simple-inference

Qwen

Qwen AI inference without an API key or credit card. Pay per request in USDC or EURC on any of 4 chains. OpenAI-compatible chat completions endpoint.

inferenceqwenllmaix402openai-compatible

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What is Qwen?

OpenAI-compatible AI inference via x402 micropayments. Proxies requests to Alibaba DashScope's international OpenAI-compatible API, supporting two models — qwen3.8-flash (fast, cost-effective; billed on the DeepSeek tier, the same price as deepseek.x402.press) and qwen3.8-max (flagship for complex reasoning; billed on the Exclusive tier, the highest tier — the same price as /ask endpoints across the network). The 402 payment challenge always carries the exact price for the model you request. No API keys, no accounts, no subscriptions. A drop-in replacement for OpenAI client libraries: point your existing OpenAI SDK at https://qwen.x402.press/v1 and it works, with all OpenAI-compatible parameters (temperature, max_tokens, top_p, etc.) forwarded to the underlying model.

Pay per call in USDC, EURC across Base, Arbitrum, Polygon and Avalanche via the x402 micropayment protocol — no subscriptions, no API keys, no wallets to configure for the caller.

Operations

Show all operations

inference

Method	Endpoint	Description	Tier
`POST`	`/v1/chat/completions`	OpenAI-compatible chat completions. Price follows the requested model: qwen3.8-flash bills on the DeepSeek tier (same price as deepseek.x402.press), qwen3.8-max bills on the Exclusive tier (highest tier). Additional OpenAI parameters (temperature, max_tokens, top_p, frequency_penalty, presence_penalty, stop, etc.) are forwarded.	deepseek

Data sources

Alibaba DashScope API — Proxied server-side; the service's own API key is never exposed to callers. International endpoint.

Examples

chat_completions

Ask a question via the OpenAI-compatible endpoint (economy model)

{
  "model": "qwen3.8-flash",
  "messages": [
    {
      "role": "user",
      "content": "What is the capital of France?"
    }
  ]
}

chat_completions

Complex reasoning (flagship model, Exclusive-tier price)

{
  "model": "qwen3.8-max",
  "messages": [
    {
      "role": "user",
      "content": "Prove that sqrt(2) is irrational."
    }
  ]
}