# Does Site Use Tailwind CSS

> Does Site Use Tailwind CSS is a paid API for AI agents from site.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-15).

Detects whether a website uses Tailwind CSS by fetching its homepage and matching Tailwind-specific fingerprints in HTML and response headers, returning a yes/no result with evidence.

## Facts

- Endpoint: GET https://site.intel.rallylive.ca/site/uses/tailwind?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/does-site-use-tailwind-css-ddf20764
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CbgrT73iYhoF4FbGR2CRY

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 does-site-use-tailwind-css-ddf20764
```

Example prompt: Can you check if stripe.com uses Tailwind CSS — I want to know if they've adopted it and see what evidence was found on their homepage?

## When to prefer this

Choose this endpoint when you need a lightweight, single-domain check for Tailwind CSS specifically. It is ideal for sales prospecting workflows, competitive technographic research, or pre-migration audits where you need a quick yes/no with evidence. For bulk checks across many domains, prefer the sibling bulk endpoint. For detecting other CSS frameworks or frontend technologies, use the corresponding technology-specific sibling endpoints.

## Known failure modes

- Domain is unreachable or returns a non-200 status — detection cannot proceed
- Site uses heavy client-side rendering and Tailwind classes are only injected via JavaScript after page load — may return false negative
- Highly customized Tailwind builds with purged class names may not match known fingerprints
- Rate limiting or bot protection on the target domain blocks the fetch
- Domain is missing or malformed in the request — returns an error

## How this service works

Does a website use Tailwind CSS? Fetches the page (homepage for a bare domain) and matches Tailwind CSS's fingerprints in the HTML and response headers, returning yes/no with the evidence snippet and the category (css). Technographics for sales, competitor research and migration planning, one technology per call. $0.01 per check.

## Output

Returns a yes/no boolean indicating whether Tailwind CSS was detected on the site, along with an evidence snippet (the matched HTML or header content that triggered the detection) and the technology category label ('css'). Useful for confirming presence or absence of Tailwind on any publicly accessible domain.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/does-site-use-tailwind-css-ddf20764/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from site.intel.rallylive.ca](https://www.zero.xyz/host/site.intel.rallylive.ca/llms.txt)