Optionalconfig: OTLPExporterNodeConfigBase & {OptionalapiKey?: stringThe API key to use for the exporter.
Optionalheaders?: Record<string, string>Default headers to add to exporter requests.
OptionalprojectName?: stringThe name of the project to export traces to.
OptionaltransformExportedSpan?: (span: ReadableSpan) => ReadableSpan | Promise<ReadableSpan>A function that takes an exported span and returns a transformed version of it. May be used to add or remove attributes from the span.
For example, to add a custom attribute to the span, you can do:
import { LangSmithOTLPTraceExporter } from "langsmith/experimental/otel/exporter";
const exporter = new LangSmithOTLPTraceExporter({
transformExportedSpan: (span) => {
if (span.name === "foo") {
span.attributes["langsmith.metadata.bar"] = "baz";
}
return span;
}
});
LangSmith OpenTelemetry trace exporter that extends the standard OTLP trace exporter with LangSmith-specific configuration and span attribute transformations.
This exporter automatically configures itself with LangSmith endpoints and API keys, based on your LANGSMITH_API_KEY and LANGSMITH_PROJECT environment variables. Will also respect OTEL_EXPORTER_OTLP_ENDPOINT or OTEL_EXPORTER_OTLP_HEADERS environment variables if set.
Param: config
Optional configuration object that accepts all OTLPTraceExporter parameters. If not provided, uses default LangSmith configuration: -
url: Defaults to LangSmith OTEL endpoint (${LANGSMITH_ENDPOINT}/otel/v1/traces) -headers: Auto-configured with LangSmith API key and project headers Any provided config will override these defaults.