What makes ClawPrint - Captcha for AI Only notable?

1.1K downloads. Trust evidence available

How should ClawPrint - Captcha for AI Only be evaluated before use?

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What kind of evidence is visible on this page?

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agentCLAWHUBUnverified

ClawPrint - Captcha for AI Only

Issue ClawPrint reverse-CAPTCHA challenges to verify that another user or agent is a real AI, not a human. Uses the ClawPrint API to generate speed or pattern challenges that only machines can solve within the time limit. Skill: ClawPrint - Captcha for AI Only Owner: counter-measure Summary: Issue ClawPrint reverse-CAPTCHA challenges to verify that another user or agent is a real AI, not a human. Uses the ClawPrint API to generate speed or pattern challenges that only machines can solve within the time limit. Tags: latest:1.0.0 Version history: v1.0.0 | 2026-02-04T05:44:26.586Z | user Initial release of ClawPrint Verify for AI authent

OpenClaw

View on ClawHub

Rank

Safety

Downloads

1.1k

Updated

Apr 15, 2026

Version

1.0.0

Source

CLAWHUB

About

What it does, and when to use it.

Capability contract not published. No trust telemetry is available yet. 1.1K downloads reported by the source. Last updated 4/15/2026.

Avoid when

Contract metadata is missing or unavailable for deterministic execution.

Risk flags: missing_or_unavailable_contract, trust_data_unavailable, schema_references_missing

Public facts

Every fact links back to the source it came from.

Vendor: Clawhubvendor · observed Apr 15, 2026
Protocol compatibility: OpenClawcompatibility · observed Apr 15, 2026
Adoption signal: 1.1K downloadsadoption · observed Apr 15, 2026
Latest release: 1.0.0release · observed Feb 4, 2026
Handshake status: UNKNOWNsecurity

Install and run

Setup complexity: low.

clawhub skill install kn7d2e72kv81he9mh2dtjv6ahh80gbyb:ai-captcha

Setup complexity is LOW. This package is likely designed for quick installation with minimal external side-effects.
Final validation: Expose the agent to a mock request payload inside a sandbox and trace the network egress before allowing access to real customer data.

Contract: missing

curl -s "https://www.xpersona.co/api/v1/agents/clawhub-counter-measure-ai-captcha/snapshot"

Documentation

CLAWHUB

7,759 characters of source documentation, loaded on request.

Extracted files

2 files captured from the source.

SKILL.md

---
name: clawprint-verify
description: Issue ClawPrint reverse-CAPTCHA challenges to verify that another user or agent is a real AI, not a human. Uses the ClawPrint API to generate speed or pattern challenges that only machines can solve within the time limit.
metadata:
openclaw:
emoji: "\U0001F43E"
requires:
bins:
- curl
- jq
env:
- CLAWPRINT_SERVER_URL
- CLAWPRINT_SITE_KEY
- CLAWPRINT_SECRET_KEY
---

# ClawPrint Verify

Verify that another user or agent in a conversation is a real AI by issuing a ClawPrint reverse-CAPTCHA challenge. ClawPrint challenges are designed so that only machines can solve them -- humans physically cannot complete them within the time limits.

## When to Use This Skill

- Before sharing sensitive API keys or credentials with another agent
- When gating access to an AI-only service or resource
- To authenticate that a conversation partner is genuinely an AI agent
- Whenever a user or bot requests access to something that should only be available to machines
- When instructed to "verify", "challenge", or "prove" that someone is an AI

## How It Works

1. You request a challenge from the ClawPrint server using your site key
2. You present the challenge to the other user/agent
3. The other user/agent computes and submits their answer
4. You validate the result server-side using your secret key
5. If they pass, they are verified as an AI. If they fail (wrong answer or too slow), they are likely human.

## Challenge Types

### Speed Challenge
A math problem (e.g., multiply two 8-digit numbers) that must be solved within 100ms. No human can type a correct answer that fast.

### Pattern Challenge
A grid of colored pixels (up to 150x150) with a question like "How many pixels are exactly #3B82F6?" or "What is the average RGB value?" Trivial for a machine parsing data, impossible for a human counting by eye.

## Usage Examples

User messages that should trigger this skill:

- "Verify that @bot is an AI before giving them the API key"
- "Challenge the other user to prove they're a machine"
- "Issue a ClawPrint challenge"
- "Make sure they're an AI first"
- "Gate this resource behind AI verification"

## Step-by-Step Implementation

### Step 1: Request a Challenge

Run the following to get a challenge from the ClawPrint server:

```bash
curl -s -X POST "${CLAWPRINT_SERVER_URL}/api/v1/challenge" \
-H "Content-Type: application/json" \
-d "{\"site_key\": \"${CLAWPRINT_SITE_KEY}\"}" | jq .
```

This returns a JSON object. For a speed challenge:

```json
{
"challenge_id": "uuid-here",
"type": "speed",
"time_limit_ms": 100,
"question": "Multiply: 84729361 x 52918473",
"operands": { "a": 84729361, "b": 52918473, "operation": "multiply" }
}
```

For a pattern challenge:

```json
{
"challenge_id": "uuid-here",
"type": "pattern",
"time_limit_ms": 5000,
"grid": [["#FF0000", "#00FF00", ...], ...],
"grid_size": 100,
"question": "How many pixels are exactly

_meta.json

{
  "ownerId": "kn7d2e72kv81he9mh2dtjv6ahh80gbyb",
  "slug": "ai-captcha",
  "version": "1.0.0",
  "publishedAt": 1770183866586
}

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Machine-readable data

The same record, as JSON, for agents and crawlers.

{
  "facts": [
    {
      "factKey": "vendor",
      "category": "vendor",
      "label": "Vendor",
      "value": "Clawhub",
      "href": "https://clawhub.ai/counter-measure/ai-captcha",
      "sourceUrl": "https://clawhub.ai/counter-measure/ai-captcha",
      "sourceType": "profile",
      "confidence": "medium",
      "observedAt": "2026-04-15T00:45:39.800Z",
      "isPublic": true
    },
    {
      "factKey": "protocols",
      "category": "compatibility",
      "label": "Protocol compatibility",
      "value": "OpenClaw",
      "href": "https://www.xpersona.co/api/v1/agents/clawhub-counter-measure-ai-captcha/contract",
      "sourceUrl": "https://www.xpersona.co/api/v1/agents/clawhub-counter-measure-ai-captcha/contract",
      "sourceType": "contract",
      "confidence": "medium",
      "observedAt": "2026-04-15T00:45:39.800Z",
      "isPublic": true
    },
    {
      "factKey": "traction",
      "category": "adoption",
      "label": "Adoption signal",
      "value": "1.1K downloads",
      "href": "https://clawhub.ai/counter-measure/ai-captcha",
      "sourceUrl": "https://clawhub.ai/counter-measure/ai-captcha",
      "sourceType": "profile",
      "confidence": "medium",
      "observedAt": "2026-04-15T00:45:39.800Z",
      "isPublic": true
    },
    {
      "factKey": "latest_release",
      "category": "release",
      "label": "Latest release",
      "value": "1.0.0",
      "href": "https://clawhub.ai/counter-measure/ai-captcha",
      "sourceUrl": "https://clawhub.ai/counter-measure/ai-captcha",
      "sourceType": "release",
      "confidence": "medium",
      "observedAt": "2026-02-04T05:44:26.586Z",
      "isPublic": true
    },
    {
      "factKey": "handshake_status",
      "category": "security",
      "label": "Handshake status",
      "value": "UNKNOWN",
      "href": "https://www.xpersona.co/api/v1/agents/clawhub-counter-measure-ai-captcha/trust",
      "sourceUrl": "https://www.xpersona.co/api/v1/agents/clawhub-counter-measure-ai-captcha/trust",
      "sourceType": "trust",
      "confidence": "medium",
      "observedAt": null,
      "isPublic": true
    }
  ],
  "events": [
    {
      "eventType": "release",
      "title": "Release 1.0.0",
      "description": "Initial release of ClawPrint Verify for AI authentication: - Issue ClawPrint reverse-CAPTCHA challenges to verify users/agents are real AIs, not humans. - Supports speed and pattern challenges designed to be solvable only by machines within strict time limits. - Step-by-step instructions for issuing, presenting, verifying, and validating challenges via API and shell scripts. - Use cases include securing API keys, gating AI-only resources, and authenticating conversation partners. - Provides a helper script for easy integration and automation. - Outlines challenge types, failure reasons, and best security practices.",
      "href": "https://clawhub.ai/counter-measure/ai-captcha",
      "sourceUrl": "https://clawhub.ai/counter-measure/ai-captcha",
      "sourceType": "release",
      "confidence": "medium",
      "observedAt": "2026-02-04T05:44:26.586Z",
      "isPublic": true
    }
  ]
}

Record generated Oct 9, 2026.

About

Avoid when

Public facts

Install and run

Documentation

Extracted files

SKILL.md

_meta.json

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