# GPT-5.4-mini Fast Grammar Cleanup & Rewrite Tool

> GPT-5.4-mini Fast Grammar Cleanup & Rewrite Tool is a paid API for AI agents from gpt55.558686.xyz, paid per call via x402, $0.002627/call, status unknown (last checked 2026-09-14).

Performs fast grammar cleanup and concise rewrites of text using a mini-tier GPT model, paid via x402 USDC on Base

## Facts

- Endpoint: POST https://gpt55.558686.xyz/v1/tools/rewrite/mini
- Price: $0.002627/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/gpt-5-4-mini-fast-grammar-cleanup-rewrite-tool-3856e4e8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nEDbSLJgnYlu-5sftGVBf

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 gpt-5-4-mini-fast-grammar-cleanup-rewrite-tool-3856e4e8 -d '<json body>'
```

Example prompt: Can you clean up the grammar and rewrite this paragraph more concisely using a professional tone? Here's the text: 'The meeting was, it went well and we discussed many things and everyone agree that the project should move forward but nobody wrote down what was said.'

## When to prefer this

Choose this endpoint when you need fast, low-cost grammar correction and concise rewriting for moderate-length text (up to 700K chars) and want to pay per-call via USDC on Base. Prefer this over larger model tiers when speed and cost efficiency matter more than maximum reasoning depth, and over generic chat completions when a focused rewrite/cleanup interface is sufficient.

## Known failure modes

- Input text exceeds 700,000 character limit — returns 400 validation error
- max_tokens set above 4096 — returns 400 validation error
- Temperature out of 0–2 range — returns 400 validation error
- Insufficient USDC balance for x402 payment — returns 402 Payment Required
- Upstream model unavailable — returns 503 or upstream timeout
- Empty or whitespace-only text — returns 400 minLength violation

## How this service works

Fast grammar cleanup and concise rewrites. Model tier: mini; upstream model: gpt-5.4-mini. Price is derived from official OpenAI relative token costs with a local margin and floor. Pay up to $0.002627 per request with x402 USDC on Base. Public paid calls are limited to 700000 input characters and 4096 output tokens.

## Output

Returns a grammar-corrected, concise rewrite of the submitted text, constrained to the specified output token limit and shaped by any provided tone or instruction parameters. Output is plain rewritten prose.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string",
   "maxLength": 700000,
   "minLength": 1
  },
  "tone": {
   "type": "string"
  },
  "max_tokens": {
   "type": "integer",
   "maximum": 4096,
   "minimum": 1
  },
  "instruction": {
   "type": "string"
  },
  "temperature": {
   "type": "number",
   "maximum": 2,
   "minimum": 0
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/gpt-5-4-mini-fast-grammar-cleanup-rewrite-tool-3856e4e8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from gpt55.558686.xyz](https://www.zero.xyz/host/gpt55.558686.xyz/llms.txt)