Telnyx x402 Gateway – DeepSeek-V4-Flash-0731 Chat Completions

x402

Telnyx x402 Gateway – DeepSeek-V4-Flash-0731 Chat Completions is a paid API for AI agents from x402.telnyx.com, paid per call via x402, $0.005214/call, status unknown (last checked 2026-10-12).

Generates chat completions using the DeepSeek-V4-Flash-0731 model via Telnyx's x402 pay-per-request USDC gateway

Price / call$0.005214

Seller volume →—

Success—

StatusUnknown

How this service works

Pay USDC per request for Telnyx Inference and Audio (text-to-speech, speech-to-text) through x402.

Output

Returns an OpenAI-compatible chat completion JSON object including a unique completion ID, the assistant's reply message, finish reason (e.g. 'stop'), and token usage breakdown (prompt tokens, completion tokens, total tokens).

Example use cases

On-demand AI coding assistant

“I want to query the DeepSeek Flash model to help me debug this Python function — send it the system message 'You are an expert Python developer' and user message 'Why does this code raise a KeyError: for k in d: del d[k]', with up to 512 tokens and temperature 0.2.”

Pay-per-call chatbot prototype

“Without signing up for a monthly plan, use the Telnyx DeepSeek V4 Flash endpoint to answer a customer's question — system: 'You are a friendly customer support agent', user: 'How do I reset my password?', temperature 1.0, max 256 tokens.”

Agentic tool-use inference

“Call the DeepSeek V4 Flash model on Telnyx with these tools defined for weather lookup and calendar access, and pass this user message: 'What meetings do I have tomorrow and what's the weather in New York?' — use temperature 0.5 and up to 1024 tokens.”

Technical details

Endpoint

POSThttps://x402.telnyx.com/v1/chat/completions/_t/deepseek-v4-flash-0731?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need pay-per-call LLM inference with no subscription or API key setup, settling in USDC via x402 micropayment protocol. It is ideal for agents that need cost-controlled, on-demand access to the DeepSeek-V4-Flash-0731 model specifically, with OpenAI-compatible request/response format and tool-calling support up to 16 tools.

Side effects

Payment rejected or insufficient USDC balance — x402 payment header validation fails
Messages array exceeds 32 items or content exceeds 32,000 characters — 400 validation error
max_tokens out of range (must be 1–2048) — 422 unprocessable entity
temperature out of range (must be 0–2) — 422 validation error
Tools array exceeds 16 items — schema validation failure
Model unavailable or Telnyx inference backend down — 503 service unavailable
Malformed JSON body — 400 bad request

Input

Schema · Request body

Field	Type	Description
n	integer	Fixed to one completion per paid call.
model	string	Model identifier; fixed to deepseek-ai/DeepSeek-V4-Flash-0731 on this route.
tools	array
messages	array	OpenAI-style chat messages.
max_tokens	integer
temperature	number

Output

Schema · Response

{
  "type": "json",
  "example": {
    "id": "chatcmpl-xxx",
    "usage": {
      "total_tokens": 16,
      "prompt_tokens": 12,
      "completion_tokens": 4
    },
    "object": "chat.completion",
    "choices": [
      {
        "index": 0,
        "message": {
          "role": "assistant",
          "content": "Hello!"
        },
        "finish_reason": "stop"
      }
    ]
  }
}

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