API credentials hygiene

PURPOSE

Audits and hardens API credential handling (env vars, separation, rotation plan, least privilege, auditability).

WHEN TO USE

TRIGGERS: Harden the credentials setup for this integration and move secrets into env vars. Design a key rotation plan for these APIs with minimal downtime. Audit this service for least-privilege access and document what each key can do. Create an environment variable map and a secure .env template for this project. Set up credential separation for dev versus prod with clear audit trails. DO NOT USE WHEN… You want to obtain keys without authorization or bypass security controls. You need legal/compliance sign-off (this outputs technical documentation, not legal advice).

INPUTS

REQUIRED: List of integrations/APIs and where credentials are currently stored/used. Deployment context (local dev, server, container, n8n, etc.). OPTIONAL: Current config files/redacted snippets (.env, compose, systemd, n8n creds list). Org rules (rotation intervals, secret manager preference). EXAMPLES: “Keys are hard-coded in a Node script and an n8n HTTP Request node.” “We have dev and prod n8n instances and need separation.”

OUTPUTS

Credential map (service → env vars → scopes/permissions → owner → rotation cadence). Rotation runbook (steps + rollback). Least-privilege checklist and audit log plan. Optional: .env template (placeholders only). Success = no secrets committed or embedded, permissions minimized, rotation steps documented, and auditability defined.

WORKFLOW

Inventory credentials: where stored, where used, and who owns them. Define separation: dev vs prod; human vs service accounts; per-integration boundaries. Move secrets to env vars / secret manager references: create an env var map and update config plan (no raw keys in code/workflows). Least privilege: for each API, enumerate required actions and reduce scopes/roles accordingly. Rotation plan: dual-key overlap if supported; steps to rotate with minimal downtime; rollback. Auditability: define what events are logged (auth failures, token refresh, key use where available). STOP AND ASK THE USER if: required operations are unknown, secret injection method is unclear, rotation cadence/owners are unspecified.

OUTPUT FORMAT

• Credential map template:
• CREDENTIAL MAP
• Integration: <name>
• - Env vars:
• - <VAR_NAME>: <purpose> (secret/non-secret)
• - Permissions/scopes: <list>
• - Used by: <service/workflow>
• - Storage: <secret manager/env var>
• - Rotation: <cadence> | <owner> | <procedure>
• - Audit: <what is logged and where>
• If providing a template, output assets/dotenv-template.example with placeholders only.

SAFETY & EDGE CASES

Never output real secrets, tokens, or private keys. Use placeholders. Read-only by default; propose changes as a plan unless explicitly asked to modify files. Avoid over-broad scopes/roles unless justified by a documented requirement.

EXAMPLES

Input: “n8n HTTP nodes contain API keys.” Output: Env var map + plan to move to n8n credentials/env vars + rotation runbook. Input: “Need dev vs prod separation.” Output: Two env maps + naming scheme + access boundary checklist.