feat(api): add centralized API version config for MCP server

- Create mcp-server/config.py as single source of truth
- API_VERSION = 'v1', API_PREFIX = '/api/v1'
- server.py: import API_PREFIX, construct BACKEND_API_URL with version
- Remove hardcoded /api/ from all 6 API calls:
  - /search
  - /repos
  - /repos/{id}/dependencies
  - /repos/{id}/style-analysis
  - /repos/{id}/impact
  - /repos/{id}/insights

Mirrors backend/config/api.py and frontend/config/api.ts pattern.

Part of #55

Author: DevanshuNEU

mcp-server/config.py

@@ -0,0 +1,19 @@
+"""
+API Configuration - Single Source of Truth for API Versioning
+
+Change API_VERSION here to update all API calls across the MCP server.
+Example: "v1" -> "v2" will change /api/v1/* to /api/v2/*
+"""
+
+# =============================================================================
+# API VERSION CONFIGURATION
+# =============================================================================
+
+API_VERSION = "v1"
+
+# =============================================================================
+# DERIVED PREFIXES (auto-calculated from version)
+# =============================================================================
+
+# Current versioned API prefix: /api/v1
+API_PREFIX = f"/api/{API_VERSION}"

mcp-server/server.py

@@ -14,11 +14,15 @@
 import mcp.types as types
 from dotenv import load_dotenv
 
+# Import API config (single source of truth for versioning)
+from config import API_PREFIX
+
 # Load environment variables
 load_dotenv()
 
 # Configuration
-BACKEND_API_URL = os.getenv("BACKEND_API_URL", "http://localhost:8000")
+BACKEND_BASE_URL = os.getenv("BACKEND_API_URL", "http://localhost:8000")
+BACKEND_API_URL = f"{BACKEND_BASE_URL}{API_PREFIX}"  # Full versioned URL
 API_KEY = os.getenv("API_KEY", "dev-secret-key")
 
 # Create MCP server instance
@@ -138,7 +142,7 @@ async def handle_call_tool(
 
             if name == "search_code":
                 response = await client.post(
-                    f"{BACKEND_API_URL}/api/search",
+                    f"{BACKEND_API_URL}/search",
                     json=arguments,
                     headers=headers
                 )
@@ -167,7 +171,7 @@ async def handle_call_tool(
 
             elif name == "list_repositories":
                 response = await client.get(
-                    f"{BACKEND_API_URL}/api/repos",
+                    f"{BACKEND_API_URL}/repos",
                     headers=headers
                 )
                 response.raise_for_status()
@@ -188,7 +192,7 @@ async def handle_call_tool(
 
             elif name == "get_dependency_graph":
                 response = await client.get(
-                    f"{BACKEND_API_URL}/api/repos/{arguments['repo_id']}/dependencies",
+                    f"{BACKEND_API_URL}/repos/{arguments['repo_id']}/dependencies",
                     headers=headers
                 )
                 response.raise_for_status()
@@ -214,7 +218,7 @@ async def handle_call_tool(
 
             elif name == "analyze_code_style":
                 response = await client.get(
-                    f"{BACKEND_API_URL}/api/repos/{arguments['repo_id']}/style",
+                    f"{BACKEND_API_URL}/repos/{arguments['repo_id']}/style-analysis",
                     headers=headers
                 )
                 response.raise_for_status()
@@ -245,7 +249,7 @@ async def handle_call_tool(
 
             elif name == "analyze_impact":
                 response = await client.post(
-                    f"{BACKEND_API_URL}/api/repos/{arguments['repo_id']}/impact",
+                    f"{BACKEND_API_URL}/repos/{arguments['repo_id']}/impact",
                     json={"repo_id": arguments['repo_id'], "file_path": arguments['file_path']},
                     headers=headers
                 )
@@ -276,7 +280,7 @@ async def handle_call_tool(
 
             elif name == "get_repository_insights":
                 response = await client.get(
-                    f"{BACKEND_API_URL}/api/repos/{arguments['repo_id']}/insights",
+                    f"{BACKEND_API_URL}/repos/{arguments['repo_id']}/insights",
                     headers=headers
                 )
                 response.raise_for_status()