# PrimeAPI Text Readability Analyzer

> PrimeAPI Text Readability Analyzer is a paid API for AI agents from prime-api-seven.vercel.app, paid per call via x402, $0.197271/call, status unknown (last checked 2026-09-15).

Analyzes the readability of a given text, returning readability scores and metrics to assess how easy the content is to understand.

## Facts

- Endpoint: POST https://prime-api-seven.vercel.app/api/tools/text/readability
- Price: $0.197271/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/primeapi-text-readability-analyzer-8a04c338
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bJMEf44nzbYAxr3raPWmo

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 primeapi-text-readability-analyzer-8a04c338 -d '<json body>'
```

Example prompt: Can you check the readability of this paragraph and tell me the reading grade level and how easy it is to understand: 'The mitochondria is the powerhouse of the cell, facilitating ATP synthesis through oxidative phosphorylation within the inner mitochondrial membrane.'

## When to prefer this

Use this endpoint when you need a quick, pay-per-call readability score for arbitrary text without setting up API keys or subscriptions. Ideal for agents checking content quality, writing level, or audience accessibility on demand. Prefer this over full NLP pipelines when only readability metrics are needed.

## Known failure modes

- Empty or missing query input returns an error
- Extremely short text may produce unreliable scores
- Very long text may be truncated or timed out
- Non-English text may produce inaccurate or unsupported results
- Payment failure in USDC/x402 prevents endpoint access

## How this service works

Crypto, AI, Social Media, Finance, Weather, Tools &amp; more. Pay per call in USDC on Base. No API keys.

## Output

Returns readability scores and metrics for the submitted text, likely including standard measures such as Flesch Reading Ease, Flesch-Kincaid grade level, or similar indices indicating how easy the text is to read and at what educational level it targets.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "query": {
   "type": "string",
   "description": "Search query or input parameter"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "description": "API response data"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/primeapi-text-readability-analyzer-8a04c338/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from prime-api-seven.vercel.app](https://www.zero.xyz/host/prime-api-seven.vercel.app/llms.txt)