# Nova AI Inference API

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

Provides pay-per-call AI chat and inference via POST, accepting message arrays and returning generated text responses, paid with USDC on Base.

## Facts

- Endpoint: POST https://nuvo.orbonomy.xyz/api/chat
- 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-api-141a6774
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VoXTuJIUdEiixVRZ-WsVg

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-api-141a6774 -d '<json body>'
```

Example prompt: Use Nova to ask an AI to translate the following text into French and summarize it in 3 sentences, keeping the response under 300 tokens: 'The global economy is shifting rapidly due to technological advancements and changing geopolitical landscapes.'

## When to prefer this

Prefer this endpoint when you need AI chat/inference capabilities billed per call via USDC on Base without a subscription, particularly in agentic workflows where cost-control per invocation matters. Good for one-off AI tasks like translation, reasoning, or analysis where you want crypto-native micropayment settlement.

## Known failure modes

- Payment not received or insufficient USDC balance — returns 402 Payment Required
- Missing required 'messages' field — returns 400 Bad Request
- Invalid message format or malformed JSON — returns 400 validation error
- Model unavailable or overloaded — may return 503 Service Unavailable
- Token limit exceeded — finish_reason may be 'length' rather than 'stop'
- Network timeout on the inference backend — returns 504 or empty response

## How this service works

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

## Output

Returns a JSON object with a success flag, the generated text content, model name, token usage breakdown (prompt, completion, total tokens), finish reason, a unique response ID, and metadata including price, endpoint, and timestamp.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "messages"
 ],
 "properties": {
  "messages": {
   "type": "array"
  },
  "max_tokens": {
   "type": "integer"
  },
  "temperature": {
   "type": "number"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "data": {
   "type": "object",
   "properties": {
    "id": {
     "type": "string"
    },
    "model": {
     "type": "string"
    },
    "usage": {
     "type": "object",
     "properties": {
      "total_tokens": {
       "type": "integer"
      },
      "prompt_tokens": {
       "type": "integer"
      },
      "completion_tokens": {
       "type": "integer"
      }
     }
    },
    "content": {
     "type": "string"
    },
    "finish_reason": {
     "type": "string"
    }
   }
  },
  "meta": {
   "type": "object",
   "properties": {
    "model": {
     "type": "string"
    },
    "price": {
     "type": "string"
    },
    "endpoint": {
     "type": "string"
    },
    "timestamp": {
     "type": "string"
    }
   }
  },
  "success": {
   "type": "boolean"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/nova-ai-inference-api-141a6774/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nuvo.orbonomy.xyz](https://www.zero.xyz/host/nuvo.orbonomy.xyz/llms.txt)