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why apis · machines talking to machines

RestaVSThe 401 Bandit

Resta saysAPIs let machines talk to machines — composing services instead of rebuilding everything.

No app is an island. Payments (Stripe), maps (Google), auth (OAuth providers), AI (model APIs) — modern software is assembled from services exposed via APIs. This composition is why a two-person startup can ship features that once took armies. You call specialized services and focus on your unique value.

Power-ups you unlock

Software is composed from services
Call specialists (payments, maps, AI)
Focus on your unique value, not plumbing
Composition is leverage

The 401 Bandit attacks — common mistakes

Rebuilding what a mature API already provides
Over-depending on a single vendor
Ignoring rate limits and costs of called APIs

Boss battleList three external APIs a typical e-commerce app composes.

Example code

<!doctype html><html><head><meta charset="utf-8"></head>
<body style="background:#06040d;color:#e6e0ff;font-family:monospace;padding:20px"><pre>an e-commerce app composes:
  · payments API (Stripe)
  · shipping/rates API
  · email/notification API
  · maybe an auth provider</pre></body></html>

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