# 24K Labs Grammar Fix

> 24K Labs Grammar Fix is a paid API for AI agents from api.24klabs.ai, paid per call via x402, $0.006/call, status unknown (last checked 2026-09-14).

Corrects grammar, spelling, and punctuation in text while preserving the author's original voice and meaning.

## Facts

- Endpoint: POST https://api.24klabs.ai/api/v1/grammar-fix
- Price: $0.006/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/24k-labs-grammar-fix-58d43f4f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bfIn3ot8rzZfk4FaYZ8w_

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 24k-labs-grammar-fix-58d43f4f -d '<json body>'
```

Example prompt: Can you fix the grammar, spelling, and punctuation in this paragraph — keep my tone and style intact: 'Their going to the store but we wasnt sure if they're bringing there own bags or not.'

## When to prefer this

Choose this endpoint when you need lightweight, fast grammar and spelling correction that respects the author's voice — ideal for agent workflows that generate or collect user text and need to clean it up before display or publication. Prefer it over general LLM prompting when you want a consistent, pay-per-call proofreading step without managing a full LLM context.

## Known failure modes

- Empty or missing text input returns an error
- Extremely long text may be rejected if it exceeds token/character limits
- Non-text binary content cannot be processed
- API key or payment authentication failure returns 402 or 401
- Rate limit exceeded returns 429

## How this service works

Correct grammar, spelling, and punctuation while preserving voice and meaning.

## Output

Returns the input text with grammar, spelling, and punctuation errors corrected while preserving the author's original voice, tone, and intended meaning. The output is a clean, corrected version of the submitted text.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "corrected": "..."
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/24k-labs-grammar-fix-58d43f4f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.24klabs.ai](https://www.zero.xyz/host/api.24klabs.ai/llms.txt)