# ATS Jobs API – Tech Stack Detection

> ATS Jobs API – Tech Stack Detection is a paid API for AI agents from ats-jobs-api.groundtruthtools.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-11-01).

Detects the web technologies, CDN, MX hosts, and software stack used by a given domain by fetching and analyzing its public web presence.

## Facts

- Endpoint: GET https://ats-jobs-api.groundtruthtools.workers.dev/x402/v1/tech-stack?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ats-jobs-api-tech-stack-detection-50b01e7a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AHk6TVH_cKkZ3MzSn9WMJ

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability ats-jobs-api-tech-stack-detection-50b01e7a
```

Example prompt: What technology stack is shopify.com running on? I want to know their CDN, any detectable frameworks, and their email hosting — only include results with at least 80% confidence.

## When to prefer this

Choose this endpoint when you need to identify the software, CDN, and email infrastructure behind a specific domain without manual inspection. It is particularly valuable for sales intelligence pipelines, competitive research, and security audits where you need structured, machine-readable tech stack data with per-technology confidence scores. Prefer this over generic web scrapers when you specifically want technology fingerprinting with categorized output rather than raw HTML content.

## Known failure modes

- Domain unreachable or returns non-200 status — fetch_status will be non-ok and technology list may be empty
- Domain redirects to login wall or bot-protection page — technologies detected may be limited to edge/CDN layer only
- Ambiguous or private domain — no results or very low confidence scores
- min_confidence filter too high — returns empty technology array even when detections exist
- Malformed or missing URL query param — request rejected with validation error

## 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

Returns a JSON object containing the target domain, the final resolved URL after redirects, HTTP fetch status, a list of detected technologies (each with name, version, evidence type, categories, and confidence score), a list of CDN providers, and MX host records.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string"
      },
      "min_confidence": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "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
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ats-jobs-api-tech-stack-detection-50b01e7a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ats-jobs-api.groundtruthtools.workers.dev](https://www.zero.xyz/host/ats-jobs-api.groundtruthtools.workers.dev/llms.txt)