# Nova AI Inference — Text Classification

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

Classifies input text into user-defined categories using pay-per-call AI inference, returning a classification result with model and usage metadata.

## Facts

- Endpoint: POST https://nova.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-inference-text-classification-b4855c6d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_eFtw1KxEVIrVYNCRveVhn

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-inference-text-classification-b4855c6d -d '<json body>'
```

Example prompt: Classify this customer support message into one of these categories — billing, technical issue, or general inquiry — using Nova's classify endpoint: 'I was charged twice for my subscription this month and need a refund.'

## When to prefer this

Choose this endpoint when you need to classify free-form text into custom categories via a pay-per-call model with no subscription required, especially in crypto-native or agentic workflows that support x402 payments in USDC on Base.

## Known failure modes

- Missing required 'text' field returns a 400 validation error
- Invalid or empty categories array may produce ambiguous or default classification
- Payment failure (insufficient USDC balance) returns a 402 Payment Required
- Unknown or malformed task descriptor may result in generic classification behavior
- Rate limiting or server overload may return 429 or 503

## How this service works

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

## Output

Returns a JSON object with a 'data' field containing the classification result object, the model used, provider name, and token usage stats; plus a 'success' boolean and metadata in 'meta'.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "text"
 ],
 "properties": {
  "task": {
   "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-inference-text-classification-b4855c6d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nova.orbonomy.xyz](https://www.zero.xyz/host/nova.orbonomy.xyz/llms.txt)