TypeScript SDK

Configurations

OTEL Collector

Refer to the OTEL configuration page for instructions on running and configuring the OpenTelemetry Collector with a custom configuration file.

Ensure that you configure the Langtrace API token in the OTEL collector configuration file before proceeding.

TypeScript SDK

To send traces from your TypeScript project to Langtrace, use the following code snippet. Update the API key and endpoint as necessary.

Install the OpenTelemetry HTTP/JSON exporter package:

npm install @opentelemetry/exporter-trace-otlp-http

Implementation

Initialize the Langtrace SDK with a custom remote exporter that uses the OTLPTraceExporter to send traces to Langtrace Cloud or your self-hosted Langtrace instance.

Example pre-requisite steps for running the code.

Create a folder and setup a project

mkdir langtrace-otel
cd langtrace-otel
touch langtrace_otel.js
npm init -y

Edit the package.json file and add "type": "module" to enable running JS files directly:

{
  ...
  "type": "module",
  ...
}

Install the required packages:

  npm i openai @langtrase/typescript-sdk @opentelemetry/exporter-trace-otlp-http

Export the OpenAI key:

export OPENAI_API_KEY="your-openai-api-key"

langtrace_otel.js

import * as Langtrace from "@langtrase/typescript-sdk";
import { OTLPTraceExporter } from "@opentelemetry/exporter-trace-otlp-http";
import OpenAI from "openai";

Langtrace.init({
	batch: false,
	custom_remote_exporter: new OTLPTraceExporter({
		url: "http://localhost:4318/v1/traces",
	}),
	instrumentations: {
		openai: OpenAI,
	},
});

const openai = new OpenAI();

export async function example() {
	const completion = await openai.chat.completions.create({
		model: "gpt-4o-mini",
		messages: [
			{
				role: "system",
				content: "How many states of matter are there?",
			},
		],
	});
	console.log(completion.choices[0]);
}

await example();

Run the script:

node langtrace_otel.js

Ignore the following warning message from the Langtrace SDK:

No API key provided. Please provide an API key to start sending traces to Langtrace.

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Overview

Configurations

OTEL Collector

TypeScript SDK

Implementation

Conclusion

​Overview

​Configurations

​OTEL Collector

​TypeScript SDK

​Implementation

​Conclusion

Overview

Configurations

OTEL Collector

TypeScript SDK

Implementation

Conclusion