# Data retrieval APIs for Amazon Elastic Block Store
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Amazon Elastic Block Store provides the following APIs for data retrieval.


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| Actions | Description | Access level | 
| --- | --- | --- | 
| <a name="ebs-GetSnapshotBlock"></a>[https://docs.aws.amazon.com/ebs/latest/APIReference/API_GetSnapshotBlock.html](https://docs.aws.amazon.com/ebs/latest/APIReference/API_GetSnapshotBlock.html) | Return the data of a block in an Amazon Elastic Block Store (EBS) snapshot | Read | 
| <a name="ebs-ListChangedBlocks"></a>[https://docs.aws.amazon.com/ebs/latest/APIReference/API_ListChangedBlocks.html](https://docs.aws.amazon.com/ebs/latest/APIReference/API_ListChangedBlocks.html) | List the blocks that are different between two Amazon Elastic Block Store (EBS) snapshots of the same volume/snapshot lineage | Read | 
| <a name="ebs-ListSnapshotBlocks"></a>[https://docs.aws.amazon.com/ebs/latest/APIReference/API_ListSnapshotBlocks.html](https://docs.aws.amazon.com/ebs/latest/APIReference/API_ListSnapshotBlocks.html) | List the blocks in an Amazon Elastic Block Store (EBS) snapshot | Read |