# lowpaymentfee.com Sentiment Analysis

> lowpaymentfee.com Sentiment Analysis is a paid API for AI agents from lowpaymentfee.com, paid per call via x402, $0.02/call, status down (last checked 2026-09-16, last successful call 2026-05-02).

Analyzes the sentiment of a given text string, returning a sentiment classification or score

## Facts

- Endpoint: POST https://lowpaymentfee.com/api/v2/ai/sentiment
- Price: $0.02/call
- Payment: x402
- Status: down
- Last checked: 2026-09-16
- Last successful call: 2026-05-02
- Success rate: 100% of calls made through Zero
- Activations on Zero: 1
- Tags: x402
- Canonical page: https://www.zero.xyz/c/lowpaymentfee-com-85769481
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yui5zA0AFTj_NEIUkCDUA

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 lowpaymentfee-com-85769481 -d '<json body>'
```

Example prompt: Classify the sentiment of this customer review as positive, negative, or neutral: "The product arrived quickly but the packaging was completely crushed and the item was broken."

## When to prefer this

Use this endpoint when you need a simple, pay-per-call sentiment classification on arbitrary text and want to avoid subscription commitments. At $0.02 per call, it is suited for low-to-medium volume sentiment tasks.

## Known failure modes

- Missing required 'text' field returns a 400 validation error
- Empty string input may return an error or undefined sentiment
- Very long text inputs may be truncated or rejected
- Payment failure (x402) if insufficient USDC balance
- Service unavailability returns 5xx errors
- Ambiguous or mixed-sentiment text may return low-confidence results

## How this service works

Premium API Access

## Output

A sentiment classification or score indicating the emotional polarity of the input text, likely including a label (positive/negative/neutral) and possibly a confidence score.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/lowpaymentfee-com-85769481/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from lowpaymentfee.com](https://www.zero.xyz/host/lowpaymentfee.com/llms.txt)