# WebberSites Alt-Text Audit

> WebberSites Alt-Text Audit is a paid API for AI agents from api.webbersites.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Audits any public webpage for image accessibility issues including missing alt attributes, filename-as-alt, generic/over-long alt text, unlabeled SVGs, image-map areas, and image inputs without alternatives.

## Facts

- Endpoint: GET https://api.webbersites.com/api/seo/alt-check
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/webbersites-alt-text-audit-3cecbc8b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jl3NNoCDPFoLJ2HXlCj5z

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 webbersites-alt-text-audit-3cecbc8b
```

Example prompt: Can you audit https://example.com/about for alt text issues — I want to know which images are missing alt attributes, which have generic or filename-based alt text, and how many are decorative?

## When to prefer this

Choose this endpoint when you specifically need image alt-text and accessibility metadata for a webpage, including nuanced checks for generic alt text, filenames used as alt, over-long descriptions, SVG roles, and image-map areas. Prefer over generic WCAG checkers when image accessibility is the primary concern, or when you need granular alt-text quality signals for SEO reporting.

## Known failure modes

- URL is not publicly accessible or returns non-200 status — audit cannot be performed
- Page has no images — returns zeroed counts with empty issues array
- Malformed or non-HTTP URL input — returns validation error
- Page behind authentication or bot-blocking — content not retrievable
- Very large pages may time out or return partial results

## How this service works

Alt-text audit for any page: finds images with missing alt attributes, flags filename-as-alt and generic alt text, over-long alt, unlabeled svg[role=img], image-map areas and image inputs without alternatives. Counts decorative alt="" separately. For SEO and accessibility agents.

## Output

Returns a structured report with total image count, count of images missing alt attributes, count of low-quality alt text (generic, filename-based, or over-long), a list of specific issues with details, and a separate count of decorative images using alt="".

## 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",
     "required": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string",
       "description": "Public URL of the page to audit"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "issues": {
       "type": "array"
      },
      "missing_alt": {
       "type": "number"
      },
      "images_total": {
       "type": "number"
      },
      "low_quality_alt": {
       "type": "number"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "url": "https://example.com",
  "issues": [
   {
    "src": "/hero.jpg",
    "tag": "img",
    "issue": "missing_alt"
   }
  ],
  "missing_alt": 6,
  "images_total": 24,
  "with_good_alt": 15,
  "low_quality_alt": 1,
  "empty_alt_decorative": 2
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/webbersites-alt-text-audit-3cecbc8b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.webbersites.com](https://www.zero.xyz/host/api.webbersites.com/llms.txt)