# X402-NVIDIA Mistral Large 3 Chat Completions

> X402-NVIDIA Mistral Large 3 Chat Completions is a paid API for AI agents from x402-nvidia.vercel.app, paid per call via x402, $0.159201/call, status unknown (last checked 2026-09-14).

Runs inference on NVIDIA NIM's Mistral Large 3 model via x402 micropayment, returning chat completion responses.

## Facts

- Endpoint: POST https://x402-nvidia.vercel.app/api/mistral-large-3
- Price: $0.159201/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-nvidia-mistral-large-3-chat-completions-3e98f303
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qF6pmlQ_uDKwOp-UZApBI

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 x402-nvidia-mistral-large-3-chat-completions-3e98f303 -d '<json body>'
```

Example prompt: Using Mistral Large 3 on NVIDIA NIM, generate a detailed explanation of how transformer attention mechanisms work, written for a software engineer who is new to machine learning.

## When to prefer this

Choose this endpoint when you need Mistral Large 3 specifically via NVIDIA NIM infrastructure, want pay-per-call pricing via x402 USDC micropayments without a subscription, or are building an agent that needs on-demand LLM access with crypto-native payments rather than a standing API key contract.

## Known failure modes

- Payment fails or USDC balance insufficient — x402 payment rejected, no response returned
- Invalid or malformed message format — model returns error or empty choices
- Rate limiting or model unavailability on NVIDIA NIM backend — 503 or timeout
- Prompt too long for model context window — truncation or error response
- Network timeout to Vercel proxy — connection error

## How this service works

Access 48+ NVIDIA NIM AI models via x402 micropayments. Chat completions, vision, safety, translation, and more.

## Output

A JSON object with a 'choices' array containing the model's assistant message, including the role and generated content text from Mistral Large 3.

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "example": {
  "choices": [
   {
    "message": {
     "role": "assistant",
     "content": "Hello!"
    }
   }
  ]
 },
 "properties": {
  "choices": {
   "type": "array",
   "description": "Model responses"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-nvidia-mistral-large-3-chat-completions-3e98f303/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-nvidia.vercel.app](https://www.zero.xyz/host/x402-nvidia.vercel.app/llms.txt)