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ds402 — DeepSeek Flash pay-per-call via x402
x402
ds402 — DeepSeek Flash pay-per-call via x402 is a paid API for AI agents from ds.xhclco.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-11-04).
Serves DeepSeek Flash chat completions on a pay-per-call basis using x402 micropayments — no API keys or accounts required, just $0.01 USDC per request.
Price / call$0.01
Success—
StatusUnknown
How this service works
Pay-per-request DeepSeek inference behind an x402 payment wall. No accounts, no API keys: POST OpenAI-style chat completions, receive HTTP 402 with an x402 v2 challenge, settle $0.01 (flash) or $0.04 (v4-pro) in USDC on Base, get the completion. One payment per call.
Output
Returns an OpenAI-compatible chat completion object containing the assistant's message content, finish reason, and token usage counts. Streaming is not supported; the full response is returned synchronously after the x402 payment is settled.
Example use cases
One-off LLM call without account
“I need a quick answer from DeepSeek Flash — ask it to explain the difference between TCP and UDP in simple terms. Pay the $0.01 per-call fee in USDC on Base, no API key needed, and return what it says. Use up to 300 tokens.”
Crypto-native agent reasoning step
“My autonomous agent needs to classify this customer support ticket as 'billing', 'technical', or 'general' — send that classification task as a message to the DeepSeek Flash pay-per-call endpoint with a max of 256 tokens, settle the $0.01 USDC fee on Base, and return the result.”
Serverless LLM call in a pipeline
“In my no-account inference pipeline, call DeepSeek Flash with the prompt 'Write a one-paragraph product description for wireless noise-cancelling headphones', pay $0.01 USDC on Base via x402, cap output at 400 tokens, and send me back the completion.”
Technical details
Endpoint
POSThttps://ds.xhclco.com/v1/flash/completions?utm_source=zero.xyzWhen to prefer
Prefer this endpoint when you need a one-off or low-volume DeepSeek Flash inference call and want to avoid account creation, API key management, or monthly subscriptions. Ideal for crypto-native agents, serverless pipelines, or agentic workflows where per-call USDC micropayments on Base are acceptable. Not suitable for high-volume inference (cost adds up vs. subscription), streaming use cases, or scenarios requiring models other than DeepSeek Flash.
Side effects
- HTTP 402 returned if x402 payment challenge not satisfied — agent must detect and handle the payment flow before retrying
- max_tokens clamped to [128, 2048] — requests outside this range are silently adjusted, potentially truncating long outputs
- Streaming (stream: true) is not supported and will fail or be ignored — must use non-streaming mode
- Empty or truncated content if max_tokens is set below 256, since the model performs reasoning before outputting text
- Payment settlement failure on Base network (e.g. insufficient USDC balance, wrong chain) results in no completion being returned
- Model parameter is ignored — always uses deepseek-flash, so callers expecting a different model will silently get flash
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| model | string | ignored, pinned to deepseek-flash by route |
| stream | boolean | must be false; SSE streaming unsupported |
| messagesrequired | array | |
| max_tokens | integer | clamped to [128,2048]; model does reasoning, use >=256 to avoid empty content |
| temperature | number |
Tags
x402
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