# x402engine MiMo-V2.6-Pro LLM API

> x402engine MiMo-V2.6-Pro LLM API is a paid API for AI agents from x402engine.app, paid per call via x402, $0.004413/call, status unknown (last checked 2026-10-16).

Runs inference on Xiaomi's MiMo-V2.6-Pro 1T+ parameter foundation model via pay-per-call micropayments

## Facts

- Endpoint: POST https://x402engine.app/api/llm/mimo-v2.6-pro?utm_source=zero.xyz
- Price: $0.004413/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402engine-mimo-v2-6-pro-llm-api-2f2f9955
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4UqLjaW8QHzuhMLlsZw8z

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 x402engine-mimo-v2-6-pro-llm-api-2f2f9955 -d '<json body>'
```

Example prompt: Ask MiMo-V2.6-Pro to reason through this multi-step math problem step by step: 'A train leaves Chicago at 9am traveling at 80mph toward New York (790 miles away). Another train leaves New York at 11am at 100mph. At what time and location do they meet?' Stream the response back to me.

## When to prefer this

Choose this endpoint when you need a very large (1T+ parameter) frontier model for demanding reasoning, coding, or long-context tasks and want pay-per-call pricing without a monthly subscription. Prefer MiMo-V2.6-Pro specifically when working with Xiaomi's model ecosystem or when benchmarks show it outperforms other available models for your task. Use x402engine's version when you want OpenAI-compatible function calling and streaming with USDC micropayment settlement via x402 protocol.

## Known failure modes

- Payment not settled — 402 response if USDC micropayment fails
- Invalid messages format — 422 validation error if required 'messages' array is missing or malformed
- Unsupported parameter values — model may ignore or error on out-of-range top_p/top_k/min_p values
- Context length exceeded — very long message arrays may be truncated or rejected
- Streaming not available — SSE may fail if payment settlement hasn't completed before stream starts
- Tool call format errors — malformed function definitions cause schema validation failures

## How this service works

x402engine — MiMo-V2.6-Pro is the flagship foundation model developed by Xiaomi. Built at a scale of over 1T parameters, it is designed to push the ceiling of capability for the most demanding...

## Output

Returns an OpenAI-compatible JSON response containing the model name ('xiaomi/mimo-v2.6-pro'), a choices array with the assistant message (role, content, tool_calls if any), a finish_reason ('stop', 'tool_calls', etc.), and a top-level content field. Streaming mode returns SSE events in OpenAI format.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "bodyType",
    "body",
    "method"
   ],
   "properties": {
    "body": {
     "type": "object",
     "required": [
      "messages"
     ],
     "properties": {
      "seed": {
       "type": "integer",
       "description": "Model-supported seed; see /docs/llm-capabilities.md."
      },
      "stop": {
       "oneOf": [
        {
         "type": "string"
        },
        {
         "type": "array",
         "items": {
          "type": "string"
         },
         "maxItems": 4
        }
       ],
       "description": "Model-supported stop; see /docs/llm-capabilities.md."
      },
      "min_p": {
       "type": "number",
       "description": "Model-supported min_p; see /docs/llm-capabilities.md."
      },
      "tools": {
       "type": "array",
       "items": {
        "type": "object",
        "required": [
         "function"
        ],
        "properties": {
         "type": {
          "enum": [
           "function"
          ],
          "type": "string"
         },
         "function": {
          "type": "object",
          "properties": {
           "name": {
            "type": "string"
           },
           "strict": {
            "type": "boolean"
           },
           "parameters": {
            "type": "object"
           },
           "description": {
            "type": "string"
           }
          }
         }
        }
       },
       "description": "Client-executed function definitions; return results using role=tool and tool_call_id."
      },
      "top_k": {
       "type": "integer",
       "description": "Model-supported top_k; see /docs/llm-capabilities.md."
      },
      "top_p": {
       "type": "number",
       "description": "Model-supported top_p; see /docs/llm-capabilities.md."
      },
      "stream": {
       "type": "boolean",
       "description": "Return live OpenAI-compatible SSE after payment settlement."
      },
      "messages": {
       "type": "array",
       "items": {
        "type": "object",
        "anyOf": [
         {
          "required": [
           "content"
          ]
         },
         {
          "required": [
           "tool_calls"
          ]
         }
        ],
        "required": [
         "role"
        ],
        "properties": {
         "name": {
          "type": "string"
… (truncated)
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "model": "xiaomi/mimo-v2.6-pro",
  "choices": [
   {
    "index": 0,
    "message": {
     "role": "assistant",
     "content": "Hello!"
    },
    "finish_reason": "stop"
   }
  ],
  "content": "Hello!"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402engine-mimo-v2-6-pro-llm-api-2f2f9955/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402engine.app](https://www.zero.xyz/host/x402engine.app/llms.txt)