feat: add initial implementation of Finance MCP server with REST API and setup instructions (ref #16)

mcp/mcp_server.py

@@ -0,0 +1,37 @@
+from fastapi import FastAPI, HTTPException
+from pydantic import BaseModel
+from datetime import datetime
+from typing import List, Optional
+
+app = FastAPI(title="Finance MCP Server")
+
+class Transaction(BaseModel):
+    id: Optional[int]
+    amount: float
+    description: str
+    timestamp: datetime = datetime.now()
+    category: str
+
+# In-memory storage (replace with database in production)
+transactions: List[Transaction] = []
+
+@app.get("/")
+async def root():
+    return {"status": "running", "service": "Finance MCP Server"}
+
+@app.get("/transactions")
+async def get_transactions():
+    return transactions
+
+@app.post("/transactions")
+async def create_transaction(transaction: Transaction):
+    transaction.id = len(transactions) + 1
+    transactions.append(transaction)
+    return transaction
+
+@app.get("/transactions/{transaction_id}")
+async def get_transaction(transaction_id: int):
+    for tx in transactions:
+        if tx.id == transaction_id:
+            return tx
+    raise HTTPException(status_code=404, detail="Transaction not found")