# X402-NVIDIA Gemma-3N-E4B Chat Completions

> X402-NVIDIA Gemma-3N-E4B Chat Completions is a paid API for AI agents from x402-nvidia.vercel.app, paid per call via x402, $0.106113/call, status unknown (last checked 2026-09-14).

Run Google Gemma-3N-E4B inference via NVIDIA NIM, billed per-call using x402 USDC micropayments

## Facts

- Endpoint: POST https://x402-nvidia.vercel.app/api/gemma-3n-e4b
- Price: $0.106113/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-gemma-3n-e4b-chat-completions-5e98ae4d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_X3svcMtz2Ep7IsovNNjqa

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-gemma-3n-e4b-chat-completions-5e98ae4d -d '<json body>'
```

Example prompt: Use the NVIDIA NIM Gemma-3N-E4B model to answer this question: 'What are three practical tips for improving focus while working from home?' — charge per call via x402.

## When to prefer this

Choose this endpoint when you specifically want to run Google Gemma-3N-E4B inference on NVIDIA NIM hardware and want to pay per-call in USDC via x402 micropayments without managing API keys or subscriptions — ideal for agents needing lightweight, efficient Gemma generation with crypto-native billing.

## Known failure modes

- Payment failure or insufficient USDC balance causing x402 rejection
- Invalid or malformed message array in request body
- Model unavailable or NVIDIA NIM backend timeout
- Rate limiting on the Vercel-hosted proxy layer
- Unsupported input format returning a 400 error

## How this service works

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

## Output

A chat completion response containing an array of choices, each with a message object that includes the assistant role and generated content text from the Gemma-3N-E4B 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-gemma-3n-e4b-chat-completions-5e98ae4d/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)