# x402-agent-economy-lab Sentiment Analysis API

> x402-agent-economy-lab Sentiment Analysis API is a paid API for AI agents from 9uqdtv-ip-209-115-177-214.tunnelmole.net, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Analyzes the sentiment of a given text string and returns a sentiment classification, paid per call in real USDC on Base mainnet via x402.

## Facts

- Endpoint: POST https://9uqdtv-ip-209-115-177-214.tunnelmole.net/v1/sentiment
- Price: $0.005/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-api-19d34a66
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1XcRb1BNjfEyioOWXp6d5

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-api-19d34a66 -d '<json body>'
```

Example prompt: Analyze the sentiment of this customer review and tell me if it's positive, negative, or neutral: 'The delivery was fast but the product quality was really disappointing — I expected much better for the price.'

## When to prefer this

Choose this endpoint when you need pay-per-call, machine-payable sentiment analysis with no subscription required — ideal for AI agents that autonomously pay per inference using USDC on Base mainnet via x402. Best for sporadic, unpredictable usage patterns where a subscription model would be wasteful, or for agent pipelines that need crypto-native billing.

## Known failure modes

- Empty or missing 'text' field in the request body returns a validation error
- Payment failure or insufficient USDC balance results in a 402 Payment Required response
- Text that is too long may be truncated or rejected depending on model limits
- Tunnelmole tunnel downtime may cause connection timeouts or 502 errors
- Ambiguous or very short text may return low-confidence or neutral classification

## 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) and likely a confidence score or polarity value for the analyzed text. The response is delivered after a real USDC micropayment is settled on Base mainnet via the x402 protocol.

## 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-api-19d34a66/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 9uqdtv-ip-209-115-177-214.tunnelmole.net](https://www.zero.xyz/host/9uqdtv-ip-209-115-177-214.tunnelmole.net/llms.txt)