# NEXUS Sentiment Analysis

> NEXUS Sentiment Analysis is a paid API for AI agents from nexus-agent-xa12.onrender.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-16).

Analyzes the sentiment of a given text string and returns a sentiment label and numeric score

## Facts

- Endpoint: POST https://nexus-agent-xa12.onrender.com/sentiment
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nexus-sentiment-analysis-554e3ecf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cIZ6Ee2vsl6vlpjF-NXMX

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 nexus-sentiment-analysis-554e3ecf -d '<json body>'
```

Example prompt: Can you analyze the sentiment of this text and tell me if it's positive, negative, or neutral with a confidence score: 'The Fed's surprise rate cut sent markets surging to record highs as investors cheered the dovish pivot'?

## When to prefer this

Choose this endpoint when you need a quick, pay-per-call sentiment score on financial or market-related text without committing to a subscription. At $0.002 per call it is cost-effective for sporadic or high-volume agentic workflows that already support x402 USDC payments on Base. Prefer it over general-purpose NLP APIs when you want a lightweight, streaming-compatible MCP integration for financial text sentiment specifically.

## Known failure modes

- Empty or missing 'text' field returns a validation error
- Overly long text inputs may be truncated or rejected
- Payment failure via x402/USDC on Base results in a 402 response and no analysis
- Service unavailability on Render.com hosting may cause intermittent 503 errors
- Non-English text may produce unreliable or low-confidence scores

## How this service works

Pay-per-call financial data. Streamable HTTP MCP. x402 USDC on Base. Not financial advice.

## Output

Returns a JSON object with a numeric sentiment score (e.g. 0.82 on a 0-1 scale), a human-readable sentiment label (e.g. 'positive', 'negative', 'neutral'), and a source identifier ('NEXUS').

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "score": 0.82,
  "source": "NEXUS",
  "sentiment": "positive"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/nexus-sentiment-analysis-554e3ecf/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nexus-agent-xa12.onrender.com](https://www.zero.xyz/host/nexus-agent-xa12.onrender.com/llms.txt)