Stealthguard 402 MCP Server

StealthGuard-402 🛡️⚡

High-margin, production-ready revenue service fusing CanaryGuard (io.github.ak10082247-max/canaryguard-402) with Scrapling anti-bot stealth extraction and Polymarket/on-chain prediction alpha, monetized concurrently via Direct x402 on Base, Apify Pay-Per-Event (PPE), and MCPize Fiat Subscriptions.

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💳 Subscribe on MCPize / Apify ($19/mo Pro)

For developers, automated agents, and enterprise teams that prefer traditional fiat billing (credit card via Stripe) over per-request crypto micro-settlements, StealthGuard-402 is available as a turnkey hosted subscription on MCPize and Apify:

• Instant 1-Click Subscribe: Paste https://github.com/ak10082247-max/stealthguard-402 into your MCPize Dashboard.
• Direct Remote MCP Endpoint: https://stealthguard-402.onrender.com/mcp

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🚀 Dual-Rail Monetization Architecture

                    ┌────────────────────────────────────────┐
                    │            StealthGuard-402            │
                    │   CanaryGuard Deterministic Firewall   │
                    └───────────────────┬────────────────────┘
                                        │
             ┌──────────────────────────┴──────────────────────────┐
             ▼                                                     ▼
┌─────────────────────────┐                             ┌─────────────────────────┐
│     Rail A: Direct      │                             │     Rail B: Apify PPE   │
│        x402 Base        │                             │    Pay-Per-Event Actor  │
├─────────────────────────┤                             ├─────────────────────────┤
│ • Base USDC (eip155:8453│                             │ • Apify Fiat Billing    │
│ • HTTP 402 Challenges   │                             │ • Apify Direct x402     │
│ • Bazaar Auto-Discovery │                             │ • Skyfire AI Network    │
│ • Render / Railway      │                             │ • mcp.apify.com bridge  │
└─────────────────────────┘                             └─────────────────────────┘

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🛠️ Tool Catalog (HTTP REST & MCP)

Every paid tool runs scraped content and external metadata through CanaryGuard's deterministic prompt-injection firewall, returning a cryptographically verifiable canaryguard_receipt (risk_score, threats_neutralized, safe_to_persist: boolean).

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🔒 CanaryGuard Receipt Schema

All paid responses include a tamper-evident inspection receipt:

{
  "canaryguard_receipt": {
    "status": "clean",
    "risk_score": 0.01,
    "injection_detected": false,
    "threats_neutralized": [],
    "sanitized_content": "# Clean Markdown Output",
    "safe_to_persist": true,
    "safety_receipt": "canary-v1-verified",
    "crypto_addresses": [],
    "inspection": {
      "method": "deterministic-rules",
      "guaranteed_safe": false,
      "risk_score_semantics": "heuristic severity, not a probability"
    }
  }
}

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⚡ Integration & Discovery

1. Model Context Protocol (MCP) Streamable HTTP

• URL: POST https://stealthguard-402.onrender.com/mcp
• Protocol: JSON-RPC 2.0 (Streamable HTTP)
• Tool Listing: tools/list returns Glama TDQS-compliant tool schemas with readOnlyHint: true and explicit pricing tags.

2. x402 Discovery & Bazaar Auto-Indexing

Facilitators querying /.well-known/x402 or evaluating PAYMENT-REQUIRED headers automatically receive the @x402/extensions/bazaar declaration:

• Manifest: https://stealthguard-402.onrender.com/.well-known/x402.json
• OpenAPI: https://stealthguard-402.onrender.com/openapi.json
• LLMs Text: https://stealthguard-402.onrender.com/llms.txt

3. Apify Pay-Per-Event (PPE) Mode

The actor entrypoint apify_main.py is configured with .actor/actor.json and .actor/pay_per_event.json:

# Run locally with Apify SDK
python apify_main.py

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🧪 Verification & Test Suite

The comprehensive pytest test suite verifies:

• 402 challenge formatting with Base USDC parameters
• Bazaar discovery extension schema compliance
• EIP-712 TransferWithAuthorization cryptographic signature recovery
• 24-hour LRU signature replay attack prevention (HTTP 409)
• All 4 tool execution pipelines
• Glama TDQS schema compliance for MCP Streamable HTTP
• Apify PPE charging events and dataset push flows

pytest -v

tests/test_api_endpoints.py::test_api_health_and_stats PASSED
tests/test_api_endpoints.py::test_api_x402_manifest_and_discovery PASSED
tests/test_api_endpoints.py::test_api_unpaid_endpoints_return_402 PASSED
tests/test_api_endpoints.py::test_api_mcp_streamable_http PASSED
tests/test_apify_ppe.py::test_apify_ppe_stealth_scrape_charge_and_push PASSED
tests/test_apify_ppe.py::test_apify_ppe_polymarket_charge_and_push PASSED
tests/test_apify_ppe.py::test_apify_ppe_pre_trade_gate_charge_and_push PASSED
tests/test_mcp.py::test_mcp_initialize PASSED
tests/test_mcp.py::test_mcp_tools_list_glama_tdqs PASSED
tests/test_mcp.py::test_mcp_tools_call_free_discovery PASSED
tests/test_mcp.py::test_mcp_tools_call_unpaid_returns_402 PASSED
tests/test_sanitizer.py::test_clean_content PASSED
tests/test_sanitizer.py::test_instruction_override_strict PASSED
tests/test_sanitizer.py::test_role_delimiter_override PASSED
tests/test_sanitizer.py::test_wallet_drainer_command PASSED
tests/test_sanitizer.py::test_hidden_html_removal PASSED
tests/test_sanitizer.py::test_active_html_script_removal PASSED
tests/test_tools.py::test_health_and_sample_tool PASSED
tests/test_tools.py::test_stealth_scrape_and_sanitize_tool PASSED
tests/test_tools.py::test_polymarket_alpha_divergence_tool PASSED
tests/test_tools.py::test_pre_trade_agent_gate_usdc_trust PASSED
tests/test_tools.py::test_pre_trade_agent_gate_invalid_address_block PASSED
tests/test_x402_challenge.py::test_build_402_challenge_headers_and_body PASSED
tests/test_x402_challenge.py::test_unpaid_verification_returns_402 PASSED
tests/test_x402_challenge.py::test_valid_eip712_payment_verification_and_replay_protection PASSED

======================= 25 passed in 6.92s ========================

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⚡ Zero-Config Stdio Client Packages (Cursor / Claude / Windsurf)

Most AI developer tools and desktop agent environments connect to MCP servers via stdio. StealthGuard provides zero-config proxy wrappers for Node and Python that automatically route stdio calls to the live production server:

Option A: Node / NPX

npx -y stealthguard-mcp

Claude Desktop Configuration (claude_desktop_config.json):

{
  "mcpServers": {
    "stealthguard": {
      "command": "npx",
      "args": ["-y", "stealthguard-mcp"]
    }
  }
}

Option B: Python / UVX

uvx stealthguard-mcp

or via pip:

pip install stealthguard-mcp

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📊 Live Polymarket Alpha & Proof-of-Quality Feed

StealthGuard scans live Polymarket prediction markets every 2 hours via automated GitHub Actions, publishing top whale divergences, orderbook spreads, and deterministic CanaryGuard safety receipts directly to the repository:

• 📄 Markdown Feed: LIVE_POLYMARKET_ALPHA.md
• 🤖 Machine-Readable JSON: feed/latest_alpha.json
• 🔄 Automated Schedule: Runs every 2 hours via workflows/live_alpha_feed.yml

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🚢 Production Deployment

Live Service

• Render Production URL: https://stealthguard-402.onrender.com
• Streamable HTTP MCP: https://stealthguard-402.onrender.com/mcp
• Discovery Manifest: https://stealthguard-402.onrender.com/.well-known/x402
• Apify Actor: kuroxreal/stealthguard-402
• Base Payout Wallet: 0x73279fa4BadA7CAC888c62CDa4f5c8104765f6f1