feat: Add Modal API fallback for scraping

- Created modal_api.py module for Modal GLM API integration
- Provides fallback when direct scraping fails
- Can parse eBay listings and other marketplace data
- Configuration via modal_config.json
- Ready to use when direct scraping is blocked

API endpoint configured:
- Model: zai-org/GLM-5.1-FP8
- Endpoint: https://api.us-west-2.modal.direct/v1/chat/completions
- Usage: scrape_with_modal(url, task)

agents/cast-iron-scout/modal_api.py

@@ -0,0 +1,140 @@
+#!/usr/bin/env python3
+"""
+Modal API Fallback
+Use Modal's GLM API for scraping assistance when direct scraping fails
+"""
+import requests
+import json
+from pathlib import Path
+
+CONFIG_FILE = Path(__file__).parent / "modal_config.json"
+
+def get_modal_token():
+    """Get Modal API token from config"""
+    if CONFIG_FILE.exists():
+        config = json.loads(CONFIG_FILE.read_text())
+        return config.get('token')
+    return None
+
+def save_modal_token(token):
+    """Save Modal API token"""
+    CONFIG_FILE.write_text(json.dumps({'token': token}, indent=2))
+
+def scrape_with_modal(url, task="Extract product information including title, price, and condition"):
+    """
+    Use Modal API to scrape a URL
+    
+    Args:
+        url: URL to scrape
+        task: What to extract from the page
+    
+    Returns:
+        dict with extracted data or None if failed
+    """
+    token = get_modal_token()
+    if not token:
+        print("❌ Modal API token not configured")
+        return None
+    
+    try:
+        response = requests.post(
+            "https://api.us-west-2.modal.direct/v1/chat/completions",
+            headers={
+                "Content-Type": "application/json",
+                "Authorization": f"Bearer {token}"
+            },
+            json={
+                "model": "zai-org/GLM-5.1-FP8",
+                "messages": [
+                    {
+                        "role": "system",
+                        "content": "You are a web scraping assistant. Extract structured data from web pages. Return JSON only."
+                    },
+                    {
+                        "role": "user",
+                        "content": f"{task}\n\nURL: {url}\n\nReturn: title, price, condition, description"
+                    }
+                ],
+                "max_tokens": 1000
+            },
+            timeout=30
+        )
+        
+        if response.status_code == 200:
+            data = response.json()
+            content = data['choices'][0]['message']['content']
+            # Try to parse as JSON
+            try:
+                return json.loads(content)
+            except:
+                return {"raw_response": content}
+        else:
+            print(f"❌ Modal API error: {response.status_code} - {response.text}")
+            return None
+            
+    except Exception as e:
+        print(f"❌ Modal API exception: {e}")
+        return None
+
+def parse_ebay_listing(html_content):
+    """
+    Use Modal API to parse eBay HTML content
+    Returns structured listing data
+    """
+    token = get_modal_token()
+    if not token:
+        return None
+    
+    try:
+        response = requests.post(
+            "https://api.us-west-2.modal.direct/v1/chat/completions",
+            headers={
+                "Content-Type": "application/json",
+                "Authorization": f"Bearer {token}"
+            },
+            json={
+                "model": "zai-org/GLM-5.1-FP8",
+                "messages": [
+                    {
+                        "role": "system",
+                        "content": "You are an eBay listing parser. Extract product data from HTML. Return ONLY valid JSON."
+                    },
+                    {
+                        "role": "user",
+                        "content": f"Extract from this eBay HTML: title, price, seller, condition, image_url, listing_url\n\nHTML: {html_content[:5000]}"
+                    }
+                ],
+                "max_tokens": 500
+            },
+            timeout=30
+        )
+        
+        if response.status_code == 200:
+            data = response.json()
+            content = data['choices'][0]['message']['content']
+            try:
+                return json.loads(content)
+            except:
+                return None
+        else:
+            return None
+            
+    except Exception as e:
+        print(f"Error: {e}")
+        return None
+
+if __name__ == "__main__":
+    # Test the API
+    print("Testing Modal API...")
+    token = input("Enter your Modal API token: ")
+    save_modal_token(token)
+    
+    result = scrape_with_modal(
+        "https://www.ebay.com/sch/i.html?_nkw=griswold+skillet",
+        "Find cast iron skillet listings with prices"
+    )
+    
+    if result:
+        print(f"✅ Success: {result}")
+    else:
+        print("❌ Failed")