# NexusAPI AI Sentiment Analysis

> NexusAPI AI Sentiment Analysis is a paid API for AI agents from nexus-api-virid.vercel.app, paid per call via x402, $0.062018/call, status unknown (last checked 2026-09-14).

Analyzes the sentiment of a given text or search query and returns a sentiment classification with scoring

## Facts

- Endpoint: POST https://nexus-api-virid.vercel.app/api/ai/sentiment
- Price: $0.062018/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nexusapi-ai-sentiment-analysis-b6d47aeb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Q9_haitJhJUu8LuQ_d41Q

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-ai-sentiment-analysis-b6d47aeb -d '<json body>'
```

Example prompt: Can you analyze the sentiment of this customer review and tell me whether it's positive, negative, or neutral: 'The product arrived on time but the packaging was damaged and customer support was unhelpful'?

## When to prefer this

Choose this endpoint when you need a quick, pay-per-call sentiment classification without managing API keys or subscriptions — ideal for agents that process occasional text inputs and want to avoid committing to a fixed-cost NLP platform. Best suited for English-language text sentiment tasks where a simple positive/negative/neutral classification is sufficient.

## Known failure modes

- Empty or missing query field returns a validation error
- Extremely long text inputs may be truncated or fail
- Ambiguous or very short inputs may produce low-confidence or unreliable sentiment scores
- Non-English text may return incorrect or unsupported sentiment results
- Service downtime on Vercel hosting may cause 502 or 503 errors

## 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 a sentiment classification (e.g. positive, negative, neutral) along with associated scoring or confidence metrics for the provided text input

## 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-ai-sentiment-analysis-b6d47aeb/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)