n8n-io/n8n · error · NodeOperationError

The name of this tool is not a valid alphanumeric string

Error message

The name of this tool is not a valid alphanumeric string

What it means

Error "The name of this tool is not a valid alphanumeric string" thrown in n8n-io/n8n.

Source

Thrown at packages/@n8n/nodes-langchain/nodes/tools/ToolHttpRequest/ToolHttpRequest.node.ts:262

				displayOptions: {
					show: {
						sendBody: [true],
						specifyBody: ['json'],
					},
				},
			},
			//----------------------------------------------------------------
			placeholderDefinitionsCollection,
			...optimizeResponseProperties,
		],
	};

	async supplyData(this: ISupplyDataFunctions, itemIndex: number): Promise<SupplyData> {
		const name = nodeNameToToolName(this.getNode());
		try {
			tryToParseAlphanumericString(name);
		} catch (error) {
			throw new NodeOperationError(
				this.getNode(),
				'The name of this tool is not a valid alphanumeric string',
				{
					itemIndex,
					description:
						"Only alphanumeric characters and underscores are allowed in the tool's name, and the name cannot start with a number",
				},
			);
		}

		const toolDescription = this.getNodeParameter('toolDescription', itemIndex) as string;
		const sendQuery = this.getNodeParameter('sendQuery', itemIndex, false) as boolean;
		const sendHeaders = this.getNodeParameter('sendHeaders', itemIndex, false) as boolean;
		const sendBody = this.getNodeParameter('sendBody', itemIndex, false) as boolean;

		const requestOptions: IHttpRequestOptions = {
			method: this.getNodeParameter('method', itemIndex, 'GET') as IHttpRequestMethods,
			url: this.getNodeParameter('url', itemIndex) as string,

View on GitHub (pinned to 5ac6606e81)

When it happens

Trigger: Thrown at packages/@n8n/nodes-langchain/nodes/tools/ToolHttpRequest/ToolHttpRequest.node.ts:262 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of n8n-io/n8n@5ac6606e81 (2026-08-12). Data as JSON: /api/errors/4d4c2b2c3ca29710. Report an issue: GitHub.