# Coleman-Liau Readability Index Calculator

> Coleman-Liau Readability Index Calculator is a paid API for AI agents from kihustle.tech, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-20).

Computes the Coleman-Liau readability index score for a given text to estimate the US grade level required to understand it.

## Facts

- Endpoint: POST https://kihustle.tech/bot-bazaar/api/v1/coleman-liau-index?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/coleman-liau-readability-index-calculator-4bb4d3bd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Kh-jAxaVkhLaXqrNtuzLS

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 coleman-liau-readability-index-calculator-4bb4d3bd -d '<json body>'
```

Example prompt: Can you calculate the Coleman-Liau readability index for this paragraph: 'Artificial intelligence is rapidly transforming the way businesses operate, enabling automation of complex tasks and generating new revenue streams for entrepreneurs worldwide.'?

## When to prefer this

Choose this endpoint when you specifically need the Coleman-Liau readability index — which is based on characters per word and sentences per word rather than syllables — making it more reliable for programmatic text analysis. Prefer it over Flesch-Kincaid or Gunning Fog endpoints when syllable counting is impractical or when you want a character-based grade-level formula. Best suited for short-to-medium text snippets in a single API call at very low cost ($0.002 USDC).

## Known failure modes

- Empty or missing 'text' field returns an error or unexpected result
- Extremely short text (fewer than a few words) may produce unreliable or out-of-range scores
- Non-Latin or heavily punctuated text may skew character and word counts, reducing accuracy
- Network timeout or payment failure (x402) prevents the API call from completing
- Response schema is minimal and may not include detailed breakdown of letters/words/sentences used in the computation

## How this service works

Kostenlose Guides, Solo-Playbooks und Artikel zu KI, Automation und Side Hustles — für Menschen, die mit echten Systemen online Einkommen aufbauen wollen. Transparent finanziert über faire Affiliate-Links.

## Output

Returns a JSON object containing the computed Coleman-Liau index value (a numerical grade level) and a success status. The index is a floating-point number representing the approximate US school grade level a reader would need to comfortably understand the input text.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": "processed",
  "status": "success"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/coleman-liau-readability-index-calculator-4bb4d3bd/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from kihustle.tech](https://www.zero.xyz/host/kihustle.tech/llms.txt)