# X402-NVIDIA Stockmark-2-100B Chat Completions

> X402-NVIDIA Stockmark-2-100B Chat Completions is a paid API for AI agents from x402-nvidia.vercel.app, paid per call via x402, $0.152316/call, status unknown (last checked 2026-09-15).

Runs inference on the Stockmark-2-100B large language model via NVIDIA NIM, billed per call using x402 USDC micropayments

## Facts

- Endpoint: POST https://x402-nvidia.vercel.app/api/stockmark-2-100b
- Price: $0.152316/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-stockmark-2-100b-chat-completions-81739c88
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6hSsLsdVFAu8uIgK_7H1v

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-stockmark-2-100b-chat-completions-81739c88 -d '<json body>'
```

Example prompt: Using the Stockmark-2-100B model on NVIDIA NIM, generate a professional Japanese business summary of the following quarterly earnings report — pay the per-call fee automatically: 'Q3 revenue increased 15% YoY driven by strong domestic demand.'

## When to prefer this

Choose this endpoint when you specifically need the Stockmark-2-100B model (a large Japanese-oriented business language model) and want pay-per-call access without a subscription, using x402 USDC micropayments. Prefer it when your workflow requires automated, programmable payments tied directly to each inference call.

## Known failure modes

- Payment failure or insufficient USDC balance — x402 payment not accepted, request blocked
- Model overload or NVIDIA NIM backend unavailability — 503 or timeout
- Malformed input schema — missing or invalid messages array returns 400
- Rate limiting on the Vercel deployment — 429 Too Many Requests
- Network errors reaching the Vercel-hosted proxy endpoint

## How this service works

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

## Output

Returns a chat completion object with a choices array containing the assistant's generated message, including role and content fields, mirroring the OpenAI chat completion response 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-stockmark-2-100b-chat-completions-81739c88/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)