# Readability Score Checker

> Readability Score Checker is a paid API for AI agents from x402.forgemesh.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).

Computes Flesch reading-ease score, average sentence length, estimated reading time, and basic text statistics (character, word, sentence counts) for a block of text.

## Facts

- Endpoint: POST https://x402.forgemesh.io/readability-score-checker
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/readability-score-checker-596beb22
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QaC3op7mJBWfJOTTGUZ23

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-checker-596beb22 -d '<json body>'
```

Example prompt: Check the readability of this paragraph for me — I need the Flesch reading-ease score, estimated reading time, and sentence stats to make sure it's accessible before we publish: 'Good writing is clear and direct. Short sentences help readers follow along. Avoid jargon wherever possible.'

## When to prefer this

Use this endpoint when you need quantitative readability metrics — especially the Flesch reading-ease score and reading time — for content QA gates, editorial workflows, or publishing automation that requires text to meet a minimum readability threshold before going live.

## Known failure modes

- Empty or missing 'text' field returns an error
- Extremely short text (single word or no sentences) may yield unreliable or zero-value metrics
- Very large text payloads may exceed request size limits
- Non-English text may produce inaccurate Flesch scores since the formula is calibrated for English

## How this service works

Computes a Flesch reading-ease score, average sentence length, and estimated reading time for any block of text, alongside character, word, and sentence counts. For content QA gates, editorial tooling, and agents that need to confirm text hits a target readability level before publishing.

## Output

Returns a Flesch reading-ease score (numeric), average sentence length, estimated reading time, and counts of characters, words, and sentences for the submitted text.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "words": 13,
  "sentences": 2,
  "flesch_reading_ease": 97,
  "estimated_llm_tokens": 16
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/readability-score-checker-596beb22/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.forgemesh.io](https://www.zero.xyz/host/x402.forgemesh.io/llms.txt)