# Tech Stack Change Detector

> Tech Stack Change Detector is a paid API for AI agents from api.timzinin.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Detects which technologies have been added or removed from a website's tech stack compared to a previously known state

## Facts

- Endpoint: POST https://api.timzinin.com/api/tech-stack-change-detector
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tech-stack-change-detector-fd6a007f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8GySsJ9JpqExDqZW3eE3A

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 tech-stack-change-detector-fd6a007f -d '<json body>'
```

Example prompt: Check if gymshark.com has changed its tech stack since they were on WordPress — tell me what they've added or dropped.

## When to prefer this

Use this endpoint when you need to compare a domain's current technology fingerprint against a known previous state and get a structured diff of added/removed tools. It is ideal for sales intelligence workflows (detecting when prospects switch platforms), competitive monitoring, and migration verification. Prefer this over a generic tech stack lookup when the delta (what changed) is the primary signal you need, not just the current state.

## Known failure modes

- Domain is unreachable or returns non-200 HTTP status — httpStatus field reflects this, found may be false
- Invalid domain format causes request rejection
- Previous stack not provided correctly — diff results may be empty or misleading
- Website uses heavy client-side rendering making tech detection incomplete
- Rate limiting or payment settlement failure returns error before scan runs

## How this service works

Pay-per-call data & tool APIs

## Output

Returns a JSON object with the current list of detected technologies, a stack hash, a list of added technologies (compared to the provided previous stack), a list of removed technologies, the HTTP status of the scraped domain, a timestamp of when the check ran, and run metadata including execution time and settlement status.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "items": {
   "type": "array",
   "maxItems": 100
  },
  "maxConcurrency": {
   "type": "integer",
   "maximum": 50,
   "minimum": 1
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "meta": {
   "run_ms": 1200,
   "settled": true,
   "item_count": 1
  },
  "results": [
   {
    "added": [
     "Shopify",
     "Zendesk",
     "Cloudflare"
    ],
    "found": true,
    "input": "gymshark.com|WordPress",
    "domain": "us.checkout.gymshark.com",
    "removed": [
     "WordPress"
    ],
    "checkedAt": "2026-07-26T13:23:09.900Z",
    "stackHash": "Cloudflare|Shopify|Zendesk",
    "httpStatus": 200,
    "technologies": [
     "Shopify",
     "Zendesk",
     "Cloudflare"
    ],
    "previousStack": [
     "WordPress"
    ]
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tech-stack-change-detector-fd6a007f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.timzinin.com](https://www.zero.xyz/host/api.timzinin.com/llms.txt)