IntegrationsAgent Frameworks

Langflow

Trace Langflow visual AI workflows with Respan.
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Add the Docs MCP to your AI coding tool to get help building with Respan. No API key needed.

1{
2  "mcpServers": {
3    "respan-docs": {
4      "url": "https://docs.respan.ai/mcp"
5    }
6  }
7}

What is Langflow?

Langflow is a visual framework by DataStax for building multi-agent and RAG applications. It provides a drag-and-drop interface for composing LLM pipelines with components for models, prompts, tools, and data sources.

Setup

1

Install packages

Langflow is built on LangChain, so tracing uses the LangChain instrumentation.

$pip install respan-ai opentelemetry-instrumentation-langchain langflow
2

Set environment variables

$export RESPAN_API_KEY="YOUR_RESPAN_API_KEY"
$export OPENAI_API_KEY="YOUR_OPENAI_API_KEY"
3

Initialize and run

1import os
2from dotenv import load_dotenv
3
4load_dotenv()
5
6from respan import Respan
7from respan_instrumentation_openinference import OpenInferenceInstrumentor
8from opentelemetry.instrumentation.langchain import LangchainInstrumentor
9
10# Initialize Respan with LangChain instrumentation for Langflow
11respan = Respan(
12    instrumentations=[
13        OpenInferenceInstrumentor(instrumentor=LangchainInstrumentor())
14    ]
15)
16
17# Run Langflow with tracing enabled
18# Option 1: Use the Langflow CLI with tracing active
19# langflow run
20
21# Option 2: Use the Langflow API programmatically
22from langflow.load import run_flow_from_json
23
24result = run_flow_from_json(
25    flow="path/to/your/flow.json",
26    input_value="What is the meaning of life?",
27)
28print(result)
29
30respan.flush()
4

View your trace

Open the Traces page to see your Langflow workflow with component-level operations, LLM calls, and pipeline execution.

What gets traced

All Langflow operations are auto-instrumented via the LangChain layer:

  • Visual workflow execution
  • Component-level operations
  • LLM calls with model, tokens, and input/output
  • Vector store queries
  • Tool and API calls

Traces appear in the Traces dashboard.

Learn more