# Text Readability Analyzer

> Text Readability Analyzer is a paid API for AI agents from api.x402node.dev, paid per call via x402, $0.0022/call, status unknown (last checked 2026-09-14).

Analyzes text and returns multiple readability metrics including Flesch reading ease score, grade level, syllable count, and sentence count

## Facts

- Endpoint: GET https://api.x402node.dev/text/readability
- Price: $0.0022/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-x402node-dev-b83a0515
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_p-xxpKlWS22-xm3ESBJwC

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 api-x402node-dev-b83a0515
```

Example prompt: Can you analyze the readability of this paragraph and tell me the Flesch reading ease score and grade level? 'The mitochondria are organelles found in eukaryotic cells that generate most of the cell's supply of adenosine triphosphate, used as a source of chemical energy.'

## When to prefer this

Use this endpoint when you need quantitative readability metrics for a piece of text — especially Flesch reading ease, grade level, or syllable/sentence statistics. Ideal for content optimization pipelines, accessibility audits, education-level targeting, and writing assistants that need to recommend simplification. Prefer this over sentiment or NLP classification endpoints when the goal is specifically measuring how easy or hard text is to read.

## Known failure modes

- Empty or missing text body returns validation error
- Text too short to compute meaningful statistics (single word or fragment)
- Non-UTF-8 or malformed payload returns parse error
- Extremely long text may hit payload size limits

## How this service works

readability score, text readability, Flesch reading ease, reading grade level, reading level, text difficulty, reading age, readability index, text complexity, readability analysis, reading grade, reading ease, text level. Analyze text readability with multiple metrics including reading ease, grade level, syllable and sentence counts. For AI agents content optimization, education tools, writing assistants, accessibility checks. Accepts payment on Base or Solana — either network works.

## Output

Returns multiple readability metrics for the submitted text including Flesch reading ease score (0-100 scale), reading grade level (e.g. 8th grade), reading age, syllable count, sentence count, word count, and a text complexity or difficulty classification.

## Example request

```json
{
 "text": "The quick brown fox jumps over the lazy dog. This is a simple sentence. Readability metrics help us understand text complexity. These tools are essential for writers and educators."
}
```

## 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": [
      "text"
     ],
     "properties": {
      "text": {
       "type": "string",
       "description": "Input text (required)"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-x402node-dev-b83a0515/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.x402node.dev](https://www.zero.xyz/host/api.x402node.dev/llms.txt)