# Arysphere Base DeepSeek Chat Completion

> Arysphere Base DeepSeek Chat Completion is a paid API for AI agents from api.arysphere.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-26).

OpenAI-style LLM chat completion using DeepSeek-V4-Flash-0731, accepting a message array and returning the assistant reply with token usage

## Facts

- Endpoint: POST https://api.arysphere.com/v1/ventures/x402_bazaar_token_verdict_v2/base_deepseek_chat?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-26
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/arysphere-base-deepseek-chat-completion-cf6560ec
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_sRI2k9NLt5hIRfU3z3ocZ

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability arysphere-base-deepseek-chat-completion-cf6560ec -d '<json body>'
```

Example prompt: Ask DeepSeek-V4-Flash to write a one-paragraph summary of quantum entanglement in plain English, using up to 512 tokens.

## When to prefer this

Choose this endpoint when you need a fast, pay-per-call DeepSeek-V4-Flash-0731 chat completion without account setup, particularly in agentic pipelines that already handle x402 micropayments. It is ideal for lightweight reasoning, summarization, or text generation tasks within the 1024-token output limit and 16,000-character context window. Prefer it over self-hosted DeepSeek or OpenAI when cost per call and no-account access matter.

## Known failure modes

- Messages exceed 16,000 total characters — request rejected
- max_tokens exceeds 1024 — parameter validation error
- Malformed messages array (missing role or content fields) — 4xx error
- Payment not processed via x402 — request blocked
- Model temporarily unavailable — 5xx error

## How this service works

LLM chat completion: send messages and max_tokens, get the reply. OpenAI-style chat completion from DeepSeek-V4-Flash-0731. Returns: an OpenAI-style chat completion from the model the service is named for (DeepSeek-V4-Flash-0731, Qwen3-32B or Llama-3.1-8B-Instruct): POST {messages: [{role, content}], max_tokens <= 1024}; returns the assistant message, the model, and its token usage. Messages up to 16,000 characters in total.

## Output

Returns an OpenAI-style chat completion object containing the assistant's reply message, the model identifier (DeepSeek-V4-Flash-0731), and token usage statistics (prompt tokens, completion tokens, total tokens). The assistant content is the generated text response to the supplied message array.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/arysphere-base-deepseek-chat-completion-cf6560ec/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.arysphere.com](https://www.zero.xyz/host/api.arysphere.com/llms.txt)