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Tech Detect — Technology Stack Detection via x402
x402
Tech Detect — Technology Stack Detection via x402 is a paid API for AI agents from stack.halowerk.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-09).
Detects the technology stack used by a given domain, returning identified technologies with confidence scores and evidence, paid per call in USDC over x402.
Price / call$0.004
Success—
StatusUnknown
How this service works
Domain in, technology stack out. Confidence and evidence for every hit. Pay per call in USDC over x402. No signup, no API key.
Output
Returns a list of detected technologies for the target domain, each with a name, category (e.g. CMS, analytics, CDN), version (if detectable), confidence score, and supporting evidence. The optional 'previous' input allows delta comparison to highlight newly added or removed technologies.
Example use cases
Competitor tech stack reconnaissance
“What technologies is my competitor acme.com using? I want to know their frontend framework, CMS, analytics tools, and any marketing automation platforms like Klaviyo or HubSpot.”
Sales prospecting enrichment
“I'm building a leads list — can you check which of these prospect domains are using Salesforce, HubSpot, or Marketo so I can tailor my outreach? Start with stripe.com.”
Monitoring stack changes over time
“Last week you told me that notion.so was using Segment and Intercom. Can you re-scan notion.so now and tell me if anything in their tech stack has changed since then?”
Technical details
Endpoint
POSThttps://stack.halowerk.com/stack/articles/klaviyo?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need structured, per-technology confidence scores and evidence for a specific domain without signing up for a service or managing API keys. Particularly useful for pay-as-you-go competitive intelligence pipelines, sales enrichment workflows, or monitoring stack drift over time using the 'previous' delta input. Prefer this over browser-extension-style tools when you need programmatic, agent-callable detection integrated into an automated workflow.
Side effects
- Domain is unreachable or returns non-200 responses — detection may be incomplete or fail entirely
- URL input is malformed or exceeds 2048 characters — validation error returned
- No technologies detected if the site uses heavy obfuscation or server-side rendering without fingerprints
- Payment failure over x402 prevents the call from completing
- Rate limits or infrastructure timeouts on the target domain may degrade results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | |
| previous | object |
Tags
x402
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