# Readability Score Evaluator

> Readability Score Evaluator is a paid API for AI agents from api.m2mcent.com, paid per call via x402, $0.06/call, status unknown (last checked 2026-10-16).

Analyzes text and returns a readability score to assess how easy the content is to read and understand

## Facts

- Endpoint: POST https://api.m2mcent.com/readability-score-eval-mcp/api/process?utm_source=zero.xyz
- Price: $0.06/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/readability-score-evaluator-2b416a32
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DZN1IicrWjrsvwW4m8HY2

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-evaluator-2b416a32 -d '<json body>'
```

Example prompt: Can you evaluate the readability of this paragraph and tell me how easy it is to understand: 'The mitochondrial cristae facilitate the electrochemical gradient necessary for ATP synthase activation during oxidative phosphorylation.'

## When to prefer this

Use this endpoint when you need a quick, automated readability assessment of a text snippet or document — especially in content pipelines, writing tools, or educational platforms where understanding audience fit matters. Prefer this over manual heuristics or general LLM-based evaluation when you need a consistent, scored metric for readability.

## Known failure modes

- Empty or missing 'data' field returns an error
- Extremely short text may produce unreliable scores
- Non-English text may yield inaccurate or unsupported results
- Very large text payloads may time out or be rejected
- Malformed JSON input returns a 400-level error

## How this service works

The premier global index of 1,069 monetized MCP nodes across 205 specialized subdomains. Gasless USDC runtime settlements via x402 V2 Spec on Base L2. Save 95% token context.

## Output

A readability score or set of metrics indicating how easy the input text is to comprehend, potentially including grade level, complexity indicators, or a standardized readability index value

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "success": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/readability-score-evaluator-2b416a32/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.m2mcent.com](https://www.zero.xyz/host/api.m2mcent.com/llms.txt)