# 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 2026-10-21).

Computes the Coleman-Liau readability index score for a given text, indicating the U.S. grade level needed to comprehend it.

## Facts

- Endpoint: POST https://kihustle.tech/agents/api/v1/coleman-liau-index?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/coleman-liau-readability-index-calculator-74bc7360
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xJ8QOAxDMckVME1wv-MbE

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-74bc7360 -d '<json body>'
```

Example prompt: Can you calculate the Coleman-Liau readability index for this text: 'Artificial intelligence is transforming the way businesses operate by automating repetitive tasks and enabling faster decision-making.'?

## When to prefer this

Choose this endpoint when you specifically need the Coleman-Liau readability metric, which is based on characters-per-word and sentences-per-word (making it suitable for programmatic text analysis without syllable counting). Prefer it over Flesch-Kincaid or Gunning Fog when character-based measurement is sufficient or when working with text where syllable detection is unreliable.

## Known failure modes

- Empty or missing 'text' field returns an error response
- Extremely short texts (fewer than a few words) may produce unreliable or edge-case scores
- Non-English text may yield inaccurate grade-level estimates since the formula is calibrated for English
- Malformed JSON request body may result in a 400-level error

## 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, representing the approximate U.S. school grade level required to understand the input text. Higher scores indicate more complex 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-74bc7360/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)