# X402-NVIDIA Ministral-14B Chat Completions

> X402-NVIDIA Ministral-14B Chat Completions is a paid API for AI agents from x402-nvidia.vercel.app, paid per call via x402, $0.172128/call, status unknown (last checked 2026-09-15).

Run inference on NVIDIA's Ministral-14B language model via a pay-per-call x402 micropayment gateway

## Facts

- Endpoint: POST https://x402-nvidia.vercel.app/api/ministral-14b
- Price: $0.172128/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-nvidia-ministral-14b-chat-completions-1f3834d6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8I5DCCLtkPXN4VMs-Rfci

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-ministral-14b-chat-completions-1f3834d6 -d '<json body>'
```

Example prompt: Use the NVIDIA NIM Ministral-14B model to answer this question: 'Explain the difference between supervised and unsupervised machine learning in simple terms' — pay per call with USDC.

## When to prefer this

Choose this endpoint when you need access to the Ministral-14B model specifically (a mid-large Mistral-family model) without long-term API subscriptions, paying only per call via USDC micropayments through the x402 protocol. Ideal for agents that need on-demand, crypto-native LLM inference without managing API keys or billing accounts.

## Known failure modes

- Payment failure: x402 micropayment not fulfilled or insufficient USDC balance, returns 402 Payment Required
- Model overload: NVIDIA NIM backend at capacity, returns 503 or timeout
- Malformed input: missing or invalid messages array, returns 400 Bad Request
- Rate limit exceeded on the gateway layer, returns 429 Too Many Requests
- Cold start latency on Vercel serverless function causes timeout for very long prompts

## How this service works

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

## Output

A chat completion object containing an array of choices, each with an assistant message object holding the role and generated text content from the Ministral-14B model.

## 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-ministral-14b-chat-completions-1f3834d6/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)