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AgentRXI Nemotron 3 120B Chat Completions
x402
AgentRXI Nemotron 3 120B Chat Completions is a paid API for AI agents from agentrxi.com, paid per call via x402, $0.011246/call, status unknown (last checked 2026-10-15).
Runs OpenAI-compatible chat completions with tool calling and reasoning on NVIDIA Nemotron 3 120B, billed per token via x402 micropayments
Price / call$0.011246
Success—
StatusUnknown
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://agentrxi.com/v1/nemotron and pay per token with x402 instead of an API key: $1.5 per million input and $4.5 per million output tokens, minimum $0.002 a call, at most $0.0254. The 402 quotes your request's maximum; "upto" payers are charged only the tokens used. Same request/response shape as OpenAI (tool calling, reasoning, streaming suppo
Output
Returns an OpenAI-compatible chat.completion JSON object including the assistant's message content or tool calls, finish reason, model name, and a token usage breakdown (prompt, completion, and total tokens).
Example use cases
Agentic tool-calling pipeline
“I need you to use Nemotron 3 120B to process this user request and call the appropriate tools to fetch live data: 'What is the current weather in Paris and convert it to Fahrenheit?' — keep it under 300 tokens.”
Complex reasoning over a long prompt
“Run this through Nemotron 120B with a system prompt that says 'You are a senior software architect' and ask it: 'Design a microservices architecture for a real-time payments platform, covering scalability and fault tolerance.' Allow up to 1000 output tokens.”
Drop-in OpenAI SDK replacement for code review
“Send this Python code snippet to the Nemotron 3 120B model for a detailed review and bug report, using temperature 0.2 and max 600 tokens: 'def divide(a, b): return a/b'”
Technical details
Endpoint
GEThttps://agentrxi.com/v1/nemotron/chat/completions?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a very large (120B parameter) NVIDIA Nemotron model with agentic tool-calling and reasoning capabilities, billed precisely per token via x402 micropayments with no subscription or API key required — ideal for agents that need powerful inference on demand without committing to a fixed-cost API plan.
Side effects
- 402 Payment Required if x402 payment is missing or insufficient
- prompt parameter missing causes validation error
- max_tokens exceeded for model context window
- temperature out of valid range causes bad request
- network timeout for very long completions
- model unavailable or overloaded returns 503
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"id": "chatcmpl-...",
"model": "nemotron-3-120b",
"usage": {
"total_tokens": 18,
"prompt_tokens": 14,
"completion_tokens": 4
},
"object": "chat.completion",
"choices": [
{
"index": 0,
"message": {
"role": "assistant",
"content": "Bonjour !"
},
"finish_reason": "stop"
}
]
}
}Tags
x402
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