# Nova AI Text Classification

> Nova AI Text Classification is a paid API for AI agents from noa.orbonomy.xyz, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Classifies input text into user-specified categories using pay-per-call AI inference on Base/USDC

## Facts

- Endpoint: POST https://noa.orbonomy.xyz/api/classify
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nova-ai-text-classification-9c84158a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_eQj627ODTqx0C3L3zjn1W

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 nova-ai-text-classification-9c84158a -d '<json body>'
```

Example prompt: Classify this customer review as 'positive', 'negative', or 'neutral' using Nova: "The shipping was fast but the product quality was disappointing and not worth the price."

## When to prefer this

Choose this endpoint when you need lightweight, pay-per-call text classification without a subscription, especially when working in agentic workflows that already handle x402/USDC payments on Base. Ideal for one-off classification tasks or when you want to specify custom categories dynamically rather than using a fixed taxonomy.

## Known failure modes

- Missing required 'text' field returns validation error
- Invalid or empty categories array may produce unexpected classification
- Payment failure in USDC on Base causes 402 error before inference runs
- Ambiguous or very short text may yield low-confidence or incorrect classification
- Unsupported task type may cause inference error or fallback behavior

## How this service works

Pay-per-call AI inference. Chat, reason, translate, analyze, generate. USDC on Base.

## Output

Returns a classification object indicating which category the text belongs to, along with the model used, token usage stats, the underlying provider, and a success flag.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "text"
 ],
 "properties": {
  "task": {
   "enum": [
    "sentiment",
    "classify",
    "intent",
    "toxicity",
    "language"
   ],
   "type": "string"
  },
  "text": {
   "type": "string",
   "description": "Text to classify"
  },
  "categories": {
   "type": "array",
   "description": "Categories for classification task"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "data": {
   "type": "object",
   "properties": {
    "task": {
     "type": "string"
    },
    "model": {
     "type": "string"
    },
    "usage": {
     "type": "object"
    },
    "provider": {
     "type": "string"
    },
    "classification": {
     "type": "object"
    }
   }
  },
  "meta": {
   "type": "object"
  },
  "success": {
   "type": "boolean"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/nova-ai-text-classification-9c84158a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from noa.orbonomy.xyz](https://www.zero.xyz/host/noa.orbonomy.xyz/llms.txt)