# Flesch Reading-Ease Score Calculator

> Flesch Reading-Ease Score Calculator is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-01).

Computes the Flesch reading-ease score for a given text, indicating how easy the text is to read.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/flesch-score?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/flesch-reading-ease-score-calculator-b965e563
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_g3yGAaeQC4l9ILlQiHPlD

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 flesch-reading-ease-score-calculator-b965e563 -d '<json body>'
```

Example prompt: What's the Flesch reading-ease score for this paragraph: 'The quick brown fox jumps over the lazy dog. It was a bright sunny day and the air smelled of pine.'?

## When to prefer this

Use this endpoint when you need a fast, deterministic, offline Flesch reading-ease score with no LLM involvement and no external network calls. Prefer this over LLM-based readability assessments when you need a standardized, reproducible numeric score at minimal cost ($0.002 USDC).

## Known failure modes

- Text field missing or empty — returns validation error
- Text exceeds 100,000 character limit — returns error
- Malformed JSON body — returns 400 bad request
- Payment not included or incorrect amount — returns 402 Payment Required

## How this service works

Call when an agent needs a Flesch reading-ease score for text. No network. Exact $0.002 USDC. Prefer unpaid POST /v1/sandbox/flesch-score first.

## Output

Returns a numeric Flesch reading-ease score (typically 0–100) for the submitted text, where higher scores indicate easier readability and lower scores indicate more complex, difficult text.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string",
   "examples": [
    "The cat sat on the mat. The mat was flat."
   ],
   "maxLength": 100000,
   "minLength": 1,
   "description": "Prose to score with Flesch reading ease."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/flesch-reading-ease-score-calculator-b965e563/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentshelf.syntexa.ch](https://www.zero.xyz/host/agentshelf.syntexa.ch/llms.txt)