# Ambolt Tech Stack Lookup

> Ambolt Tech Stack Lookup is a paid API for AI agents from api.ambolt.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-11).

Detects the technologies, frameworks, and web servers used by one or more public websites by analyzing HTTP headers and page content.

## Facts

- Endpoint: GET https://api.ambolt.dev/v1/tech-stack-lookup?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ambolt-tech-stack-lookup-8c12f649
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_RZjBjdicziJjLYIj85D2I

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 ambolt-tech-stack-lookup-8c12f649
```

Example prompt: What tech stack is stripe.com running on — can you detect the web server, frameworks, and any other technologies from their public site?

## When to prefer this

Choose this endpoint when you need fast, lightweight technology fingerprinting of public websites based on HTTP headers and static page content. Ideal for competitive intelligence, lead enrichment, or pre-integration audits where you need to identify web servers, frameworks, and CDNs without full browser rendering. Supports batch lookups of up to 20 URLs per call at $0.005 USDC per call, making it cost-effective for bulk analysis.

## Known failure modes

- URL is unreachable or returns a non-200 status — entry marked with ok:false
- Private or intranet URLs that are not publicly accessible will fail to resolve
- Technologies loaded only via JavaScript execution or on secondary pages will not be detected
- Exceeding the 20-URL limit on the urls array will cause a validation error
- Malformed or non-HTTP/HTTPS URLs rejected by schema validation

## How this service works

Pay-per-call data tools for developers and AI agents: company registers, documents, tenders, rates and on-chain facts as MCP tools, x402 endpoints and Apify Actors.

## Output

Returns a JSON object with a results array where each entry includes the target URL, HTTP status, final (redirected) URL, a list of detected technologies each with name, category, evidence sources, and confidence level, plus aggregate counts of succeeded and failed checks and a timestamp. A note is included warning that client-side or lazy-loaded technologies may not be detected.

## 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": {
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "POST"
     ]
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "url": {
       "type": "string",
       "maxLength": 2000,
       "description": "One public http(s) URL or domain. Use this or urls."
      },
      "urls": {
       "type": "string",
       "description": "Up to 20 URLs or domains; each successfully checked site is one billable result."
      }
     },
     "additionalProperties": false
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "failed": 0,
  "results": [
   {
    "ok": true,
    "url": "https://www.sitemaps.org/",
    "note": "Detection reads one page and its response headers; technologies loaded only after JavaScript runs or on other pages are not seen.",
    "status": 200,
    "finalUrl": "https://www.sitemaps.org/",
    "categories": [
     "Framework",
     "Web server"
    ],
    "technologies": [
     {
      "name": "Microsoft IIS",
      "category": "Web server",
      "evidence": [
       "header server"
      ],
      "confidence": "high"
     },
     {
      "name": "ASP.NET",
      "category": "Framework",
      "evidence": [
       "header x-powered-by"
      ],
      "confidence": "high"
     }
    ]
   }
  ],
  "checkedAt": "2026-10-03T11:03:47.673Z",
  "succeeded": 1,
  "billableResults": 1
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ambolt-tech-stack-lookup-8c12f649/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.ambolt.dev](https://www.zero.xyz/host/api.ambolt.dev/llms.txt)