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x402donghang Qwen-3.8-Max Chat Completions
x402
x402donghang Qwen-3.8-Max Chat Completions is a paid API for AI agents from x402donghang.duckdns.org, paid per call via x402, $0.012/call, status down (last checked 2026-09-15).
Provides OpenAI-compatible chat completions using the Qwen-3.8-Max model, payable per-call in USDC via x402 with no signup required.
Price / call$0.012
Success—
StatusDown
How this service works
Fresh crypto narrative research with market context and verifiable source URLs. Free BTC sample; custom radar $0.02/call via x402 USDC.
Output
Returns an OpenAI-compatible chat completion JSON object with an 'id', 'model', 'object', and a 'choices' array containing the assistant's message content and finish reason.
Example use cases
On-demand LLM for agentic pipeline
“Use Qwen-3.8-Max to classify the following customer support ticket as 'billing', 'technical', or 'general' and give a one-sentence suggested reply: 'My invoice shows a double charge from last month.'”
No-signup code explanation
“I need Qwen-3.8-Max to explain this Python function to me in plain English — no account setup, just pay per call: def fib(n): return n if n <= 1 else fib(n-1) + fib(n-2)”
Crypto analysis reasoning task
“Have the Qwen 3.8 Max model summarize the key risks and opportunities for a DeFi protocol launching on Ethereum in 2025, in about 200 words.”
Technical details
Endpoint
POSThttps://x402donghang.duckdns.org/x402/v1/models/qwen-3.8-max/chat/completionsWhen to prefer
Choose this endpoint when you need Qwen-3.8-Max specifically, want a pay-per-call model with no monthly subscription, need OpenAI-compatible API shape for drop-in compatibility, or are building an agent that uses USDC micropayments via x402 for LLM inference.
Side effects
- 402 Payment Required if USDC payment via x402 is missing or insufficient
- Invalid model name returns error — must use exactly 'qwen-3.8-max'
- Malformed messages array (missing role or content) causes a 400 error
- Streaming errors if stream:true is set but client doesn't handle SSE
- Service unavailability due to self-hosted duckdns infrastructure downtime
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| model | string | Use "qwen-3.8-max" |
| stream | boolean | |
| messages | array | |
| max_tokens | number |
Output
Schema · Response
{
"type": "json",
"example": {
"id": "chatcmpl-x402",
"model": "qwen-3.8-max",
"object": "chat.completion",
"choices": [
{
"index": 0,
"message": {
"role": "assistant",
"content": "Hello!"
},
"finish_reason": "stop"
}
]
}
}Tags
x402
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