The web-stack signal engine
From lookup to export in minutes. Built for speed, built for operators.
Lookup
Instant technology detection
Enter a domain. Get detected technologies, signals, and evidence. Instant results.
- 5,000+ technologies detected
- Evidence-backed detection
- 50 free lookups/month
Example: shopify.com
Shopify E-commerce
React JavaScript Framework
Cloudflare CDN
Segments
Save and reuse lead definitions
Define once, run forever. Create segments like "Shopify stores with 1k+ products and no Klaviyo."
- Technology + signal filters
- "Missing tool" segments
- Preview before export
My Segments
Shopify + No Klaviyo
12,847 matches • Updated 2h ago
WooCommerce + High Traffic
8,234 matches • Updated 5h ago
New Meta Pixel Installs
3,456 matches • Updated 1d ago
Feeds
Track what changed
Know when sites add or remove technologies. Fresh monthly. Queryable forever.
- New installs
- Migrations detected
- Catalog growth signals
Recent Changes
+Klaviyo
store.example.com
−Mailchimp
shop.brand.com
Shopify → WooCommerce
mystore.io
Exports
Take your data anywhere
Excel, CSV and Parquet. On-demand or scheduled. Direct to your pipeline.
- CSV for spreadsheets
- Scheduled drops (Pro)
- Parquet for data warehouses (Enterprise)
# export_20240115.csv
domain,platform,missing_tool,products,traffic
shop1.com,Shopify,Klaviyo,2847,High
store2.io,Shopify,Klaviyo,1523,Medium
brand3.co,Shopify,Klaviyo,892,High
API + MCP
Programmable access
Integrate into Clay, n8n, Zapier, or internal pipelines. MCP makes it agent-native.
- RESTful API
- MCP for AI agents
- <1s response time
"Bring what-stack into your agent."
# API Example
curl
-X GET \"https://api.what-stack.com/v1/lookup" \
-H "Authorization: Bearer $API_KEY" \
-d '{"domain": "example.com"}'