Add /health endpoint and /mcp/openapi.json for discovery

server.py

@@ -1960,6 +1960,89 @@ async def global_exception_handler(request, exc):
     )
 
 
+@app.get("/health")
+async def health_check():
+    return {
+        "status": "ok",
+        "service": "mcp-email-server",
+        "version": "1.0.0"
+    }
+
+
+@app.get("/mcp/openapi.json")
+async def mcp_openapi_spec():
+    # Minimal OpenAPI 3.1 document for compatibility with clients
+    # that expect an OpenAPI spec at /mcp/openapi.json.
+    # Actual tool definitions are provided via MCP tools/list.
+    return {
+        "openapi": "3.1.0",
+        "info": {
+            "title": "MCP Email Server",
+            "version": "1.0.0",
+            "description": "Email assistant MCP server. Tools are exposed via MCP Streamable HTTP at POST /mcp."
+        },
+        "paths": {
+            "/mcp": {
+                "post": {
+                    "summary": "MCP JSON-RPC endpoint",
+                    "description": "Primary MCP endpoint (Streamable HTTP). Use JSON-RPC 2.0 with methods: initialize, tools/list, tools/call.",
+                    "requestBody": {
+                        "required": True,
+                        "content": {
+                            "application/json": {
+                                "schema": {
+                                    "type": "object",
+                                    "description": "JSON-RPC 2.0 request or batch of requests"
+                                }
+                            }
+                        }
+                    },
+                    "responses": {
+                        "200": {
+                            "description": "JSON-RPC 2.0 response",
+                            "content": {
+                                "application/json": {
+                                    "schema": {
+                                        "type": "object"
+                                    }
+                                }
+                            }
+                        },
+                        "400": {
+                            "description": "Invalid JSON or JSON-RPC request"
+                        },
+                        "500": {
+                            "description": "Internal server error"
+                        }
+                    }
+                }
+            },
+            "/health": {
+                "get": {
+                    "summary": "Health check",
+                    "responses": {
+                        "200": {
+                            "description": "Service is running",
+                            "content": {
+                                "application/json": {
+                                    "schema": {
+                                        "type": "object",
+                                        "properties": {
+                                            "status": {"type": "string"},
+                                            "service": {"type": "string"},
+                                            "version": {"type": "string"}
+                                        }
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+
 @app.post("/mcp")
 async def mcp_endpoint(request: Request):
     if request.method != "POST":