Third-Party Integrations: Every API Key Is a Key to Something

Connect a shipping calculator, an email tool, a review widget, an accounting sync — each one asks for an API key, and each key is a standing permission to act on your store without logging in. Owners guard their admin password carefully, then hand out keys with far broader powers and never think about them again.

A key is a password that never gets challenged

API keys skip everything that protects your login: no two-factor prompt, no unusual-location alert, no lockout after failed attempts. Whoever holds the key simply is your store, up to whatever the key allows. That's what makes leaked keys so valuable — they work quietly, from anywhere, until someone revokes them.

Grant the least the job needs

Most platforms let you scope keys when you create them. In Shopify, a custom app can be limited to read_products instead of full write access to orders and customers. Stripe offers restricted keys where you enable only the endpoints an integration touches. A review widget needs to read products — it does not need to edit customers, issue refunds, or install scripts. If a vendor insists on full access for a narrow job, treat that as a red flag about the vendor.

Rotate on a schedule, not just after a scare

Keys accumulate exposure over time — pasted into support tickets, stored in a contractor's notes, sitting in an old laptop's config file. Rotating means issuing a new key, updating the integration, and revoking the old one; most platforms make this a five-minute task. Twice a year is a reasonable rhythm for a small store, immediately if a developer or agency relationship ends.

Audit what's connected — quarterly

Open your platform's connected apps or API credentials page and read the list slowly. You'll almost always find something surprising: the abandoned trial from two years ago, the agency that finished the project in 2024, the app nobody remembers installing. Every entry you can't explain gets revoked today — a legitimate integration will break loudly and can be reconnected properly; a forgotten one just closes a door.

Keep keys out of places that get copied

The most common leak isn't hacking — it's keys pasted into code that gets pushed to a public repository, shared in email threads, or hardcoded into theme files that end up in backups. Store keys in your platform's environment settings or a password manager, and never send one over email or chat where it lives forever in someone's archive.

Third-party connections widen your attack surface in ways that are easy to lose track of. Trust Guard's scanning helps you spot exposure across your site before someone else does — a sensible companion to a clean, current list of who holds your keys.