OpenAI Chat Completions

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OpenAI Chat Completions is a paid API for AI agents from OpenAI at openai.mpp.tempo.xyz, paid per call via MPP, $0.005125/call, status unknown (last checked 2026-10-10).

Sends a multi-turn conversation to OpenAI GPT-4o, GPT-4, o1, and other models and returns a text completion response

Price / call$0.005125

Seller volume →—

Success—

StatusUnknown

How this service works

Chat completions (GPT-4o, GPT-4, o1, etc.) - price varies by model

Output

Returns a chat completion object containing the assistant's generated message text, the model version used, token usage breakdown (prompt, completion, total), finish reason, and a unique completion ID.

Example use cases

Example prompt

“Ask GPT-4o to explain how transformer neural networks work, using a system prompt that says 'You are an expert ML educator', with a max of 300 tokens and temperature 0.7.”

Technical details

Endpoint

POSThttps://openai.mpp.tempo.xyz/v1/chat/completions?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need high-quality conversational AI responses from OpenAI's flagship models (GPT-4o, GPT-4, o1) via a pay-per-call USDC-priced gateway. Ideal for agents that need flexible multi-turn chat, instruction-following, reasoning, summarization, or text extraction without managing OpenAI API keys directly. Prefer this over the Responses API when the standard Chat Completions interface is sufficient.

Side effects

Invalid or unsupported model name returns a 400 or 404 error
Exceeding the model's context window token limit returns a 400 error
Malformed messages array or missing required fields returns a 422 validation error
Rate limit or quota exceeded returns a 429 error
Upstream OpenAI service outage returns a 503 or 502 error
Empty or missing model field causes request rejection

Input

{
  "model": "gpt-4o",
  "messages": [
    {
      "role": "user",
      "content": "Say hi."
    }
  ]
}

Output

{
  "id": "chatcmpl-DkgHTauDrpphVZC5cEY2Fh2ipQR7B",
  "model": "gpt-4o-2024-08-06",
  "usage": {
    "total_tokens": 19,
    "prompt_tokens": 10,
    "completion_tokens": 9,
    "prompt_tokens_details": {
      "audio_tokens": 0,
      "cached_tokens": 0
    },
    "completion_tokens_details": {
      "audio_tokens": 0,
      "reasoning_tokens": 0,
      "accepted_prediction_tokens": 0,
      "rejected_prediction_tokens": 0
    }
  },
  "object": "chat.completion",
  "choices": [
    {
      "index": 0,
      "message": {
        "role": "assistant",
        "content": "Hello! How can I assist you today?",
        "refusal": null,
        "annotations": []
      },
      "logprobs": null,
      "finish_reason": "stop"
    }
  ],
  "created": 1780017987,
  "service_tier": "default",
  "system_fingerprint": "fp_99b75f7468"
}

Reviews

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Technical details

Endpoint

POSThttps://openai.mpp.tempo.xyz/v1/chat/completions?utm_source=zero.xyz

When to prefer

Side effects

Invalid or unsupported model name returns a 400 or 404 error
Exceeding the model's context window token limit returns a 400 error
Malformed messages array or missing required fields returns a 422 validation error
Rate limit or quota exceeded returns a 429 error
Upstream OpenAI service outage returns a 503 or 502 error
Empty or missing model field causes request rejection

Input

{
  "model": "gpt-4o",
  "messages": [
    {
      "role": "user",
      "content": "Say hi."
    }
  ]
}

Output

{
  "id": "chatcmpl-DkgHTauDrpphVZC5cEY2Fh2ipQR7B",
  "model": "gpt-4o-2024-08-06",
  "usage": {
    "total_tokens": 19,
    "prompt_tokens": 10,
    "completion_tokens": 9,
    "prompt_tokens_details": {
      "audio_tokens": 0,
      "cached_tokens": 0
    },
    "completion_tokens_details": {
      "audio_tokens": 0,
      "reasoning_tokens": 0,
      "accepted_prediction_tokens": 0,
      "rejected_prediction_tokens": 0
    }
  },
  "object": "chat.completion",
  "choices": [
    {
      "index": 0,
      "message": {
        "role": "assistant",
        "content": "Hello! How can I assist you today?",
        "refusal": null,
        "annotations": []
      },
      "logprobs": null,
      "finish_reason": "stop"
    }
  ],
  "created": 1780017987,
  "service_tier": "default",
  "system_fingerprint": "fp_99b75f7468"
}