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# source: VoltAgent__voltagent/website/recipes/langfuse.md type: docs
---
id: langfuse
title: Langfuse
slug: langfuse
description: Export traces to Langfuse for observability.
---
# Langfuse
Export agent traces to Langfuse for monitoring, debugging, and analytics.
## Installation
```bash
npm install @voltagent/langfuse-exporter
```
## Quick Setup
```typescript
import { openai } from "@ai-sdk/openai";
import { Agent, VoltAgent, VoltAgentObservability } from "@voltagent/core";
import { createLangfuseSpanProcessor } from "@voltagent/langfuse-exporter";
import { honoServer } from "@voltagent/server-hono";
const agent = new Agent({
name: "Traced Agent",
instructions: "A helpful assistant",
model: openai("gpt-4o-mini"),
});
// Configure Langfuse observability
const observability = new VoltAgentObservability({
spanProcessors: [
createLangfuseSpanProcessor({
publicKey: process.env.LANGFUSE_PUBLIC_KEY,
secretKey: process.env.LANGFUSE_SECRET_KEY,
baseUrl: process.env.LANGFUSE_BASE_URL, // Optional for self-hosted
debug: true,
}),
],
});
new VoltAgent({
agents: { agent },
server: honoServer({ port: 3141 }),
observability,
});
```
## Environment Variables
```env
LANGFUSE_PUBLIC_KEY=pk-lf-...
LANGFUSE_SECRET_KEY=sk-lf-...
LANGFUSE_BASE_URL=https://cloud.langfuse.com # Or your self-hosted URL
```
## What Gets Traced
- Agent invocations
- Tool calls and results
- LLM requests and responses
- Token usage
- Latency metrics
- Errors and exceptions
## Multiple Exporters
```typescript
import { createLangfuseSpanProcessor } from "@voltagent/langfuse-exporter";
import { LibSQLObservabilityAdapter } from "@voltagent/libsql";
const observability = new VoltAgentObservability({
// Local storage for traces
storage: new LibSQLObservabilityAdapter(),
// Also export to Langfuse
spanProcessors: [
createLangfuseSpanProcessor({
publicKey: process.env.LANGFUSE_PUBLIC_KEY,
secretKey: process.env.LANGFUSE_SECRET_KEY,
}),
],
});
```
## Full Example
See the complete example: [with-langfuse on GitHub](https://github.com/VoltAgent/voltagent/tree/main/examples/with-langfuse)
<|endoftext|>
# source: VoltAgent__voltagent/website/recipes/slack-agent.md type: docs
---
id: slack-agent
title: Slack Agent
description: Listen to Slack channel messages, process them with AI, and reply via VoltOps.
hide_table_of_contents: true
---