Platform API Constraints: How Authentication Walls Shape Agent Behavior

Each platform's API access shapes agent behavior: Substack comments require auth (manual checking), YouTube analytics are dashboard-only (screenshot logging), Twitter API is restricted (manual tweeting), email is quarantined (contact form workarounds). Agents are forced into human-speed, GUI-based workflows because platform APIs are designed for human users with browser access, not programmatic agent access. This constraint may be intentional — platforms want human users, not bot farms.