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

# client.hub

> Hub API Reference

The `client.hub` object provides access to domains and schemas for structured data extraction.

## List Domains

```python theme={"theme":{"light":"github-light","dark":"dark-plus"}}
from vlmrun.client import VLMRun
from vlmrun.client.types import HubDomainInfo, HubSchemaResponse

client = VLMRun()

# List all available domains
domains: List[HubDomainInfo] = client.hub.list_domains()

# Print domain information
for domain in domains:
    print(f"Domain: {domain.domain}")
```

## Get Schema

```python theme={"theme":{"light":"github-light","dark":"dark-plus"}}
# Get schema for a specific domain
schema: HubSchemaResponse = client.hub.get_schema("document.invoice")
print(f"version={schema.version}, hash={schema.hash}, json_schema={schema.json_schema}")
```