> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.nvidia.com/nemo/relay/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.nvidia.com/nemo/relay/_mcp/server.

# Struct LlmCall Params

> Builder parameters for `llm_call`.

Generated from `cargo doc --no-deps -p nemo-relay -p nemo-relay-adaptive -p nemo-relay-pii-redaction -p nemo-relay-ffi -p nemo-relay-types -p nemo-relay-plugin -p nemo-relay-worker-proto -p nemo-relay-worker`.

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Builder parameters for [`llm_call`](/reference/api/rust-library-reference/nemo-relay/api/llm/fn-llm-call).

## Fields

### `name: &'a str`

Logical provider or model family name recorded on the span.

### `request: &'a LlmRequest`

Raw request associated with the span.

### `parent: Option<&'a ScopeHandle>`

Optional explicit parent scope.

### `attributes: LlmAttributes`

LLM attribute bitflags applied to the span.

### `data: Option<Json>`

Optional application payload stored on the handle but not emitted as Agent Trajectory Observability Format (ATOF) data.

### `metadata: Option<Json>`

Optional JSON metadata recorded on the start event.

### `model_name: Option<String>`

Optional normalized model name recorded separately from the request payload.

### `annotated_request: Option<Arc<AnnotatedLlmRequest>>`

Optional normalized request annotation produced by a codec.

### `timestamp: Option<DateTime<Utc>>`

Optional timestamp captured as the handle start time and reused by the emitted start event. When omitted, the current UTC time is used.

## Implementations

### `impl<'a> LlmCallParams<'a>`

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#### `builder`

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Create a builder for building `LlmCallParams`. On the builder, call `.name(...)`, `.request(...)`, `.parent(...)`(optional), `.attributes(...)`(optional), `.data(...)`(optional), `.metadata(...)`(optional), `.model_name(...)`(optional), `.annotated_request(...)`(optional), `.timestamp(...)`(optional) to set the values of the fields. Finally, call `.build()` to create the instance of `LlmCallParams`.