---
title: OfflineTracerConfig
seo:
  title: OfflineTracerConfig — TypeScript SDK
  description: Configuration for `OfflineTracer.create()`. (TypeScript SDK)
description: Configuration for `OfflineTracer.create()`.
---

## Properties

| Prop | Type | Default | Description |
| - | - | - | - |
| `dataset?` | `Example[]` | - | List that receives an Example for each completed root span. |
| `exampleFields?` | `Record<string, unknown> \| undefined` | - | Fields included on every Example in dataset (e.g. { input: ..., goldenOutput: ... }). |
| `projectName?` | `string \| undefined` | - | Your Judgment project name. Required. |
| `apiKey?` | `string \| undefined` | - | Judgment API key. Defaults to JUDGMENT_API_KEY env var. |
| `organizationId?` | `string \| undefined` | - | Judgment organization ID. Defaults to JUDGMENT_ORG_ID env var. |
| `apiUrl?` | `string \| undefined` | - | Judgment API URL. Defaults to JUDGMENT_API_URL env var. |
| `environment?` | `string \| undefined` | - | Deployment environment name (e.g. "production"). |
| `setActive?` | `boolean \| undefined` | - | Whether to set this tracer as active. Defaults to true. |
| `serializer?` | `((value: unknown) => string) \| undefined` | - | Custom serialization function for span attribute values. |
| `resourceAttributes?` | `Record<string, string> \| undefined` | - | Additional OpenTelemetry resource attributes. |
| `sampler?` | `Sampler \| undefined` | - | Custom OpenTelemetry sampler. |
| `spanLimits?` | `SpanLimits \| undefined` | - | Custom OpenTelemetry span limits. |
| `spanProcessors?` | `SpanProcessor[] \| undefined` | - | Additional OpenTelemetry span processors. |