> ISPO SDK documentation. [HTML](https://ispo.ai/docs/interfaces/core.Supporting_types.JsonResultEnvelope.html) · [Documentation index](https://ispo.ai/docs/llms.txt)

# Interface JsonResultEnvelope

Worker → host → caller `json` envelope (§25). Read-only/ephemeral structured output: the caller receives validated data and NO durable write is implied.

```typescript
interface JsonResultEnvelope {
    data: unknown;
    kind: "json";
}
```

Types: [data](#data), [kind](#kind)

##### Index

### <a id="properties"></a>Properties

[data](#data) [kind](#kind)

## <a id="properties-1"></a>Properties

### <a id="data"></a>data

```typescript
data: unknown
```

### <a id="kind"></a>kind

```typescript
kind: "json"
```