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CompanyFacts Tech Stack Detector
x402
CompanyFacts Tech Stack Detector is a paid API for AI agents from companyfacts.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-31).
Detects and identifies the technologies, CDN providers, and infrastructure used by any given website URL.
Price / call$0.003
Success—
StatusUnknown
How this service works
Open job postings read first-hand from the applicant-tracking system behind a company's careers page: Greenhouse, Ashby, Lever or Workable. Includes a directory of 8532 company job boards, because none of the vendors publishes one. Salaries are parsed into numbers where the employer publishes them and refused where ambiguous. No personal data.
Output
A JSON object containing the input domain, final resolved URL, HTTP status, fetch status, detected technologies (each with name, version, evidence sources, categories, and confidence score), CDN providers, MX hosts, and total technology count.
Example use cases
Competitor tech stack research
“Can you figure out what technologies stripe.com is built on? I want to know their CDN, email infrastructure, and any frontend frameworks you can detect.”
Sales lead qualification by stack
“Check what CRM and marketing tools are running on hubspot.com — I need to know if they're using any Salesforce products before our sales call.”
Security audit infrastructure check
“Scan example-startup.com and tell me what CDN, hosting provider, and MX hosts they're using — I need a full technology fingerprint for our security review.”
Technical details
Endpoint
GEThttps://companyfacts.dev/x402/v1/tech-stack?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need authoritative, real-time technology fingerprinting of a specific domain from a structured, paid API rather than relying on scraped or crowdsourced databases like BuiltWith or Wappalyzer browser extensions. Ideal for agent workflows requiring programmatic, reliable tech stack data with confidence scoring and MX host detection in a single call.
Side effects
- URL is unreachable or returns a non-200 status — fetch_status will indicate failure
- Domain does not exist or DNS resolution fails — status field reflects the error
- Website uses heavy obfuscation or anti-bot measures reducing detection accuracy
- min_confidence parameter filters out all results if set too high
- Invalid URL format causes request rejection
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"cdn": [
"Cloudflare"
],
"input": "shopify.com",
"domain": "shopify.com",
"status": 200,
"mx_hosts": [
"aspmx.l.google.com"
],
"final_url": "https://www.shopify.com/",
"fetch_status": "ok",
"technologies": [
{
"name": "Cloudflare",
"version": null,
"evidence": [
"headers"
],
"categories": [
"CDN"
],
"confidence": 100
}
],
"technology_count": 1
}
}Tags
x402
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