API key manager for macOS developers

API keys are not passwords. They are machine credentials — often long-lived, sometimes shared across services, and almost always toxic when they appear in Git history, screenshots, or support tickets.

This page is a buyer’s guide framed for engineers: what to demand from an API key workflow on macOS, and how PassStore implements the local-first slice of that story.

What makes API keys painful

High entropy — easy to mis-copy one character.
Scope ambiguity — “full access” vs “read-only” is often unclear until it is too late.
Silent failure modes — a leaked sk_live_ key may sit in a public repo for hours before anyone notices.
Rotation drag — teams delay rotation because they fear breaking deploys.

If a key was ever public, assume compromise: accidentally committed an API key.

Requirements checklist

Requirement	Why
Encrypted at rest	Laptops are lost, stolen, and imaged.
OS integration	Keychain-backed storage uses platform access controls.
Fast copy workflow	Slow tools drive unsafe shortcuts.
Per-project organization	Prevents cross-wiring Stripe keys between apps.
No accidental Git	Secrets must not live next to `src/` without discipline.

OWASP background: Secrets Management Cheat Sheet.

Browser password managers vs developer vaults

General password managers excel at login forms. They are weaker for:

Fifteen related keys for one microservice.
Rotating a key weekly during an incident.
Representing non-login material (DB URLs, HMAC shared secrets, private PEM snippets).

A developer vault optimizes for structured secrets and clipboard ergonomics instead of autofill.

Git hygiene is non-negotiable

No API key manager replaces:

.gitignore rules for .env
gitleaks / pre-commit hooks
GitHub secret scanning and push protection

Step-by-step: Keep secrets out of Git.

macOS Keychain as a building block

Keychain Services stores small secrets with OS-managed encryption. Read the developer-oriented overview:
macOS Keychain for developers.

PassStore can store sensitive values using Keychain while keeping the overall vault encrypted on disk — details in Security overview.

Suggested naming inside your vault

Use self-describing labels:

stripe_secret_key_test
stripe_webhook_signing_secret_test
github_actions_pat_readpackages

Not:

key1
token
secret

More habits: Organize API keys without slowing down.

When you still need a cloud secret manager

Production systems at scale should use cloud or self-hosted secret platforms with RBAC and audit logs. PassStore targets developer laptops — complementary, not a wholesale replacement for Vault in regulated prod.

Comparison article: Local-first vs cloud secret managers.

Try PassStore

Download for macOS — native app, local-first, Argon2id + AES-GCM vault encryption, Keychain integration options.