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vparlapalli490

ServiceNow MCP Server

list_change_requests

Retrieve and filter change requests from ServiceNow to monitor, track, and manage IT infrastructure modifications.

Instructions

List change requests from ServiceNow

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
limitNoMaximum number of records to return
offsetNoOffset to start from
stateNoFilter by state
typeNoFilter by type (normal, standard, emergency)
categoryNoFilter by category
assignment_groupNoFilter by assignment group
timeframeNoFilter by timeframe (upcoming, in-progress, completed)
queryNoAdditional query string

Implementation Reference

  • The main handler function that implements the list_change_requests tool logic. It validates parameters using ListChangeRequestsParams, builds a ServiceNow Table API query based on filters, fetches change requests via GET /api/now/table/change_request, and returns the list with success status.
    def list_change_requests( auth_manager: AuthManager, server_config: ServerConfig, params: Dict[str, Any], ) -> Dict[str, Any]: """ List change requests from ServiceNow. Args: auth_manager: The authentication manager. server_config: The server configuration. params: The parameters for listing change requests. Returns: A list of change requests. """ # Unwrap and validate parameters result = _unwrap_and_validate_params( params, ListChangeRequestsParams ) if not result["success"]: return result validated_params = result["params"] # Build the query query_parts = [] if validated_params.state: query_parts.append(f"state={validated_params.state}") if validated_params.type: query_parts.append(f"type={validated_params.type}") if validated_params.category: query_parts.append(f"category={validated_params.category}") if validated_params.assignment_group: query_parts.append(f"assignment_group={validated_params.assignment_group}") # Handle timeframe filtering if validated_params.timeframe: now = datetime.now().strftime("%Y-%m-%d %H:%M:%S") if validated_params.timeframe == "upcoming": query_parts.append(f"start_date>{now}") elif validated_params.timeframe == "in-progress": query_parts.append(f"start_date<{now}^end_date>{now}") elif validated_params.timeframe == "completed": query_parts.append(f"end_date<{now}") # Add any additional query string if validated_params.query: query_parts.append(validated_params.query) # Combine query parts query = "^".join(query_parts) if query_parts else "" # Get the instance URL instance_url = _get_instance_url(auth_manager, server_config) if not instance_url: return { "success": False, "message": "Cannot find instance_url in either server_config or auth_manager", } # Get the headers headers = _get_headers(auth_manager, server_config) if not headers: return { "success": False, "message": "Cannot find get_headers method in either auth_manager or server_config", } # Make the API request url = f"{instance_url}/api/now/table/change_request" params = { "sysparm_limit": validated_params.limit, "sysparm_offset": validated_params.offset, "sysparm_query": query, "sysparm_display_value": "true", } try: response = requests.get(url, headers=headers, params=params) response.raise_for_status() result = response.json() # Handle the case where result["result"] is a list change_requests = result.get("result", []) count = len(change_requests) return { "success": True, "change_requests": change_requests, "count": count, "total": count, # Use count as total if total is not provided } except requests.exceptions.RequestException as e: logger.error(f"Error listing change requests: {e}") return { "success": False, "message": f"Error listing change requests: {str(e)}", }
  • Pydantic model defining the input parameters for the list_change_requests tool, including pagination (limit, offset), filters (state, type, category, etc.), and custom query.
    class ListChangeRequestsParams(BaseModel): """Parameters for listing change requests.""" limit: Optional[int] = Field(10, description="Maximum number of records to return") offset: Optional[int] = Field(0, description="Offset to start from") state: Optional[str] = Field(None, description="Filter by state") type: Optional[str] = Field(None, description="Filter by type (normal, standard, emergency)") category: Optional[str] = Field(None, description="Filter by category") assignment_group: Optional[str] = Field(None, description="Filter by assignment group") timeframe: Optional[str] = Field(None, description="Filter by timeframe (upcoming, in-progress, completed)") query: Optional[str] = Field(None, description="Additional query string")
  • MCP tool registration in get_tool_definitions(). Maps 'list_change_requests' to the aliased handler (list_change_requests_tool), input schema (ListChangeRequestsParams), description, and serialization ('json').
    "list_change_requests": ( list_change_requests_tool, ListChangeRequestsParams, str, # Expects JSON string "List change requests from ServiceNow", "json", # Tool returns list/dict ),
  • Import of list_change_requests function from change_tools.py into the tools module namespace.
    list_change_requests,
  • Import alias for the handler function used in MCP tool registration (list_change_requests_tool).
    list_change_requests as list_change_requests_tool,

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