# Maximus Media House Chat Completions (Qwen3.5)

> Maximus Media House Chat Completions (Qwen3.5) is a paid API for AI agents from agent.maximusmediahouse.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-31).

Provides chat completions using the Qwen3.5 language model via a flat-rate pay-per-call API endpoint

## Facts

- Endpoint: POST https://agent.maximusmediahouse.com/v1/chat/completions?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/maximus-media-house-chat-completions-qwen3-5-cf95c02a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ONulsLWuaUEotvucoe7-y

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 maximus-media-house-chat-completions-qwen3-5-cf95c02a -d '<json body>'
```

Example prompt: Use the Qwen3.5 model to answer this question for me: 'What are the main differences between supervised and unsupervised machine learning?' — keep the response concise with a max of 512 tokens and a temperature of 0.7.

## When to prefer this

Choose this endpoint when you need a flat-rate ($0.003/call regardless of token count), OpenAI-compatible chat completions API backed by Qwen3.5, especially useful for short-to-medium interactions where token-based billing would be unpredictable or expensive. Prefer it when integrating into agent pipelines that support x402 micropayments and need a cost-predictable LLM call. It is a good fit when Qwen3.5's reasoning style is preferred over GPT or Claude models.

## Known failure modes

- Missing required 'messages' array returns a validation error
- Empty messages array (minItems violation) causes a 400 error
- Invalid model name (only 'qwen3.5' is accepted) causes rejection
- Payment failure via x402 protocol blocks the request
- Exceeding max_tokens limit returns a truncated response
- Malformed message role (must be system/user/assistant) causes schema validation failure
- Streaming mode may not be fully supported depending on client implementation

## Output

Returns a chat completion response object in OpenAI-compatible format, containing the assistant's generated text message, the model used (qwen3.5), token usage details, and finish reason. The response follows the standard /v1/chat/completions response schema.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "required": [
      "model",
      "messages"
     ],
     "properties": {
      "model": {
       "enum": [
        "qwen3.5"
       ],
       "type": "string"
      },
      "stream": {
       "type": "boolean",
       "default": false
      },
      "messages": {
       "type": "array",
       "items": {
        "type": "object",
        "required": [
         "role",
         "content"
        ],
        "properties": {
         "role": {
          "enum": [
           "system",
           "user",
           "assistant"
          ],
          "type": "string"
         },
         "content": {
          "type": "string"
         }
        }
       },
       "minItems": 1
      },
      "max_tokens": {
       "type": "integer",
       "default": 1024,
       "minimum": 1,
       "description": "Output cap. Chat is billed FLAT $0.003/call, not per token."
      },
      "temperature": {
       "type": "number",
       "default": 0.7,
       "maximum": 2,
       "minimum": 0
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/maximus-media-house-chat-completions-qwen3-5-cf95c02a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent.maximusmediahouse.com](https://www.zero.xyz/host/agent.maximusmediahouse.com/llms.txt)