mcp_server.py

"""
mcp_server.py – MCP tool server exposing:
  • query_database   – SQLite sample
  • query_salesforce – Salesforce via CData JDBC
Add more connectors under connectors/ and register the same way.
"""

from mcp.server.fastmcp import FastMCP
import sqlite3, json
from connectors.salesforce_connector import sf_query   # ← new connector

mcp = FastMCP("EnterpriseData")

# ─── in-memory SQLite sample ─────────────────────────────────────────────
conn = sqlite3.connect(":memory:", check_same_thread=False)
cur  = conn.cursor()

cur.execute("""
CREATE TABLE Customers (
    CustomerID      INTEGER PRIMARY KEY AUTOINCREMENT,
    Name            TEXT,
    Region          TEXT,
    LastOrderDate   TEXT
)
""")
cur.executemany(
    "INSERT INTO Customers (Name, Region, LastOrderDate) VALUES (?,?,?)",
    [
        ("Acme Corp",  "Northeast", "2024-12-01"),
        ("Beta Inc",   "West",      "2025-06-01"),
        ("Gamma Co",   "Northeast", "2023-09-15"),
        ("Delta LLC",  "South",     "2025-03-20"),
        ("Epsilon Ltd","Northeast", "2025-07-10"),
    ],
)
conn.commit()

# ─── SQLite tool ─────────────────────────────────────────────────────────
@mcp.tool()
def query_database(sql: str) -> str:
    """Run arbitrary SQL against the Customers SQLite table."""
    try:
        cur.execute(sql)
        cols = [d[0] for d in cur.description or []]
        rows = [dict(zip(cols, r)) for r in cur.fetchall()]
        return json.dumps(rows)
    except Exception as exc:
        return json.dumps({"error": str(exc)})

# ─── Salesforce tool (premium) ───────────────────────────────────────────
@mcp.tool()
def query_salesforce(sql: str) -> str:
    """Run SOQL-as-SQL against Salesforce objects (requires Pro plan)."""
    return sf_query(sql)

if __name__ == "__main__":
    mcp.run(transport="stdio")