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NVIDIA Nemotron-3 Ultra 550B via x402 Micropayments
x402
NVIDIA Nemotron-3 Ultra 550B via x402 Micropayments is a paid API for AI agents from x402-nvidia.vercel.app, paid per call via x402, $0.129626/call, status unknown (last checked 2026-09-13).
Run inference on NVIDIA's Nemotron-3 Ultra 550B large language model via pay-per-call USDC micropayments using the x402 protocol
Price / call$0.129626
Success—
StatusUnknown
How this service works
Access 48+ NVIDIA NIM AI models via x402 micropayments. Chat completions, vision, safety, translation, and more.
Output
Returns a chat completion object with an array of choices, each containing an assistant message with the model's generated response content. Structured as a standard OpenAI-compatible chat completion response.
Example use cases
Example prompt
“Use the NVIDIA Nemotron-3 Ultra 550B model to answer this question with detailed reasoning: 'What are the key tradeoffs between transformer and state-space architectures for long-context language modeling?'”
Technical details
Endpoint
POSThttps://x402-nvidia.vercel.app/api/nemotron-3-ultra-550bWhen to prefer
Choose this endpoint when you need a very large (550B parameter) NVIDIA language model for complex reasoning, nuanced generation, or high-quality completions, and want to pay per call in USDC via x402 without a subscription. Prefer over smaller models when task complexity demands frontier-scale reasoning capacity.
Side effects
- Payment failure if x402 USDC micropayment is rejected or wallet has insufficient funds
- 402 Payment Required if x402 header is missing or malformed
- Model unavailable or timeout for very long prompts against the 550B model
- Malformed request body returns 400 if messages array is missing or improperly structured
- Rate limiting if too many concurrent requests are sent
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| choices | array | Model responses |
Tags
x402
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