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Overview

LangGraph enables you to build complex, stateful agents that can use Observee’s MCP tools. This integration combines LangGraph’s powerful graph-based agent architecture with Observee’s tool ecosystem.

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Prerequisites

Before getting started, ensure you have:
  • Python 3.10 or later installed
  • Required packages installed: 
    pip install langchain-mcp-adapters langgraph langchain langchain-openai
  • Your Observee client ID for identifying your customer
  • Your Observee API key for authentication
  • OpenAI API key or other LLM provider credentials

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Example: Building a Stateful Agent with Observee Tools

This example demonstrates how to create a LangGraph agent that maintains state across interactions while using Observee tools: 
from langchain_mcp_adapters.client import MultiServerMCPClient
from langgraph.graph import StateGraph, MessagesState, START
from langgraph.prebuilt import ToolNode, tools_condition
from langchain.chat_models import init_chat_model

# Initialize the chat model
model = init_chat_model("openai:gpt-4")

# Configure the MCP client to connect to Observee
# Replace {your_client_id} with your actual client ID from the Observee dashboard
client = MultiServerMCPClient(
    {
        "observee": {
            "url": "https://mcp.observee.ai/mcp?client_id={your_client_id}",
            "transport": "streamable_http",
            "headers": {
                "Authorization": "Bearer {observee_api_key}"  # Replace with your API key
            },
        }
    }
)

# Get all available tools from Observee
tools = await client.get_tools()

# Define the model calling function
def call_model(state: MessagesState):
    response = model.bind_tools(tools).invoke(state["messages"])
    return {"messages": response}

# Build the state graph
builder = StateGraph(MessagesState)
builder.add_node("call_model", call_model)
builder.add_node("tools", ToolNode(tools))
builder.add_edge(START, "call_model")
builder.add_conditional_edges(
    "call_model",
    tools_condition,
)
builder.add_edge("tools", "call_model")

# Compile the graph
graph = builder.compile()

# Use the agent - it maintains state across interactions
response1 = await graph.ainvoke({
    "messages": "Check my latest system metrics"
})

# Follow-up question uses the context from the previous interaction
response2 = await graph.ainvoke({
    "messages": "Based on those metrics, are there any issues I should address?"
})

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