# whatchuneed Grammar Check API

> whatchuneed Grammar Check API is a paid API for AI agents from whatchuneed.vercel.app, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-13).

Checks and corrects grammar in a given text string, returning corrected output

## Facts

- Endpoint: POST https://whatchuneed.vercel.app/api/util/grammar
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/whatchuneed-grammar-check-api-8fe18421
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Ezkn8ETo53VoEL0LozX-j

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 whatchuneed-grammar-check-api-8fe18421 -d '<json body>'
```

Example prompt: Can you check the grammar of this sentence and fix any errors: 'She go to the store yesterday and buyed some apples'?

## When to prefer this

Choose this endpoint when you need a pay-per-call, no-subscription grammar correction service accessible via a single unified API. Ideal for agents that only occasionally need grammar checking without committing to a dedicated NLP service. Best suited for short-to-medium text strings where quick, per-use billing via the x402 protocol is preferred over bulk or batch grammar checking platforms.

## Known failure modes

- Empty or missing 'input' field returns a validation error
- Extremely long text inputs may time out or return partial results
- Non-English or mixed-language text may produce inaccurate corrections
- Ambiguous sentences may be over-corrected or altered in unintended ways
- Network or payment processing failure returns a 402 or 5xx error

## How this service works

320+ pay-per-call API endpoints across accommodation, LLM, code execution, crypto, medical, finance, and more. One API, one payment. Powered by x402 protocol.

## Output

Returns a result object containing the grammar-checked and corrected version of the input text, along with a status field indicating success or failure of the operation.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "string",
   "description": "Request input"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "result": {
   "type": "object",
   "description": "Response data"
  },
  "status": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/whatchuneed-grammar-check-api-8fe18421/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from whatchuneed.vercel.app](https://www.zero.xyz/host/whatchuneed.vercel.app/llms.txt)