Managing Secrets and Environment Variables in n8n

n8n’s growing use as an automation platform for AI agents increases the importance of managing the numerous API keys, tokens, and passwords it stores for connected services, since compromised instances or poorly controlled workflow access can expose sensitive credentials and credential rotation can disrupt many workflows at once. By default, n8n encrypts credentials in its database and lets workflows reference them centrally, but administrators retain broad access and Code nodes may expose stored secrets or environment variables unless isolation and access controls are configured carefully. A dedicated secrets manager can centralize storage, access policies, auditing, rotation, and short-lived credentials, with options for supplying values through environment variables, credential overwrites, enterprise external-secret integrations, or workflow-level API calls. Each approach has different trade-offs for security, licensing, visibility, execution-data leakage, and how quickly rotated credentials reach running workflows. Separating development, staging, and production into distinct n8n instances with narrowly scoped machine identities is recommended, while AI agent workflows require particular care because agents may dynamically select tools and credentials; credential brokering can allow agents to use services without ever receiving the underlying secrets.

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