# Image Alt Attribute Auditor (`junipr/image-alt-attribute-auditor`) Actor

Audit image alt attributes, lazy image candidates, duplicate alt text, and filename-like image metadata.

- **URL**: https://apify.com/junipr/image-alt-attribute-auditor.md
- **Developed by:** [junipr](https://apify.com/junipr) (community)
- **Categories:** SEO tools
- **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet

## Pricing

from $4.90 / 1,000 image alt attribute auditor page auditeds

This Actor is paid per event. You are not charged for the Apify platform usage, but only a fixed price for specific events.

Learn more: https://docs.apify.com/platform/actors/running/actors-in-store#pay-per-event

## What's an Apify Actor?

Actors are web data automations that power AI and operations. They run on the Apify platform to scrape websites, process data, connect APIs, and automate workflows.
In Batch mode, an Actor accepts a well-defined JSON input, performs an action which can take anything from a few seconds to a few hours,
and optionally produces a well-defined JSON output, datasets with results, or files in key-value store.
In Standby mode, an Actor provides a web server which can be used as a website, API, or an MCP server.
Actors are written with capital "A".

## How to integrate an Actor?

If asked about integration, you help developers integrate Actors into their projects.
You adapt to their stack and deliver integrations that are safe, well-documented, and production-ready.
The best way to integrate Actors is as follows.

- **AI agents and MCP clients** — the [Apify MCP server](https://docs.apify.com/integrations/mcp.md) at `https://mcp.apify.com` (remote, streamable HTTP, OAuth on first use).
- **Agentic workflows and local Actor development** — [Agent Skills](https://apify.com/.well-known/agent-skills/index.json) with the [Apify CLI](https://docs.apify.com/cli/docs.md): `npm install -g apify-cli`, then `apify login`.
- **JavaScript/TypeScript projects** — the official [JS/TS client](https://docs.apify.com/api/client/js/docs.md): `npm install apify-client`.
- **Python projects** — the official [Python client](https://docs.apify.com/api/client/python/docs.md): `pip install apify-client`.
- **Any other language** — the [REST API](https://docs.apify.com/api/v2.md).

For usage examples, see the [API](#api) section below.

For more details, see Apify documentation as [Markdown index](https://docs.apify.com/llms.txt) and [Markdown full-text](https://docs.apify.com/llms-full.txt).

# README

## Image Alt Attribute Auditor

### Store Positioning

**Store title:** Image Alt Attribute Auditor

**Short description:** Audit image alt attributes, lazy image candidates, duplicate alt text, and filename-like image metadata.

**SEO title:** Image Alt Attribute Auditor — technical SEO, web, and domain audit

**SEO description:** Audit image alt attributes, lazy image candidates, duplicate alt text, and filename-like image metadata. Use it to find crawlability, indexability, security, metadata, and page-quality issues with evidence-backed rows and audit reports.

**Categories:** SEO\_TOOLS

**Keywords:** image, alt, attribute, auditor, data qa, web/domain audit

### Fixed-Inclusive PPE Pricing

This actor uses pay-per-event pricing. Event prices include Apify platform usage; users are not expected to pay a separate platform-usage pass-through charge for the configured pricing model.

- Tier: W1 — Web/domain audit
- Primary event: `page-audited` at $0.00490 base
- Default max charge: $10.00
- Store discounts: FREE/BRONZE base, SILVER discounted, GOLD deepest approved discount

Event set:

- `actor-start`: base $0.00500, GOLD $0.00400. Image Alt Attribute Auditor: charged when actor start is completed. The price includes Apify platform usage; no separate usage pass-through is intended.
- `page-audited`: base $0.00490, GOLD $0.00392. Image Alt Attribute Auditor: charged when page audited is completed. The price includes Apify platform usage; no separate usage pass-through is intended.
- `record-extracted`: base $0.00372, GOLD $0.00298. Image Alt Attribute Auditor: charged when record extracted is completed. The price includes Apify platform usage; no separate usage pass-through is intended.
- `finding-emitted`: base $0.00372, GOLD $0.00298. Image Alt Attribute Auditor: charged when finding emitted is completed. The price includes Apify platform usage; no separate usage pass-through is intended.
- `audit-report-generated`: base $0.05000, GOLD $0.04000. Image Alt Attribute Auditor: charged when audit report generated is completed. The price includes Apify platform usage; no separate usage pass-through is intended.

### Public Task Concepts

- Audit Image Alt Attribute controls on a capped public sample
- Find high-priority Image Alt Attribute issues before release
- Validate Image Alt Attribute evidence from supplied pages
- Prioritize Image Alt Attribute fixes with severity and proof
- Export Image Alt Attribute QA rows for client review

Audit image alt attributes, lazy image candidates, duplicate alt text, and filename-like image metadata.

This actor supports real URL fetching, sitemap discovery, and offline supplied HTML/text paths where advertised by the locked spec. It writes dataset rows and key-value store report artifacts.

### Inputs

- `startUrls`
- `sitemapUrls`
- `htmlInputs`
- `allowedDomains`
- `maxPages`
- `maxDepth`
- `includeLazyLoadedImages`
- `includeSrcsetCandidates`
- `detectFilenameAlt`
- `detectDuplicateAlt`
- `altMaxLength`
- `includeContext`
- `requestDelayMs`
- `timeoutMs`

### Dataset fields

- `sourceUrl`
- `pageTitle`
- `imageUrl`
- `normalizedImageUrl`
- `altText`
- `altLength`
- `titleText`
- `width`
- `height`
- `loadingMode`
- `inLink`
- `linkTarget`
- `contextSnippet`
- `issueCode`
- `severity`
- `recommendation`
- `evidenceSnippet`

### Local validation

Run `npm test` for exact-value analyzer tests and `npm run check` for JavaScript syntax validation.

### Billing and cost controls

This actor uses fixed-inclusive pay-per-event pricing. It charges `actor-start`, then `page-audited` before each dataset row, and `audit-report-generated` before report artifacts. `maxChargeUsd` is enforced locally and in Apify runs; uncharged rows and reports are withheld. Platform usage pass-through remains off.

# Actor input Schema

## `startUrls` (type: `array`):

Public page URLs to fetch and audit. Keep runs bounded with maxPages and allowedDomains.

## `sitemapUrls` (type: `array`):

XML sitemap URLs whose listed pages should be sampled for this audit.

## `htmlInputs` (type: `array`):

Inline HTML documents to audit without fetching live pages.

## `allowedDomains` (type: `array`):

Optional hostname allowlist used to keep crawls constrained to approved domains.

## `maxPages` (type: `integer`):

Maximum number of pages or records to process in one run.

## `maxDepth` (type: `integer`):

Maximum crawl depth from supplied start URLs.

## `includeLazyLoadedImages` (type: `boolean`):

Inspect lazy-loaded image attributes such as data-src and loading.

## `includeSrcsetCandidates` (type: `boolean`):

Include srcset candidate URLs when auditing image alternatives.

## `detectFilenameAlt` (type: `boolean`):

Flag alt text that appears to be copied from an image filename.

## `detectDuplicateAlt` (type: `boolean`):

Flag repeated alt text across multiple images.

## `altMaxLength` (type: `integer`):

Maximum recommended alt text length before a warning is emitted. Use 0 to disable.

## `includeContext` (type: `boolean`):

Include nearby text or element context to make findings easier to review.

## `requestDelayMs` (type: `integer`):

Delay in milliseconds between live page fetches.

## `timeoutMs` (type: `integer`):

Per-request timeout in milliseconds for live fetches.

## `maxChargeUsd` (type: `number`):

Stop before paid output would exceed this fixed-inclusive PPE limit.

## Actor input object example

```json
{
  "startUrls": [],
  "sitemapUrls": [],
  "htmlInputs": [],
  "allowedDomains": [],
  "maxPages": 25,
  "maxDepth": 1,
  "includeLazyLoadedImages": true,
  "includeSrcsetCandidates": true,
  "detectFilenameAlt": true,
  "detectDuplicateAlt": true,
  "altMaxLength": 0,
  "includeContext": true,
  "requestDelayMs": 0,
  "timeoutMs": 15000,
  "maxChargeUsd": 10
}
```

# Actor output Schema

## `dataset` (type: `string`):

No description

## `report` (type: `string`):

No description

# API

You can run this Actor programmatically using our API. Below are code examples in JavaScript, Python, and CLI, as well as the OpenAPI specification and MCP server setup.

## JavaScript example

```javascript
import { ApifyClient } from 'apify-client';

// Initialize the ApifyClient with your Apify API token
// Replace the '<YOUR_API_TOKEN>' with your token
const client = new ApifyClient({
    token: '<YOUR_API_TOKEN>',
});

// Prepare Actor input
const input = {};

// Run the Actor and wait for it to finish
const run = await client.actor("junipr/image-alt-attribute-auditor").call(input);

// Fetch and print Actor results from the run's dataset (if any)
console.log('Results from dataset');
console.log(`💾 Check your data here: https://console.apify.com/storage/datasets/${run.defaultDatasetId}`);
const { items } = await client.dataset(run.defaultDatasetId).listItems();
items.forEach((item) => {
    console.dir(item);
});

// 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/js/docs

```

## Python example

```python
from apify_client import ApifyClient

# Initialize the ApifyClient with your Apify API token
# Replace '<YOUR_API_TOKEN>' with your token.
client = ApifyClient("<YOUR_API_TOKEN>")

# Prepare the Actor input
run_input = {}

# Run the Actor and wait for it to finish
run = client.actor("junipr/image-alt-attribute-auditor").call(run_input=run_input)

# Fetch and print Actor results from the run's dataset (if there are any)
print(f"💾 Check your data here: https://console.apify.com/storage/datasets/{run.default_dataset_id}")
for item in client.dataset(run.default_dataset_id).iterate_items():
    print(item)

# 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/python/docs/quick-start

```

## CLI example

```bash
echo '{}' |
apify call junipr/image-alt-attribute-auditor --silent --output-dataset

```

## MCP server setup

```json
{
    "mcpServers": {
        "apify": {
            "type": "http",
            "url": "https://mcp.apify.com/?tools=fetch-actor-details,junipr/image-alt-attribute-auditor"
        }
    }
}

```

The hosted server signs you in with OAuth on first connect, so no API token belongs in this config. Clients without OAuth support can send an `Authorization: Bearer <APIFY_API_TOKEN>` header instead, using a token from API & Integrations in Apify Console (https://console.apify.com/settings/integrations).

## OpenAPI specification

Download the OpenAPI definition: https://api.apify.com/v2/actors/uTcmLFYrjIr5IxyrH/builds/VO63SqJMZo4ZUOGeT/openapi.json