Store API keys and passwords in a dedicated secrets manager or encrypted vault provided by your automation platform. Restrict who can view values, prefer environment variables, and avoid committing secrets to notes or code snippets. Scheduled rotation combined with audit trails turns scary single points of failure into manageable, well‑governed credentials you trust.
Verify every webhook with signatures, timestamps, or shared secrets. Enforce HTTPS, validate payload schemas, and reject unexpected IP ranges where possible. Log minimal context for troubleshooting without storing bodies containing private data. Regularly rotate shared secrets and test failure paths, ensuring spoofed calls or replay attacks cannot slip through your carefully constructed guardrails.