What is the key difference between Agntor MCP and Captcha MCP?

Agntor MCP belongs to the Security category with local stdio execution, while Captcha MCP belongs to the Security category with local stdio execution.

How do I install Agntor MCP or Captcha MCP in Claude Desktop or Cursor?

Copy the mcpServers JSON configuration snippet provided on this page into your claude_desktop_config.json or ~/.cursor/mcp.json file and restart your AI client.

Are Agntor MCP and Captcha MCP free or paid?

Agntor MCP operates under a BYOK (Pay Provider Direct) model (API Key required). Captcha MCP operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

Agntor MCP lists 14 tools with 3 views and 1 GitHub stars. Captcha MCP lists 6 tools with 2 views and 1 GitHub stars.

Can I use both Agntor MCP and Captcha MCP together in the same MCP host?

Yes! MCP hosts like Claude Desktop, Cursor, Windsurf, Cline, and VS Code support configuring multiple servers under the mcpServers object simultaneously.

Side-by-Side Model Context Protocol Comparison

Agntor MCP vs Captcha MCP

In-depth architectural comparison of the Agntor MCP and Captcha MCP MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

At a Glance & Executive Verdict

Agntor MCP

Security · Local stdio

Quality: 55/100 (Good) | Auth: API Key required

Captcha MCP

Security · Local stdio

Quality: 56/100 (Good) | Auth: No auth required

Verdict Summary: Choose Agntor MCP if you need specialized Security tools running via a local process. Choose Captcha MCP if your workspace requires Security integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Agntor MCP when:

You need dedicated capabilities in the Security domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: API Key required (BYOK (Pay Provider Direct)).
You have access to required keys: AGNTOR_API_KEY, AGNTOR_MCP_AUTH_KEY, AGNTOR_SECRET_KEY, AGNTOR_API_URL, PORT, MCP_TRANSPORT.
Primary tools included: get_agent_card, get_agent_registration, check_agent_pulse.

Explore Agntor MCP Details

Choose Captcha MCP when:

You need dedicated capabilities in the Security domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
You have access to required keys: CAPTCHA_URL, HTTP_MODE, PORT.
Primary tools included: Challenge, verify, and status MCP tools, SHA-256 proof-of-work free tier, L402 Lightning payment support.

Feature & Specification Comparison

Specification	Agntor MCP agntor Security	Captcha MCP zekebuilds-lab Security
Summary	MCP audit server for agent discovery and certification. Provides trust and payment rail for AI agents including identity verification, escrow, settlement, and reputation management.	L402 Lightning paywall + Hashcash proof-of-work gate for MCP tool calls. Free tier solves a PoW challenge; paid tier pays a Lightning invoice via self-hosted LNBits. No accounts, no API keys, no third-party SaaS. Drop-in middleware for any MCP server. npx @powforge/captcha-mcp.
Category & Scope

Tools & Capabilities Breakdown

Agntor MCP Tools (14)

get_agent_card

Retrieve the verifiable AgentCard (Passport) for an agent

get_agent_registration

Get EIP-8004 compatible registration file for agent discovery

check_agent_pulse

Get real-time health and behavioral metrics

is_agent_certified

Quick boolean check if an agent has valid certification

get_trust_score

Calculate comprehensive trust score with behavioral factors

register_agent

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

Agntor MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "agntor-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@agntor/mcp"
      ],
      "env": {
        "AGNTOR_API_KEY": "YOUR_AGNTOR_API_KEY_HERE",
        "AGNTOR_MCP_AUTH_KEY": "YOUR_AGNTOR_MCP_AUTH_KEY_HERE",
        "AGNTOR_SECRET_KEY": "YOUR_AGNTOR_SECRET_KEY_HERE",
        "AGNTOR_API_URL": "YOUR_AGNTOR_API_URL_HERE",
        "PORT": "YOUR_PORT_HERE",
        "MCP_TRANSPORT": "YOUR_MCP_TRANSPORT_HERE"
      }
    }
  }
}

Captcha MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "zekebuilds-lab-captcha-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@powforge/captcha-mcp"
      ],
      "env": {
        "CAPTCHA_URL": "YOUR_CAPTCHA_URL_HERE",
        "HTTP_MODE": "YOUR_HTTP_MODE_HERE",
        "PORT": "YOUR_PORT_HERE"
      }
    }
  }
}

Frequently Asked Questions

Agntor MCP is categorized under Security and uses a local stdio subprocess. In contrast, Captcha MCP belongs to Security using local stdio subprocess. Select Agntor MCP when you need capabilities focused on security and Captcha MCP when you require tools for security.

More alternatives to Agntor MCP More alternatives to Captcha MCP Security category hub