# DataVault Grammar Checker

> DataVault Grammar Checker is a paid API for AI agents from zetavault.vercel.app, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-15).

Checks and corrects grammar in a given text using AI-powered text processing

## Facts

- Endpoint: POST https://zetavault.vercel.app/api/grammar
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/datavault-grammar-checker-d261d6f7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JI_wQaG8X-FfgPCuYHyne

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 datavault-grammar-checker-d261d6f7 -d '<json body>'
```

Example prompt: Can you check the grammar in this paragraph and let me know what needs fixing: 'She go to the store yesterday and buyed some apple, its very fresh.'

## When to prefer this

Choose this endpoint when you need a pay-per-call, no-subscription grammar check over USDC on Base, especially within an agentic workflow that already handles x402 payments. Suitable for lightweight, single-text grammar validation without requiring a full NLP platform integration.

## Known failure modes

- Missing required 'text' field returns validation error
- Empty string input may return empty or error response
- Extremely long text may time out or be truncated
- Payment failure (402) if USDC not provided or insufficient
- Service unavailable if zetavault.vercel.app is down

## How this service works

54 endpoints spanning local tools, live data feeds, and AI-powered text processing. Pay-per-call with USDC on Base.

## Output

Returns a JSON object with a success boolean and a data object containing grammar analysis results, likely including identified errors, corrections, and/or a corrected version of the input text.

## Request schema (JSON Schema)

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

## 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/datavault-grammar-checker-d261d6f7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from zetavault.vercel.app](https://www.zero.xyz/host/zetavault.vercel.app/llms.txt)