Check resultType, inputRequests and requestState used when an MCP operation needs additional client input.
MCP 2026-07-28 allows an operation to return input_required when it needs more information. The client answers the embedded requests and retries the original operation.
Validate MCP 2026-07-28 input_required Multi Round-Trip Request results.
Use MCP Input Required Validator as a focused pre-flight utility while building, reviewing or debugging an MCP integration. Paste the relevant configuration, protocol message, metadata, schema or value into the tool and review the returned findings before the same data reaches a production client or server.
Protocol checks are especially useful when debugging interoperability between different MCP clients, servers, gateways and SDK versions. The tool analyzes the data you provide and does not initiate a live MCP exchange.
A clean result means the input passed the rules implemented by this utility. It does not guarantee application security, protocol interoperability or correct business behavior. Test important integrations against the exact MCP client, SDK, gateway and server versions used in your deployment.