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

# Data Fusion

> Combine multiple data sources into a single governed endpoint.

<Note>
  Data Fusion is **coming soon**. We'd love to hear about your use case — [get in touch](mailto:hello@dataharbor.co?subject=Interest%20in%20Data%20Fusion).
</Note>

# Data Fusion

**Combine, don't duplicate.**

Join APIs with data lakes into unified, governed Virtual APIs. No new infrastructure required.

## Fuse

Reference another Virtual API and combine data into a unified meta response. Each source maintains its own governance rules while contributing to a composite view — no data duplication, no pipeline orchestration.

```yaml theme={null}
objects:
  enriched_customers:
    fuse:
      - source: crm-api           # Virtual API name
        object: customers
      - source: analytics-lake    # Virtual API name
        object: customer_metrics
    joinOn: customer_id
```

## Use cases

| Scenario              | Sources                                         |
| --------------------- | ----------------------------------------------- |
| Customer 360 view     | CRM API + analytics data lake + support tickets |
| Enriched transactions | Payment API + fraud signals + merchant data     |
| Unified inventory     | ERP system + warehouse API + supplier feeds     |

## Next steps

<CardGroup cols={2}>
  <Card title="Data Control" icon="shield" href="./data-control">
    Field-level privacy controls
  </Card>

  <Card title="Data Transform" icon="shuffle" href="./data-transform">
    Combine and transform fields
  </Card>
</CardGroup>