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Telnyx x402 Gateway — DeepSeek-V4.1-Flash Chat Completions
x402
Telnyx x402 Gateway — DeepSeek-V4.1-Flash Chat Completions is a paid API for AI agents from x402.telnyx.com, paid per call via x402, $0.013259/call, status unknown (last checked 2026-10-12).
Generate chat completions using the DeepSeek-V4.1-Flash model via Telnyx, paid per-request in USDC through the x402 protocol.
Price / call$0.013259
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 JSON chat completion object containing the assistant's reply message, finish reason (e.g. 'stop'), prompt/completion/total token counts, a unique completion ID, and the object type 'chat.completion'.
Example use cases
On-demand AI coding assistant
“Ask the Telnyx DeepSeek-V4.1-Flash model to review this Python function and suggest improvements: 'def add(a,b): return a+b' — use temperature 0.3 and cap the response at 300 tokens, paying per call.”
Automated customer FAQ responder
“Send the user's question 'What is your return policy?' to the DeepSeek-V4.1-Flash model via Telnyx with the system message 'You are a helpful e-commerce support agent', max 200 tokens, temperature 0.5, and bill the USDC fee per request.”
Tool-augmented agent reasoning step
“Run a DeepSeek-V4.1-Flash inference through Telnyx with these messages and the following tool definitions for a weather lookup — system: 'You are an agent', user: 'What's the weather in Paris?' — temperature 1.0, up to 1024 tokens, paying per call in USDC.”
Technical details
Endpoint
POSThttps://x402.telnyx.com/v1/chat/completions/_t/deepseek-v4.1-flash?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need per-request, pay-as-you-go access to the DeepSeek-V4.1-Flash model without committing to a subscription, especially when paying programmatically in USDC via the x402 protocol. It is ideal for agents that need autonomous micropayment-based inference, OpenAI-compatible chat completions with optional tool calling, or bursty workloads where pre-purchasing API credits is impractical.
Side effects
- Payment failure — insufficient USDC balance or x402 payment rejected, returns 402 Payment Required
- Invalid model identifier — model field must be exactly 'deepseek-ai/DeepSeek-V4.1-Flash', otherwise 400
- Message array exceeds 32 items or content exceeds 32,000 characters, returns 400 validation error
- More than 16 tools provided, returns 400
- max_tokens out of range (must be 1–2048), returns 400
- Temperature out of range (must be 0–2), returns 400
- Telnyx inference backend unavailable, returns 503
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-V4.1-Flash 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"
}
]
}
}Tags
x402
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