{"record":{"id":"0d31321dcc5625ee","repo":"rohitg00/ai-engineering-from-scratch","slug":"32600-0d3132","errorCode":"-32600","errorMessage":"Invalid Request","messagePattern":"Invalid Request","errorType":"validation","errorClass":"RpcFault","httpStatus":null,"severity":"error","filePath":"phases/13-tools-and-protocols/09-mcp-transports/code/main.py","lineNumber":171,"sourceCode":"    meta = message[\"params\"][\"_meta\"]\n    headers = {\n        \"Accept\": \"application/json, text/event-stream\",\n        \"Content-Type\": \"application/json\",\n        \"Origin\": origin,\n        \"MCP-Protocol-Version\": str(meta[VERSION_KEY]),\n        \"Mcp-Method\": str(message[\"method\"]),\n    }\n    name = body_name(message)\n    if name is not None:\n        headers[\"Mcp-Name\"] = encode_header_value(name)\n    if extra:\n        headers.update(extra)\n    return headers\n\n\ndef validate_request_structure(message: dict[str, Any]) -> str:\n    if message.get(\"jsonrpc\") != \"2.0\" or not isinstance(message.get(\"method\"), str):\n        raise RpcFault(-32600, \"Invalid Request\")\n    params = message.get(\"params\")\n    if not isinstance(params, dict):\n        raise RpcFault(-32602, \"params must be an object\")\n    meta = params.get(\"_meta\")\n    if not isinstance(meta, dict):\n        raise RpcFault(-32602, \"params._meta is required\")\n    version = meta.get(VERSION_KEY)\n    if not isinstance(version, str):\n        raise RpcFault(-32602, f\"{VERSION_KEY} is required\")\n    if not isinstance(meta.get(CAPABILITIES_KEY), dict):\n        raise RpcFault(-32602, f\"{CAPABILITIES_KEY} is required\")\n    client_info = meta.get(CLIENT_INFO_KEY)\n    if client_info is not None and (\n        not isinstance(client_info, dict)\n        or not isinstance(client_info.get(\"name\"), str)\n        or not isinstance(client_info.get(\"version\"), str)\n    ):\n        raise RpcFault(-32602, f\"{CLIENT_INFO_KEY} is malformed\")","sourceCodeStart":153,"sourceCodeEnd":189,"githubUrl":"https://github.com/rohitg00/ai-engineering-from-scratch/blob/39ea8a1c6d0b61f071226eff7ede4d4105fed820/phases/13-tools-and-protocols/09-mcp-transports/code/main.py#L153-L189","documentation":"Error \"Invalid Request\" thrown in rohitg00/ai-engineering-from-scratch.","triggerScenarios":"Thrown at phases/13-tools-and-protocols/09-mcp-transports/code/main.py:171 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"39ea8a1c6d0b61f071226eff7ede4d4105fed820","analyzedAt":"2026-08-26T03:13:46.626Z","schemaVersion":2},"datasetVersion":"2026-08-26T07:17:17.940Z"}