9th Assignment of MCP client

mcp_client_assignment/.env.example

+
+SMTP_SERVER=smtp.example.com
+SMTP_USER=your-email@example.com
+SMTP_PASSWORD=yourpassword

mcp_client_assignment/README.md

+
+# MCP Client
+
+## Overview
+
+This project contains a simple MCP client and a mock MCP server that:
+- Fetches user email context
+- Queries calendar events via Outlook tool endpoint
+- Sends a summary email
+
+## Setup
+
+### Install dependencies
+```bash
+pip install -r requirements.txt
+```
+
+### Run the MCP server
+```bash
+uvicorn mcp-server:app --reload
+```
+
+### Run the client
+Update `.env` with your SMTP credentials, then:
+```bash
+python mcp-client.py
+```

mcp_client_assignment/mcp-client.py

+
+import httpx
+import smtplib
+import os
+from email.mime.text import MIMEText
+from datetime import datetime, timedelta
+from dotenv import load_dotenv
+
+load_dotenv()
+
+MCP_SERVER_URL = "http://localhost:8000"
+SMTP_SERVER = os.getenv("SMTP_SERVER")
+SMTP_PORT = 587
+SMTP_USER = os.getenv("SMTP_USER")
+SMTP_PASS = os.getenv("SMTP_PASSWORD")
+FROM_EMAIL = os.getenv("SMTP_USER")
+
+def get_user_context():
+    try:
+        response = httpx.post(f"{MCP_SERVER_URL}/context", json={})
+        response.raise_for_status()
+        context = response.json()
+        return context.get("email")
+    except Exception as e:
+        print(f"[ERROR] Failed to fetch user context: {e}")
+        return None
+
+def get_calendar_events(user_email: str):
+    today = datetime.utcnow()
+    start = today.replace(hour=0, minute=0, second=0, microsecond=0).isoformat() + "Z"
+    end = (today + timedelta(days=1)).replace(hour=0, minute=0, second=0, microsecond=0).isoformat() + "Z"
+
+    payload = {
+        "tool_name": "get_upcoming_events",
+        "tool_input": {
+            "email": user_email,
+            "start_datetime": start,
+            "end_datetime": end
+        }
+    }
+
+    try:
+        response = httpx.post(f"{MCP_SERVER_URL}/tool", json=payload)
+        response.raise_for_status()
+        return response.json().get("events", [])
+    except Exception as e:
+        print(f"[ERROR] Failed to fetch calendar events: {e}")
+        return []
+
+def send_email_summary(to_email, events):
+    if not events:
+        body = "You have no events scheduled for today."
+    else:
+        summary = "\n".join(
+            f"- {e['subject']} at {e['start']['dateTime']} (location: {e.get('location', {}).get('displayName', '-')})"
+            for e in events
+        )
+        body = f"Hello,\n\nHere is your schedule for today:\n\n{summary}\n\nRegards,\nMCP Client"
+
+    msg = MIMEText(body)
+    msg["Subject"] = "Today's Outlook Calendar Summary"
+    msg["From"] = FROM_EMAIL
+    msg["To"] = to_email
+
+    try:
+        with smtplib.SMTP(SMTP_SERVER, SMTP_PORT) as server:
+            server.starttls()
+            server.login(SMTP_USER, SMTP_PASS)
+            server.send_message(msg)
+        print(f"[INFO] Email sent to {to_email}")
+    except Exception as e:
+        print(f"[ERROR] Failed to send email: {e}")
+
+if __name__ == "__main__":
+    print("[INFO] Starting MCP Client...")
+    user_email = get_user_context()
+    if not user_email:
+        print("[ERROR] No user email found. Exiting.")
+        exit(1)
+    print(f"Found user: {user_email}")
+    events = get_calendar_events(user_email)
+    print(f"Fetched {len(events)} events.")
+    send_email_summary(user_email, events)

mcp_client_assignment/mcp-server.py

+
+from fastapi import FastAPI
+from pydantic import BaseModel
+from datetime import datetime, timedelta
+
+app = FastAPI()
+
+@app.post("/context")
+def get_context():
+    return {"email": "dummy.user@example.com"}
+
+class ToolInput(BaseModel):
+    email: str
+    start_datetime: str
+    end_datetime: str
+
+class ToolRequest(BaseModel):
+    tool_name: str
+    tool_input: ToolInput
+
+@app.post("/tool")
+def get_tool_data(req: ToolRequest):
+    now = datetime.utcnow()
+    events = [
+        {"subject": "Team Standup", "start": {"dateTime": (now + timedelta(hours=1)).isoformat()}, "location": {"displayName": "Zoom"}},
+        {"subject": "Client Call", "start": {"dateTime": (now + timedelta(hours=3)).isoformat()}, "location": {"displayName": "MS Teams"}}
+    ]
+    return {"events": events}

mcp_client_assignment/requirements.txt

+
+httpx
+python-dotenv
+fastapi
+uvicorn