# Agent Hub – NVIDIA Nemotron 3 120B Chat Completions

> Agent Hub – NVIDIA Nemotron 3 120B Chat Completions is a paid API for AI agents from agents.torbrooknews.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-13).

Provides OpenAI-compatible chat completions with agentic reasoning and tool calling powered by NVIDIA Nemotron 3 120B, payable at $0.01 per request via x402.

## Facts

- Endpoint: GET https://agents.torbrooknews.com/v1/nemotron/chat/completions?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-hub-nvidia-nemotron-3-120b-chat-completions-fbeccc5d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nvj8xy2h2vlVK-v5oNdtq

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 agent-hub-nvidia-nemotron-3-120b-chat-completions-fbeccc5d
```

Example prompt: Ask Nemotron 3 120B to reason through this multi-step problem: given the following list of tasks and deadlines, create a prioritized plan with justifications for each decision, using a system prompt that emphasizes concise, structured output.

## When to prefer this

Choose this endpoint when you need a very large (120B parameter) model with strong agentic reasoning and tool calling, want OpenAI SDK drop-in compatibility, prefer micropayment-per-call billing over API key subscriptions, and do not want to manage credentials. Prefer over smaller sibling models (Llama 70B, GLM 4.7 Flash) when task complexity demands stronger reasoning.

## Known failure modes

- Payment not received or x402 authentication fails — request rejected with 402 status
- Prompt exceeds model context window — returns a context length error
- Invalid JSON in query parameters when using GET method — 400 bad request
- Tool schema malformed — model returns error or ignores tool calls
- Rate limiting or upstream NVIDIA inference timeout — 5xx response

## How this service works

OpenAI-compatible chat completions on NVIDIA Nemotron 3 120B, agentic reasoning with tool calling. Set your OpenAI SDK base URL to https://agents.torbrooknews.com/v1/nemotron and pay $0.01 per request with x402 instead of an API key. Same request/response shape as OpenAI (tool calling, reasoning, streaming supported), up to 4096 output tokens. Also callable as GET with the same fields as query parameters.

## Output

Returns an OpenAI-compatible chat completion object containing the assistant's message, optional tool call payloads, and usage metadata. Streaming is supported. Maximum 4096 output tokens per response.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "prompt"
     ],
     "properties": {
      "prompt": {
       "type": "string",
       "description": "User message"
      },
      "system": {
       "type": "string",
       "description": "Optional system message"
      },
      "max_tokens": {
       "type": "integer"
      },
      "temperature": {
       "type": "number"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-hub-nvidia-nemotron-3-120b-chat-completions-fbeccc5d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agents.torbrooknews.com](https://www.zero.xyz/host/agents.torbrooknews.com/llms.txt)