# Readability Score Analyzer

> Readability Score Analyzer is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Analyzes a webpage's text for readability metrics including Flesch Reading Ease, Flesch-Kincaid grade level, sentence/word/syllable counts, difficulty label, and estimated reading time.

## Facts

- Endpoint: GET https://intel.rallylive.ca/site/readability
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/readability-score-analyzer-aecfdfcb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_L3l7vQj9vaIFaaVPwXMey

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 readability-score-analyzer-aecfdfcb
```

Example prompt: Can you check the readability of https://example.com/blog/how-to-invest and tell me the Flesch Reading Ease score, grade level, and whether it's suitable for a general adult audience?

## When to prefer this

Choose this endpoint when you need structured, quantitative readability metrics (Flesch scores, grade levels, syllable counts) for a live webpage URL rather than raw text you already have. Ideal for content audits, editorial QA pipelines, SEO tooling, or audience-fit checks at scale. Prefer this over manual text-paste tools when automating analysis across multiple URLs at $0.01 per call.

## Known failure modes

- URL is unreachable or returns non-200 status — endpoint may return an error or empty result
- Page has no extractable text content (e.g. pure image or JavaScript-rendered SPA without SSR)
- URL points to a binary file (PDF, image) rather than an HTML page
- Rate limiting or payment failure if USDC payment is not correctly handled via x402 protocol

## How this service works

Readability of a page's text: Flesch Reading Ease, Flesch-Kincaid grade level, average sentence length, syllables, word and sentence counts, difficulty label and reading time. Content quality and audience-fit checks. $0.01 per page.

## Output

Returns Flesch Reading Ease score, Flesch-Kincaid grade level, average sentence length, syllable count, total word count, total sentence count, a human-readable difficulty label (e.g. 'Easy', 'Difficult'), and an estimated reading time for the analyzed page.

## 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/readability-score-analyzer-aecfdfcb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from intel.rallylive.ca](https://www.zero.xyz/host/intel.rallylive.ca/llms.txt)