n8n-io/n8n · error · NodeOperationError

API key is required to use Zep Cloud

Error message

API key is required to use Zep Cloud

What it means

Error "API key is required to use Zep Cloud" thrown in n8n-io/n8n.

Source

Thrown at packages/@n8n/nodes-langchain/nodes/memory/MemoryZep/MemoryZep.node.ts:147

			apiUrl?: string;
			cloud?: boolean;
		}>('zepApi');

		const nodeVersion = this.getNode().typeVersion;

		let sessionId;

		if (nodeVersion >= 1.2) {
			sessionId = getSessionId(this, itemIndex);
		} else {
			sessionId = this.getNodeParameter('sessionId', itemIndex) as string;
		}

		let memory: BaseChatMemory;

		if (credentials.cloud) {
			if (!credentials.apiKey) {
				throw new NodeOperationError(this.getNode(), 'API key is required to use Zep Cloud');
			}
			memory = new WhiteSpaceTrimmedZepCloudMemory({
				sessionId,
				apiKey: credentials.apiKey,
				memoryType: 'perpetual',
				memoryKey: 'chat_history',
				returnMessages: true,
				inputKey: 'input',
				outputKey: 'output',
				separateMessages: false,
			});
		} else {
			if (!credentials.apiUrl) {
				throw new NodeOperationError(this.getNode(), 'API url is required to use Zep Open Source');
			}
			memory = new ZepMemory({
				sessionId,
				baseURL: credentials.apiUrl,

View on GitHub (pinned to 5ac6606e81)

When it happens

Trigger: Thrown at packages/@n8n/nodes-langchain/nodes/memory/MemoryZep/MemoryZep.node.ts:147 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/a067855f70e637f7. Report an issue: GitHub.