Troubleshooting If requests fail, run or Authentication All endpoints require the API key in a header: Environment Variables | Variable | Description | |---|---| | | n8n API key (generated in Settings → n8n API) | | | Base URL of your n8n instance, e.g. | Base URL All endpoints are at . The API is not available during the n8n Cloud free trial. For self-hosted instances it requires n8n ≥ 0.174. Workflows List Workflows With pagination (max 250 per page): Filter by tag: Get a Workflow Activate a Workflow Deactivate a Workflow Create a Workflow Write to : Update a Workflow Write the full updated…