OpenAI o3-mini via mm.family (x402)

x402

OpenAI o3-mini via mm.family (x402) is a paid API for AI agents from openai.mm.family, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).

Runs OpenAI o3-mini reasoning model chat completions billed per-call in USDC via x402 micropayment protocol, with selectable reasoning effort levels (low/medium/high/xhigh).

Price / call$0.001

Seller volume →—

Success—

StatusUnknown

How this service works

o3-mini: OpenAI o3 Mini chat completions, paid per call in USDC. Per 1M tokens in/out: Standard (default) 1.1/4.4; pick with service_tier. Plus $0.0005 (Base) or $0.0005 (Solana) per call; the quote charges input plus 10% of max_tokens. Levels: low, medium, high, xhigh (model o3-mini:<level>). Empty answers are free. Rates: https://openai.mm.family/x402/pricing

Output

Returns a standard OpenAI-compatible chat completion JSON object containing the assistant's reply message, token usage breakdown (prompt, completion, total), finish reason, model used, and service tier applied.

Example use cases

Hard coding problem with deep reasoning

“I need o3-mini at xhigh reasoning level to debug this recursive algorithm — it's returning wrong results for edge cases. Here's the code: [paste]. Give me a detailed explanation and a fix, up to 1000 tokens.”

Fast low-cost reasoning for simple Q&A

“Use o3-mini on low reasoning effort to answer this quick question: what's the capital of Australia? Keep it under 50 tokens to save on costs.”

Structured JSON extraction from unstructured text

“Run o3-mini with medium reasoning to extract the company name, revenue, and founding year from this press release and return the result as a JSON object: [paste text here].”

Technical details

Endpoint

POSThttps://openai.mm.family/x402/v1/models/o3-mini/chat/completions?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need OpenAI's o3-mini reasoning model with selectable effort levels (low to xhigh) and want to pay per-call in USDC via x402 without maintaining an OpenAI API subscription. Ideal for agents that need trustless, on-chain-friendly AI inference, or for tasks requiring deep multi-step reasoning where GPT-4o-class models underperform.

Side effects

Insufficient USDC balance causes x402 payment failure before completion
max_tokens quota too low results in truncated output with finish_reason=length
Invalid model variant string (e.g. typo in o3-mini:level) returns 400 error
Empty or malformed messages array causes request rejection
Overloaded service tier may increase latency or return 503
Empty response (zero completion tokens) is billed as free

Input

Schema · Request body

Field	Type	Description
model	string
tools	array
stream	boolean
messages	array
max_tokens	integer
service_tier	string
response_format	object
reasoning_effort	string

Output

Schema · Response

{
  "type": "json",
  "example": {
    "id": "chatcmpl-x",
    "model": "o3-mini",
    "usage": {
      "total_tokens": 9,
      "prompt_tokens": 8,
      "completion_tokens": 1
    },
    "object": "chat.completion",
    "choices": [
      {
        "index": 0,
        "message": {
          "role": "assistant",
          "content": "Hello",
          "refusal": null
        },
        "finish_reason": "stop"
      }
    ],
    "service_tier": "default"
  }
}

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