqov

With framework- or backend-specific extras:

# AWS Braket
pip install "marqov[braket]"

# IBM Quantum
pip install "marqov[ibm]"

# QuTiP solvers and Marqov's result-recording helper
pip install "marqov[qutip]"

# Combine selected frameworks
pip install "marqov[qutip,qiskit]"

# Broad framework bundle
pip install "marqov[all]"

AWS Braket is an optional provider dependency. Existing Braket installations should use marqov[braket] (or marqov[all]) when upgrading. Core workflows, LocalExecutor and Circuit.simulate() do not require it. MarqovDevice with local or marqov-sim uses Braket's local simulator and needs the extra, as do Braket circuit conversions. Hosted compiler/task environments can pin their serialization version without inheriting Braket's separate job serializer constraint.

See the QuTiP guide for a copy-and-run simulation, recorded observables, seed replay and saved-state handling. In a source checkout, run:

python examples/qutip_decay.py

The example prints JSON and runs locally without an account. Installing the wheel does not install the examples directory or enable managed execution.

For local development:

git clone https://github.com/marqov-dev/marqov-sdk
cd marqov-sdk
pip install -e ".[all,dev]"
pytest tests/ -v

Cloud Executors

Swap in a cloud backend when you're ready to run on hardware — on your own provider accounts, no Marqov account needed. The AWS example below requires pip install "marqov[braket]" and your AWS credentials:

import asyncio
from marqov.circuits import Circuit
from marqov.executors import ExecutorFactory

async def main():
    circuit = Circuit().h(0).cnot(0, 1)

    executor = ExecutorFactory.create_executor("sv1", {
        "provider": "AWS Braket",
        "device_arn": "arn:aws:braket:::device/quantum-simulator/amazon/sv1",
        "s3_bucket": "my-bucket",
        "s3_prefix": "jobs",
    })
    result = await executor.execute(circuit, shots=1000)
    print(result.counts)

asyncio.run(main())

Or run directly on IonQ hardware via the native REST API (no AWS account needed):

executor = ExecutorFactory.create_executor("qpu.aria-1", {
    "provider": "IonQ Direct",
    "api_key": "your-ionq-api-key",  # or set IONQ_API_KEY
})
result = await executor.execute(circuit, shots=1000)

Or run on Rigetti QPUs (or the local QVM, no cloud account needed) via Rigetti QCS:

executor = ExecutorFactory.create_executor("2q-qvm", {
    "provider": "Rigetti QCS",
})
result = await executor.execute(circuit, shots=1000)

Supported Backends

For QiliSim sampling seeds and repeatability limits, see QiliSDK seed support.

Circuit Interop

Circuit is a backend-agnostic abstraction that converts to any supported framework's native format:

from marqov.circuits import Circuit

circuit = Circuit().h(0).cnot(0, 1)

circuit.to_qiskit()   # qiskit.QuantumCircuit
circuit.to_braket()   # braket.circuits.Circuit (requires marqov[braket])
circuit.to_cirq()     # cirq.Circuit
circuit.to_pyquil()   # pyquil.Program  (requires pip install marqov[pyquil])

Import from other formats:

circuit = Circuit.from_qiskit(qiskit_circuit)
circuit = Circuit.from_cirq(cirq_circuit)
circuit = Circuit.from_pennylane(tape)
circuit = Circuit.from_pyquil(pyquil_program)  # requires pip install marqov[pyquil]

Using the hosted platform (marqov.platform)

The SDK runs fully standalone — everything above needs no Marqov account.

If you want managed backend credentials, persistent job history, execution traces, and spend controls without running your own infrastructure, the Marqov Platform is an opt-in value-add.

marqov.platform is an optional import — loading marqov never loads the platform client. It is only activated when you import it explicitly.

Live-server caveat: The examples below are not yet verified against a live server — live verification is pending our staging environment.

v1.0 scope: v1.0 supports free backends (e.g. dwave-sim). Paid backends and Circuit submission are coming in a future update.

Quickstart

1. Set your API key (get one from the Marqov Platform dashboard):

export MARQOV_PLATFORM_KEY="marqey_live_your_key_here"

2. Submit a script and poll for results:

from marqov.platform import MarqovClient

# Key is read from MARQOV_PLATFORM_KEY automatically
client = MarqovClient()

script = """
import asyncio
from marqov import task

@task
async def bell(shots):
    from marqov.circuits import Circuit
    from marqov.executors import LocalExecutor
    result = await LocalExecutor().execute(
        Circuit().h(0).cnot(0, 1), shots=shots
    )
    return result.counts

# An async @task called outside a @workflow isn't awaited automatically
# (see marqov/workflows/decorators.py for details) — drive it with
# asyncio.run() rather than calling bell(1000) bare.
asyncio.run(bell(1000))
"""

job = client.submit(script, backend="dwave-sim", framework="marqov", shots=1000)
print("Job ID:", job.id)

# Block until complete (up to 5 minutes by default)
result = job.result(timeout=300.0)
print(result.counts)       # e.g. {'00': 507, '11': 493}
print(result.probabilities) # e.g. {'00': 0.507, '11': 0.493}

3. Check available backends:

for b in client.backends():
    print(b.slug, b.name, "available:", b.is_available)

4. Reconnect to a job from a previous session:

job = client.job("550e8400-e29b-41d4-a716-446655440000")
result = job.result(timeout=60.0)

Error handling

All platform errors inherit from MarqovPlatformError:

from marqov.platform import AuthenticationError, JobFailed, RateLimited

try:
    job = client.submit(script, backend="dwave-sim", framework="marqov")
    result = job.result(timeout=120.0)
except AuthenticationError:
    print("Check your MARQOV_PLATFORM_KEY")
except JobFailed as e:
    print("Job failed:", e.message)
except RateLimited as e:
    print(f"Rate limited — retry after {e.retry_after}s")
except TimeoutError:
    print("Timed out — job is still running server-side")

For the full error taxonomy and retry guidance see docs/platform-client/error-handling.md.

Platform documentation

• Getting started
• Error handling
• API reference

Contributing

See CONTRIBUTING.md for the executor interface spec, canonical gate set, factory registration steps, and local QVM setup for Rigetti development.

The bounty issues that were open through unitaryHACK 2026 — have been claimed, but follow the issues page as we will be looking at ongoing and rolling issue bounties to support and encourage community participation.

Authors

This project was created by David Ryan (@ddri), with contributions from the community.

License

Apache 2.0