# MiniMax M3 Chat Completions via x402 Payment Gateway

> MiniMax M3 Chat Completions via x402 Payment Gateway is a paid API for AI agents from agent402-arb.rosariovitale0096.workers.dev, paid per call via x402, $0.0014/call, status unknown (last checked 2026-10-15).

Sends a chat completion request to the MiniMax M3 model using an OpenAI-compatible API, paid per-request in USDC on Base via x402 with no account or API key required.

## Facts

- Endpoint: POST https://agent402-arb.rosariovitale0096.workers.dev/llm/minimax-m3?utm_source=zero.xyz
- Price: $0.0014/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/minimax-m3-chat-completions-via-x402-payment-gateway-ea53a35b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2hARdptrL5QVb1zTtHnNG

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 minimax-m3-chat-completions-via-x402-payment-gateway-ea53a35b -d '<json body>'
```

Example prompt: Send this conversation to MiniMax M3 and get a response: system prompt is 'You are a helpful assistant', user message is 'Explain quantum entanglement in two sentences' — pay the per-request fee in USDC automatically.

## When to prefer this

Choose this endpoint when you need MiniMax M3 specifically (known for strong multilingual and long-context capabilities) and want a no-account, no-API-key setup using crypto micropayments. Ideal for AI agents in Web3-native pipelines that already handle x402/USDC payments, or for developers who want to experiment with MiniMax M3 without signing up for any service. Prefer alternatives (e.g. direct MiniMax or OpenRouter) if you need streaming responses, fine-tuned models, or fiat billing.

## Known failure modes

- Payment failure if USDC balance is insufficient or x402 payment header is malformed
- 400 Bad Request if the request body does not conform to the OpenAI chat completions schema
- Model unavailable or gateway timeout if the MiniMax M3 backend is unreachable
- Rate limiting or quota errors from the underlying model provider
- Invalid bodyType or method enum causes schema validation failure at gateway level

## How this service works

LLM inference API: OpenAI-compatible chat completions for 136 AI models (Claude, GPT, Gemini, Grok, DeepSeek, Qwen, Kimi, GLM), paid per call in USDC on Base with x402. No account, no API key, automatic refund if the model fails.

## Output

Returns an OpenAI-compatible chat completion JSON object containing the assistant's reply text, role, finish reason (e.g. 'stop'), token usage breakdown (prompt, completion, total), model identifier ('minimax/minimax-m3'), and a unique completion ID.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "model": {
   "type": "string",
   "description": "Optional: fixed by the route (minimax/minimax-m3)"
  },
  "tools": {
   "type": "array"
  },
  "stream": {
   "type": "boolean",
   "description": "true: server-sent events after payment"
  },
  "messages": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "role"
    ],
    "properties": {
     "role": {
      "enum": [
       "system",
       "user",
       "assistant",
       "tool",
       "developer"
      ],
      "type": "string"
     },
     "content": {
      "type": [
       "string",
       "array",
       "null"
      ]
     }
    }
   },
   "minItems": 1
  },
  "max_tokens": {
   "type": "integer",
   "maximum": 16384,
   "minimum": 1,
   "description": "Optional, default 4096"
  },
  "temperature": {
   "type": "number",
   "maximum": 2,
   "minimum": 0
  },
  "response_format": {
   "type": "object"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "id": "chatcmpl-7f3c2a91",
  "model": "minimax/minimax-m3",
  "usage": {
   "total_tokens": 10,
   "prompt_tokens": 9,
   "completion_tokens": 1
  },
  "object": "chat.completion",
  "choices": [
   {
    "index": 0,
    "message": {
     "role": "assistant",
     "content": "OK"
    },
    "finish_reason": "stop"
   }
  ],
  "created": 1791979200
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/minimax-m3-chat-completions-via-x402-payment-gateway-ea53a35b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent402-arb.rosariovitale0096.workers.dev](https://www.zero.xyz/host/agent402-arb.rosariovitale0096.workers.dev/llms.txt)