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Gambit GPU Shop – Nemotron-3-Super 120B Chat (x402)
x402
Gambit GPU Shop – Nemotron-3-Super 120B Chat (x402) is a paid API for AI agents from spark-2f53.tail8a7863.ts.net, paid per call via x402, $0.08/call, status unknown (last checked 2026-09-14).
Send a chat message array to the Nemotron-3-Super 120B model hosted on Gambit's GPU shop and receive an assistant reply, billed at $0.08 USDC per call via x402 on Base.
Price / call$0.08
Success—
StatusUnknown
How this service works
Gambit GPU shop. Pay with L402 Lightning on /l402/* or x402 USDC on Base on /x402/*. Handwritten letter POST /x402/letter at $25.00 USDC. Funnel https://spark-2f53.tail8a7863.ts.net/gambit. Cheap probe GET|POST /x402/models at $0.01 USDC.
Output
A JSON object containing the model identifier ('nemotron-3-super:120b-a12b') and a message object with role 'assistant' and the generated text content as a string.
Example use cases
On-demand LLM reasoning for agent pipelines
“I need a powerful model to reason through this multi-step logic problem: 'A train leaves city A at 60 mph, another leaves city B at 80 mph — if the cities are 280 miles apart, when do they meet?' Send it to the Nemotron 120B model and give me the answer in under 512 tokens.”
Generating structured summaries from long text
“Summarize this technical document excerpt into three bullet points using the Nemotron-3-Super model: 'Quantum computing leverages superposition and entanglement to perform computations that classical bits cannot efficiently replicate…' Keep it concise, max 300 tokens.”
Creative writing assistance with a large model
“Ask the Gambit Nemotron 120B chat model to write a short, punchy product description for a standing desk called 'VertexDesk Pro' — target young professionals, tone should be energetic, limit to 200 tokens.”
Technical details
Endpoint
POSThttps://spark-2f53.tail8a7863.ts.net/gambit/x402/chat/nemotronWhen to prefer
Choose this endpoint when you need access to a very large (120B parameter) NVIDIA Nemotron model via a pay-per-call USDC micropayment model on Base (x402 protocol), without a subscription. Prefer it over OpenAI or Anthropic APIs when you specifically want Nemotron-3-Super architecture, want to pay in stablecoin per request, or are building agents that need programmatic x402 payment flows. It is less suitable if you need streaming responses, function calling, or SLA guarantees from a major cloud provider.
Side effects
- 402 Payment Required if x402 USDC payment on Base is not attached or insufficient
- Invalid messages array (missing role or content fields) causes a 400 error
- max_tokens value out of range may be rejected or silently capped
- Model overload or GPU unavailability may cause timeouts or 503 errors
- Malformed JSON body returns a parse error
- Network routing issues to Tailscale endpoint (ts.net) may cause connection failures
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| messages | array | |
| max_tokens | integer |
Output
Schema · Response
{
"type": "json",
"example": {
"model": "nemotron-3-super:120b-a12b",
"message": {
"role": "assistant",
"content": "Hi."
}
}
}Tags
x402
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