{"uid":"cap_fOT3kaxwGThRlYXa9QJ3g","slug":"agentrxi-nemotron-3-120b-chat-completions-d6f2b896","name":"AgentRXI Nemotron 3 120B Chat Completions","description":"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 $0.0254. The 402 quotes your request's maximum; \"upto\" payers are charged only the tokens used. Same request/response shape as OpenAI (tool calling, reasoning, streaming suppo","url":"https://agentrxi.com/v1/nemotron/chat/completions?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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"}}}}},"responseSchema":{"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"}]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.011246","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.011246/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.011246","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.011246","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_hrpitm-hYw_c3uFexdNSA","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.011246","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Runs OpenAI-compatible chat completions with tool calling and reasoning on NVIDIA Nemotron 3 120B, billed per token via x402 micropayments","exampleAgentPrompt":"Use Nemotron 3 120B to answer this question with up to 500 tokens: 'What are the top three considerations when designing a multi-agent system?'","exampleUseCases":[{"title":"Agentic tool-calling pipeline","prompt":"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."},{"title":"Complex reasoning over a long prompt","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."},{"title":"Drop-in OpenAI SDK replacement for code review","prompt":"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'"}],"resultDescription":"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).","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-15T06:39:07.363Z","isFirstParty":false,"canonicalSlug":"agentrxi-nemotron-3-120b-chat-completions-d6f2b896"}