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# Availability

> Mark features as available in specific SDK versions using `x-fern-availability` extension

Mark features as available in specific SDK versions:

**`openrpc.yml`**

```yaml title="openrpc.yml" {4-6}
methods:
  - name: beta.advancedSearch
    summary: Advanced search functionality
    x-fern-availability:
      status: beta
      message: "This feature is in beta and may change"
    params:
      - name: searchQuery
        schema:
          $ref: '#/components/schemas/AdvancedSearchQuery'
    result:
      name: searchResults
      schema:
        $ref: '#/components/schemas/SearchResults'
```

> Mark features as available in specific SDK versions using `x-fern-availability` extension