---
title: Sample-based quantum diagonalization (SQD) API documentation (latest version)
description: Index of all the modules in the latest version of qiskit-addon-sqd.
source: https://eu-de.quantum.cloud.ibm.com/docs/en/api/qiskit-addon-sqd
---

# `qiskit-addon-sqd` API reference

- [Configuration recovery (`qiskit_addon_sqd.configuration_recovery`)](/docs/api/qiskit-addon-sqd/configuration-recovery)
- [Counts (`qiskit_addon_sqd.counts`)](/docs/api/qiskit-addon-sqd/counts)
- [Fermion (`qiskit_addon_sqd.fermion`)](/docs/api/qiskit-addon-sqd/fermion)
- [Qubit (`qiskit_addon_sqd.qubit`)](/docs/api/qiskit-addon-sqd/qubit)
- [Subsampling (`qiskit_addon_sqd.subsampling`)](/docs/api/qiskit-addon-sqd/subsampling)


## Contents

- [API index](/docs/api/qiskit-addon-sqd)
- [Release notes](/docs/api/qiskit-addon-sqd/release-notes)
- [qiskit_addon_sqd.configuration_recovery](/docs/api/qiskit-addon-sqd/configuration-recovery)
- [qiskit_addon_sqd.counts](/docs/api/qiskit-addon-sqd/counts)
- [qiskit_addon_sqd.fermion](/docs/api/qiskit-addon-sqd/fermion)
- [qiskit_addon_sqd.qubit](/docs/api/qiskit-addon-sqd/qubit)
- [qiskit_addon_sqd.subsampling](/docs/api/qiskit-addon-sqd/subsampling)