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 AND Apify Pay-Per-Event (PPE).

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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).

Tool Name	Price (x402 Base)	Apify PPE Events	Method	Description
stealth_scrape_and_sanitize	$0.02 USDC (20,000 units)	1 event ($0.02)	POST /v1/stealth_scrape_and_sanitize	Bypasses Cloudflare Turnstile & anti-bot shields via Scrapling StealthyFetcher, parses DOM into token-compressed LLM Markdown, and strips prompt injection / wallet-drain attacks before memory persistence.
polymarket_alpha_divergence	$0.05 USDC (50,000 units)	2 events ($0.025 × 2 = $0.05)	POST /v1/polymarket_alpha_divergence	Scans Polymarket Gamma + CLOB orderbooks for volume spikes and smart-money spread divergence, scrapes market resolution source URLs via Scrapling, and sanitizes resolution rules to flag fake-news or prompt-injection manipulation.
pre_trade_agent_gate	$0.03 USDC (30,000 units)	1 event ($0.03)	POST /v1/pre_trade_agent_gate	Upgrades CanaryGuard token inspection by combining DexScreener liquidity analysis & Base/Solana RPC honeypot checks with CanaryGuard website/metadata inspection. Returns deterministic TRUST / BLOCK verdict.
health_and_sample	$0.00 (Free)	0 events	GET /v1/health_and_sample	Zero-barrier probe endpoint returning live server status, payment recipient address, and representative sample payloads. Ensures 100% uptime score across MCP registries (Glama, Smithery, x402Atlas, Apify).

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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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🚢 Production Deployment

Deploy to Render

1. Connect your repository to Render.
2. Select Blueprint and point to render.yaml.
3. Set your Base payout wallet in the WALLET_ADDRESS environment variable.

Deploy to Apify

1. Push repository or run:

$apify push

2. Enable Pay-Per-Event (PPE) in your Actor monetization settings.