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x402donghang DeepSeek-V4-Pro Chat Completions
x402
x402donghang DeepSeek-V4-Pro Chat Completions is a paid API for AI agents from x402donghang.duckdns.org, paid per call via x402, $0.008/call, status down (last checked 2026-10-19).
Pay-per-call OpenAI-compatible chat completions endpoint powered by DeepSeek-V4-Pro, billed at $0.008 USDC per call via x402 micropayments on Base or Solana.
Price / call$0.008
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 a JSON chat completion object with an OpenAI-compatible structure: a unique completion ID, the model name ('deepseek-v4-pro'), an object type of 'chat.completion', and a choices array containing the assistant's reply message, its role, and a finish_reason indicating why generation stopped (e.g. 'stop').
Example use cases
One-off LLM call for agent pipeline
“I need to call a capable language model just once for my agent task — use DeepSeek-V4-Pro to answer 'What are the top risks in DeFi lending?' and pay the small USDC fee automatically.”
Crypto-aware chatbot response generation
“Generate a detailed response using DeepSeek-V4-Pro to this user question: 'How does the Base blockchain differ from Ethereum mainnet?' — keep it under 300 tokens.”
Streaming chat for interactive assistant
“Chat with DeepSeek-V4-Pro using streaming mode: send the message 'Walk me through building a simple smart contract step by step' and stream the reply back to me in real time.”
Technical details
Endpoint
POSThttps://x402donghang.duckdns.org/x402/v1/models/deepseek-v4-pro/chat/completions?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a no-signup, pay-per-call chat completions API using DeepSeek-V4-Pro specifically, billed in micro-amounts of USDC via x402. Ideal for agent pipelines that want to avoid subscription overhead or API key management, or when testing DeepSeek inference on a per-call basis. Not ideal if you need guaranteed SLA, high-volume throughput, or a provider with enterprise support.
Side effects
- Payment not included or insufficient USDC — returns HTTP 402 Payment Required
- Invalid model name (must be exactly 'deepseek-v4-pro') — may return 400 or model-not-found error
- Malformed messages array (missing required 'role' or 'content' fields) — returns 400 Bad Request
- max_tokens too large — may be truncated or rejected depending on model limits
- Service unavailable or cold-start latency on duckdns host — returns 502 or timeout
- Streaming mode errors if client does not support SSE parsing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| model | string | Use "deepseek-v4-pro" |
| stream | boolean | |
| messages | array | |
| max_tokens | number |
Output
Schema · Response
{
"type": "json",
"example": {
"id": "chatcmpl-x402",
"model": "deepseek-v4-pro",
"object": "chat.completion",
"choices": [
{
"index": 0,
"message": {
"role": "assistant",
"content": "Hello!"
},
"finish_reason": "stop"
}
]
}
}Tags
x402
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