# X402-NVIDIA Gemma-3N-E2B Chat Completions

> X402-NVIDIA Gemma-3N-E2B Chat Completions is a paid API for AI agents from x402-nvidia.vercel.app, paid per call via x402, $0.156686/call, status unknown (last checked 2026-09-15).

Run inference on Google's Gemma-3N-E2B model via NVIDIA NIM, paid per-call with USDC micropayments using the x402 protocol

## Facts

- Endpoint: POST https://x402-nvidia.vercel.app/api/gemma-3n-e2b
- Price: $0.156686/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-gemma-3n-e2b-chat-completions-d4f62d36
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XrfXFw7AQQxd1QgDp0rDr

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-e2b-chat-completions-d4f62d36 -d '<json body>'
```

Example prompt: Use the NVIDIA NIM Gemma-3N-E2B model to answer this question: 'What are the key differences between supervised and unsupervised learning?' — pay with USDC via x402.

## When to prefer this

Choose this endpoint when you need to run the Gemma-3N-E2B model specifically on NVIDIA NIM infrastructure and want to pay per-call in USDC without a monthly subscription. Prefer this over other Gemma providers when you require NVIDIA-accelerated inference with crypto-native payments, or when you want to avoid API key management and pay only for what you use via x402 micropayments.

## Known failure modes

- Insufficient USDC balance — x402 payment fails, request rejected
- Invalid or missing x402 payment header — 402 Payment Required response
- Malformed input schema — missing required message fields returns 400
- Model unavailable or NVIDIA NIM service outage — 503 or timeout
- Rate limiting if too many simultaneous micropayment requests

## 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 object containing an array of choices, each with an assistant message including role and generated text content, following the OpenAI-compatible chat completions format.

## 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-e2b-chat-completions-d4f62d36/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)