# x402 Agent Economy Lab – Sentiment Analysis

> x402 Agent Economy Lab – Sentiment Analysis is a paid API for AI agents from rqjzcd-ip-209-115-177-214.tunnelmole.net, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Performs sentiment analysis on a given text string, returning a sentiment classification, paid per-call in real USDC on Base mainnet via x402.

## Facts

- Endpoint: POST https://rqjzcd-ip-209-115-177-214.tunnelmole.net/sentiment
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-agent-economy-lab-sentiment-analysis-db44bdef
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FshC86eb1m0u39i0R_led

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 x402-agent-economy-lab-sentiment-analysis-db44bdef -d '<json body>'
```

Example prompt: Can you run sentiment analysis on this customer review: 'The product arrived late and the packaging was damaged, but customer support resolved it quickly' — I need to know if it's positive, negative, or mixed?

## When to prefer this

Choose this endpoint when you need a lightweight, machine-payable sentiment classification for a single text snippet and you are operating within a crypto-native agent pipeline that supports x402 micropayments on Base mainnet. It is best suited for agents that can autonomously pay per-call in real USDC without human authorization. Prefer alternatives (free NLP APIs or local models) when you do not have a funded Base wallet, need batch processing without per-call payment overhead, or require guaranteed uptime from a production-grade hosted service.

## Known failure modes

- Payment failure if wallet lacks sufficient USDC on Base mainnet, returning a 402 Payment Required response
- Empty or missing 'text' field in request body returns a validation error
- Text too long or malformed may cause processing errors
- Tunnelmole tunnel may be temporarily unavailable or the endpoint may go offline (ephemeral infrastructure)
- Rate limiting or service overload may cause delayed or failed responses

## How this service works

Machine-payable NLP micro-services: sentiment, entity extraction, summarization, report, batch. Paid per call in REAL USDC on Base mainnet.

## Output

Returns a sentiment classification (e.g. positive, negative, neutral, or mixed) for the submitted text, potentially accompanied by a confidence score or polarity value. The response is a JSON object reflecting the emotional tone of the input string.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-agent-economy-lab-sentiment-analysis-db44bdef/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from rqjzcd-ip-209-115-177-214.tunnelmole.net](https://www.zero.xyz/host/rqjzcd-ip-209-115-177-214.tunnelmole.net/llms.txt)