# NexusAPI Grammar Checker

> NexusAPI Grammar Checker is a paid API for AI agents from nexus-api-peach-nine.vercel.app, paid per call via x402, $0.184005/call, status unknown (last checked 2026-09-15).

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

## Facts

- Endpoint: POST https://nexus-api-peach-nine.vercel.app/api/ai/grammar
- Price: $0.184005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nexusapi-grammar-checker-5a26f0e0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MC8J178QT0fdeFCm6rQP-

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 nexusapi-grammar-checker-5a26f0e0 -d '<json body>'
```

Example prompt: Can you check the grammar in this sentence and tell me if there are any errors: 'She don't know what to do with all these informations she have collected.'

## When to prefer this

Use this endpoint when you need a pay-per-call grammar check with no API key setup, particularly in automated agent workflows on the Base blockchain payment rail. Suitable for one-off grammar validation tasks where setting up a subscription-based grammar API is overkill.

## Known failure modes

- Empty query string returns an error or empty result
- Very long input may exceed processing limits
- Non-English text may produce inaccurate results
- Ambiguous or highly technical text may yield false positives
- API returns generic 402 Payment Required if USDC payment not attached

## How this service works

Crypto, AI, Social Media, Finance, Weather, Tools &amp; more. Pay per call in USDC on Base. No API keys.

## Output

Returns grammar corrections, identified errors, and/or a corrected version of the submitted text

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "query": {
   "type": "string",
   "description": "Search query or input parameter"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "description": "API response data"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/nexusapi-grammar-checker-5a26f0e0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nexus-api-peach-nine.vercel.app](https://www.zero.xyz/host/nexus-api-peach-nine.vercel.app/llms.txt)