# MiniChan Reasoning Endpoint — NVIDIA NIM MiniMax-M3

> MiniChan Reasoning Endpoint — NVIDIA NIM MiniMax-M3 is a paid API for AI agents from minichan.vercel.app, paid per call via x402, $0.15/call, status unknown (last checked 2026-09-15).

Performs deep step-by-step reasoning on complex problems or questions using the MiniMax-M3 428B MoE model via NVIDIA NIM, paid with USDC on Base via x402.

## Facts

- Endpoint: POST https://minichan.vercel.app/api/reasoning
- Price: $0.15/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/minichan-reasoning-endpoint-nvidia-nim-minimax-m3-bfaad234
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_oF_2jiVII6oI5txrEA3kh

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 minichan-reasoning-endpoint-nvidia-nim-minimax-m3-bfaad234 -d '<json body>'
```

Example prompt: Walk me step-by-step through why the Monty Hall problem gives a 2/3 probability of winning if you switch — I want the full chain-of-thought reasoning, not just the answer.

## When to prefer this

Choose this endpoint when you need deep, step-by-step chain-of-thought reasoning rather than a direct answer — ideal for math problems, logical puzzles, complex technical questions, root cause analysis, or multi-step inference. Prefer this over the general text endpoint when the problem structure requires intermediate reasoning steps to be surfaced. The 428B MoE model provides high-quality reasoning at a fixed cost of $0.15 USDC per call via x402 on Base.

## Known failure modes

- Missing required 'prompt' field returns a 400 validation error
- Payment not sent or insufficient USDC via x402 returns a 402 Payment Required
- Model timeout on extremely long or complex prompts may result in a 504 or truncated response
- Vague or ambiguous prompts may yield shallow reasoning rather than deep chain-of-thought
- Rate limiting or quota exceeded returns a 429 error

## How this service works

NVIDIA NIM MiniMax-M3 (428B MoE) powered API for AI agents. 15 multimodal endpoints — text, vision, code, reasoning, creative. Pay with USDC on Base via x402.

## Output

A structured response containing step-by-step reasoning and a final answer or conclusion derived from the MiniMax-M3 428B MoE model, surfacing the chain-of-thought logic applied to the input problem.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "prompt"
 ],
 "properties": {
  "prompt": {
   "type": "string",
   "description": "Problem or question requiring step-by-step reasoning"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/minichan-reasoning-endpoint-nvidia-nim-minimax-m3-bfaad234/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from minichan.vercel.app](https://www.zero.xyz/host/minichan.vercel.app/llms.txt)