CAPTCHAS + OpenClaw

Use this skill when integrating CAPTCHAS with OpenClaw via OpenResponses tools or OpenClaw plugin tools.

Configuration

Set environment variables:

• CAPTCHAS_ENDPOINT = https://agent.captchas.co
• CAPTCHAS_API_KEY = \x3Cyour-api-key>

Headers:

• x-api-key: required (use CAPTCHAS_API_KEY).
• x-domain: optional; validated if provided.

Notes:

• site_key is optional; if omitted, it resolves from the API key or account default.
• Avoid sending PII in signals.

OpenResponses Tool Schemas (OpenClaw Gateway)

Use the OpenClaw tools array shape when calling the Gateway /v1/responses endpoint.

{
  "tools": [
    {
      "type": "function",
      "function": {
        "name": "captchas_agent_verify",
        "description": "Run CAPTCHAS Agent Verify and return a decision (allow|deny|challenge).",
        "parameters": {
          "type": "object",
          "properties": {
            "site_key": {"type": "string"},
            "action": {"type": "string"},
            "signals": {"type": "object", "additionalProperties": true},
            "capabilities": {
              "oneOf": [
                {"type": "object", "additionalProperties": true},
                {"type": "array", "items": {"type": "string"}}
              ]
            },
            "verification_mode": {"type": "string", "enum": ["backend_linked", "agent_only"]},
            "challenge_source": {"type": "string", "enum": ["bank", "ai_generated"]},
            "input_type": {"type": "string", "enum": ["choice", "image", "behavioral"]},
            "media_url": {"type": "string"},
            "media_type": {"type": "string"}
          },
          "required": [],
          "additionalProperties": false
        }
      }
    },
    {
      "type": "function",
      "function": {
        "name": "captchas_agent_challenge_complete",
        "description": "Complete a challenge and mint a verification token when passed.",
        "parameters": {
          "type": "object",
          "properties": {
            "challenge_id": {"type": "string"},
            "site_key": {"type": "string"},
            "answer": {"type": "string"}
          },
          "required": ["challenge_id", "answer"],
          "additionalProperties": false
        }
      }
    },
    {
      "type": "function",
      "function": {
        "name": "captchas_agent_token_verify",
        "description": "Verify an opaque CAPTCHAS token before completing a sensitive action.",
        "parameters": {
          "type": "object",
          "properties": {
            "token": {"type": "string"},
            "site_key": {"type": "string"},
            "domain": {"type": "string"}
          },
          "required": ["token"],
          "additionalProperties": false
        }
      }
    }
  ]
}

OpenClaw Plugin Tool Registration

Register tools using api.registerTool(...) and the same JSON Schema parameters as above.

Example:

api.registerTool({
  name: "captchas_agent_verify",
  description: "Run CAPTCHAS Agent Verify and return a decision (allow|deny|challenge).",
  parameters: {
    type: "object",
    properties: {
      site_key: { type: "string" },
      action: { type: "string" },
      signals: { type: "object", additionalProperties: true }
    },
    required: [],
    additionalProperties: false
  },
  async execute(_id, params) {
    return { content: [{ type: "text", text: JSON.stringify(params) }] };
  }
});

References

• Use /v1/agent/verify, /v1/agent/challenge/:id/complete, and /v1/agent/token-verify as the canonical API calls.
• See captchas-human-verification/SKILL.md for workflow guidance.