# Crypto Shark Fleet – Sentiment Analysis Worker

> Crypto Shark Fleet – Sentiment Analysis Worker is a paid API for AI agents from cryptoshark-fleet.duckdns.org, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-11).

Analyzes the sentiment of a given text input using an AI model, returning a sentiment result for the provided content

## Facts

- Endpoint: POST https://cryptoshark-fleet.duckdns.org/worker/sentiment?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crypto-shark-fleet-sentiment-analysis-worker-128614fa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fI_qwAWAsGZEPwHF3Mvo9

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 crypto-shark-fleet-sentiment-analysis-worker-128614fa -d '<json body>'
```

Example prompt: Can you run a sentiment analysis on this customer review: 'The onboarding was smooth but the fees were way higher than expected and support took three days to respond'?

## When to prefer this

Choose this endpoint when you need a low-cost, per-call sentiment analysis of arbitrary text via a crypto-native payment flow (x402 on Base mainnet), especially within agent pipelines that already handle USDC micropayments. Best suited for single-text classification tasks up to 10,000 characters where a fast turnaround is needed and you want to avoid subscription-based NLP APIs.

## Known failure modes

- Text input exceeds 10,000 character limit — request rejected
- Payment of $0.03 USDC not fulfilled via x402 — 402 Payment Required response
- Empty or missing 'input' field — likely validation error or empty result
- Upstream AI model unavailable — service error response
- Malformed JSON body — request parsing failure

## How this service works

x402-paid AI utility workers on Base mainnet

## Output

A JSON object containing the model used (e.g. 'gpt-5.6-luna') and a 'result' field with the sentiment classification or analysis output for the submitted text.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "input": {
   "type": "string",
   "maxLength": 10000
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "model": "gpt-5.6-luna",
  "result": "..."
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/crypto-shark-fleet-sentiment-analysis-worker-128614fa/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from cryptoshark-fleet.duckdns.org](https://www.zero.xyz/host/cryptoshark-fleet.duckdns.org/llms.txt)