# PingOnceRequest Request payload for a single ping probe `Goodmem.Client.Models.PingOnceRequest` - `Payload` (`string?`): Explicit UTF-8 payload to send with the probe (mutually exclusive with payloadSizeBytes) JSON: `payload`. - `PayloadSizeBytes` (`int?`): Synthetic payload size in bytes (mutually exclusive with payload) JSON: `payloadSizeBytes`. - `PayloadType` (`PingPayloadType?`): Desired payload type (defaults to provider-specific value) JSON: `payloadType`. - `TargetId` (`string`, required): Target resource ID (UUID) JSON: `targetId`. - `TargetTypeHint` (`PingTargetType?`): Optional hint for the target resource type JSON: `targetTypeHint`. - `TimeoutMs` (`int?`): Per-probe timeout in milliseconds (0 uses server default) JSON: `timeoutMs`. [.NET](../../dotnet.md) Related types — open only those used by your request: - [PingPayloadType](PingPayloadType.md) - [PingTargetType](PingTargetType.md)