> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sqd.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Finalized and recent data

> Choose between Portal streams with recent or finalized blocks.

Portal treats finalized and recent blocks differently:

* A **finalized block** has met the finality rule used by the dataset.
* A **recent block** may not have met that rule. A chain reorganization can
  replace it and any later blocks built on it.

Portal provides two stream operations:

| Operation                                   | Data returned                                                    | Reorg handling                                           |
| ------------------------------------------- | ---------------------------------------------------------------- | -------------------------------------------------------- |
| `POST /datasets/{dataset}/stream`           | Finalized history and, when available, recent unfinalized blocks | Send `parentBlockHash` when resuming and handle HTTP 409 |
| `POST /datasets/{dataset}/finalized-stream` | Finalized blocks only                                            | The stream does not include unfinalized blocks           |

Use `/stream` when the client needs blocks close to the chain head. Because
those blocks can change, clients that continue a standard stream must account
for chain reorganizations.

Use `/finalized-stream` when the client does not need the latest unfinalized
blocks. It returns less recent data because finalization happens after a block
is first produced.

The head operations report the latest block visible through each view:

```http theme={"system"}
GET /datasets/{dataset}/head
GET /datasets/{dataset}/finalized-head
```

For the meaning of a reorganization and links to the chain-specific recovery
procedures, continue with [Blockchain
forks](/en/portal/introduction/blockchain-forks). The complete endpoint details
are in the [EVM API guide](/en/portal/evm/api#core-endpoints) and [Solana API
guide](/en/portal/solana/api#core-endpoints).


## Related topics

- [Finalized Dataset Head](/en/api/bitcoin/finalized-head.md)
- [Fork handling](/en/sdk/pipes-sdk/evm/guides/architecture-deep-dives/fork-handling.md)
- [How Portal serves data](/en/portal/introduction/how-portal-serves-data.md)
- [Portal API introduction](/en/portal/introduction/portal-api.md)
- [Private Portal setup](/en/portal/self-hosting.md)