# DataVault Grammar Checker

> DataVault Grammar Checker is a paid API for AI agents from zetdatavault.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://zetdatavault.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-61a6fbbd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Z-RDEni8Jv87vcCrLahSI

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-61a6fbbd -d '<json body>'
```

Example prompt: Can you check the grammar in this sentence and fix any mistakes: 'She don't know where is the keys that I was looking for yesterday.'

## When to prefer this

Choose this endpoint when you need quick, pay-per-call grammar checking without a subscription. Ideal for agents that only occasionally need grammar validation and want to pay $0.03 USDC per check rather than maintaining an NLP service subscription. Good for validating user-generated content, proofreading drafts, or ensuring grammatical correctness before publishing.

## Known failure modes

- Missing required 'text' field returns 400 error
- Empty string input may return no corrections or an error
- Very long text may exceed processing limits
- Payment failure (402) if USDC balance is insufficient on Base
- Network timeout for unusually large text inputs

## 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 corrections, identified errors, and/or a corrected version of the submitted 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-61a6fbbd/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from zetdatavault.vercel.app](https://www.zero.xyz/host/zetdatavault.vercel.app/llms.txt)