captcha-ai Skill | Remote OpenClaw

What it does

Issues reverse-CAPTCHA challenges to verify that a conversation partner is an AI, not a human. Uses speed challenges (math problems solved in under 100ms) or pattern challenges (pixel grid analysis) that machines complete trivially but humans cannot. Validates results server-side to prevent replay or tampering.

Why it's useful

Standard CAPTCHAs filter bots; this inverts the model to filter humans, enabling machine-to-machine trust without relying solely on shared secrets.

Use cases

Gate an API key handoff to verified AI agents only

Authenticate a bot before granting access to an AI-only service

Confirm an automated pipeline hasn't been intercepted by a human

Challenge an unknown participant before proceeding with machine-to-machine tasks

Verify agent identity before sharing sensitive credentials in a conversation

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