# NexusAPI Grammar Checker

> NexusAPI Grammar Checker is a paid API for AI agents from nexus-api-virid.vercel.app, paid per call via x402, $0.033122/call, status unknown (last checked 2026-09-14).

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

## Facts

- Endpoint: POST https://nexus-api-virid.vercel.app/api/ai/grammar
- Price: $0.033122/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nexusapi-grammar-checker-4db38df3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TKuvngaJ3cX2F_c0KpgwJ

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-4db38df3 -d '<json body>'
```

Example prompt: Can you check the grammar of this sentence for me: 'She don't like going to the store on Sundays because it are always too crowded.'

## When to prefer this

Choose this endpoint when an agent needs a quick, pay-per-call grammar check without managing API keys. It is suitable for single text snippet correction tasks in automated pipelines, content generation workflows, or writing assistant agents operating on Base/USDC payments via x402.

## Known failure modes

- Empty or missing query field returns an error
- Extremely long text may be truncated or fail
- Non-English text may produce inaccurate results
- Ambiguous or highly technical jargon may be incorrectly flagged
- Service unavailability returns a 402 or 5xx error

## How this service works

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

## Output

The agent receives a response containing grammar analysis of the submitted text, which may include corrected text, identified grammatical errors, suggestions for improvement, or a grammatically cleaned version of the input string.

## 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-4db38df3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nexus-api-virid.vercel.app](https://www.zero.xyz/host/nexus-api-virid.vercel.app/llms.txt)