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agent402.tools LLM Premium Inference (o3/o3-mini)
x402
agent402.tools LLM Premium Inference (o3/o3-mini) is a paid API for AI agents from agent402.tools, paid per call via x402, $0.5/call, status unknown (last checked 2026-09-14).
Proxies requests to OpenAI o3 or o3-mini reasoning models with vision and structured output support, paid per-call via x402 micropayment protocol
Price / call$0.5
Success—
StatusUnknown
How this service works
LLM inference proxy (Premium tier) - o3 or o3-mini reasoning models. Supports vision (up to 2 image URLs) and structured output (response_format: json_object or json_schema). No API key needed; pay per call via x402. Input capped at 32k chars, output at 2048 tokens.
Output
Returns a completion response from the o3 or o3-mini model, optionally structured as a JSON object or validated against a provided JSON schema. Includes the generated text content and up to 2048 output tokens. Supports multi-turn message arrays with interleaved text and image inputs.
Example use cases
Example prompt
“Use the o3-mini reasoning model to analyze this image (https://example.com/chart.png) and return a JSON object with fields 'summary' and 'key_insights' — keep the output under 512 tokens.”
Technical details
Endpoint
POSThttps://agent402.tools/api/llm-premiumWhen to prefer
Choose this endpoint when you need OpenAI's o3 or o3-mini reasoning models without managing your own OpenAI API key or billing, and want to pay per-call via x402. Ideal for agent workflows that need occasional high-quality reasoning or vision analysis without a subscription. Prefer over the standard tier when you need o3's deeper chain-of-thought reasoning. Choose over self-hosted alternatives when you want zero credential management.
Side effects
- Payment not attached or insufficient USDC — x402 payment required before response is served
- Input exceeds 32k character cap — request rejected
- max_tokens exceeds 2048 cap — clamped or rejected
- Invalid model ID (not 'o3' or 'o3-mini') — model not found error
- Malformed image URL or more than 2 image URLs provided — vision input error
- Invalid response_format schema — structured output generation fails
- Model timeout on complex reasoning tasks — upstream timeout returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| stop | string | Stop sequence(s) |
| model | string | Model ID - o3 or o3-mini |
| top_p | number | Nucleus sampling (0-1) |
| messages | array | Array of {role, content} objects. content can be a string or array of {type:'text',text} and {type:'image_url',image_url:{url,detail}} blocks |
| max_tokens | number | Max output tokens (default 1024, cap 2048) |
| temperature | number | Sampling temperature (0-2) |
| response_format | object | Optional: {type:"json_object"} or {type:"json_schema",json_schema:{name,schema}} |
Output
Schema · Response
{
"type": "json",
"example": {
"model": "o3-mini",
"usage": {
"total_tokens": 20,
"prompt_tokens": 12,
"completion_tokens": 8
},
"choices": [
{
"message": {
"role": "assistant",
"content": "Hello! How can I help you today?"
},
"finish_reason": "stop"
}
],
"provider": "openai"
}
}Tags
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