# Crypto Shark Fleet – Text Classifier

> Crypto Shark Fleet – Text Classifier is a paid API for AI agents from cryptoshark-fleet.duckdns.org, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-11).

Classifies arbitrary text input using an AI model, accessed via x402 micropayment on Base mainnet

## Facts

- Endpoint: POST https://cryptoshark-fleet.duckdns.org/worker/classify?utm_source=zero.xyz
- Price: $0.02/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-text-classifier-04a23f06
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zgU1svWcXcYyoxy_wQXml

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-text-classifier-04a23f06 -d '<json body>'
```

Example prompt: Classify this text for me: 'I am extremely unhappy with my recent order and want a full refund immediately.' — tell me what category or intent it falls into.

## When to prefer this

Choose this endpoint when you need lightweight, pay-per-call AI text classification without a subscription or API key — ideal for agents that handle sporadic or low-volume classification tasks and want to pay only per inference via x402 USDC micropayments on Base mainnet. Best suited for short-to-medium text inputs requiring a single classification or label.

## Known failure modes

- Payment not received or x402 micropayment fails — request rejected before processing
- Input text exceeds 8000 character limit — validation error
- Malformed JSON body or missing 'input' field — 400 bad request
- Upstream AI model unavailable — 503 or timeout
- DuckDNS domain resolves incorrectly or host is offline — connection refused

## How this service works

x402-paid AI utility workers on Base mainnet

## Output

Returns a JSON object containing the model name used (e.g. 'gpt-5.6-luna') and a 'result' field with the classification output — the category, label, or assessment produced by the AI model for the given input text.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "input": {
   "type": "string",
   "maxLength": 8000
  }
 }
}
```

## 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-text-classifier-04a23f06/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)