# Tempest AI Proofreader

> Tempest AI Proofreader is a paid API for AI agents from tempost.vercel.app, paid per call via x402, $0.15/call, status unknown (last checked 2026-10-11).

Proofreads submitted text using AI, identifying and correcting grammar, spelling, punctuation, and style errors.

## Facts

- Endpoint: POST https://tempost.vercel.app/api/proofread?utm_source=zero.xyz
- Price: $0.15/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tempest-ai-proofreader-ce4e2192
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kixPU5gGerzeeg4oDXEg1

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 tempest-ai-proofreader-ce4e2192 -d '<json body>'
```

Example prompt: Can you proofread this paragraph for me and fix any grammar, spelling, or punctuation issues: 'Their going to the store tommorow, but she dont know what time they will arive.'

## When to prefer this

Choose this endpoint when you need a quick, pay-per-call AI proofreading pass on a piece of text without committing to a full SaaS subscription. It is well-suited for agents that handle writing tasks episodically rather than at high volume, and when you want grammar, spelling, and punctuation correction in a single atomic call rather than assembling a pipeline of NLP tools.

## Known failure modes

- Empty or missing 'text' field returns a 400 validation error
- Extremely long text inputs may time out or be truncated
- Non-text or binary input will fail schema validation
- Payment failure via x402 protocol prevents call execution
- Service unavailability on vercel.app infrastructure returns 500

## How this service works

Compose, rewrite, translate, and refine content at scale. 25 AI-powered endpoints. Pay-per-call with USDC on Tempo.

## Output

Returns a JSON object with a success boolean and a data object containing the proofread version of the submitted text, along with likely corrections or annotations indicating the changes made to grammar, spelling, punctuation, and style.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "text"
 ],
 "properties": {
  "text": {
   "type": "string",
   "description": "Text to proofread"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "data": {
   "type": "object"
  },
  "success": {
   "type": "boolean"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tempest-ai-proofreader-ce4e2192/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from tempost.vercel.app](https://www.zero.xyz/host/tempost.vercel.app/llms.txt)