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Agent Kiosk LLM Chat Completions Gateway
x402
Agent Kiosk LLM Chat Completions Gateway is a paid API for AI agents from agent-kiosk.vercel.app, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-19).
OpenAI-compatible chat completions endpoint that accepts prompts and messages arrays, routes to LLMs like GPT-4o-mini or DeepSeek, and charges $0.002 USDC per call via x402 with no API key required.
Price / call$0.002
Success—
StatusUnknown
How this service works
OpenAI-compatible LLM Chat Completions Gateway ($0.002 USDC/call). Drop-in replacement for /v1/chat/completions — change base_url to https://agent-kiosk.vercel.app/v1 and pay per request in Base USDC via x402 with zero account or API key setup.
Output
Returns an OpenAI-format chat completion JSON object containing an id, model name, object type 'chat.completion', and a choices array with the assistant's message content and finish_reason (e.g. 'stop').
Example use cases
Agent-to-LLM micropayment chat
“Send this message to gpt-4o-mini using the pay-per-request gateway — no API key needed: 'Summarize the key risks of providing liquidity on Uniswap v3.'”
DeFi research question via LLM
“Ask deepseek-chat to explain how the x402 payment protocol works for AI agents, and charge my Base USDC wallet the small per-call fee automatically.”
Serverless LLM in automated workflow
“In my n8n workflow, hit the OpenAI-compatible chat endpoint with temperature 0.2 and the message 'Draft a one-paragraph executive summary of today's crypto market moves' — pay per call in USDC, no subscription.”
Technical details
Endpoint
POSThttps://agent-kiosk.vercel.app/v1/chat/completions?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need an OpenAI-compatible LLM chat completion with zero account setup, no API key management, and true pay-per-call billing in Base USDC via x402. Ideal for AI agents, autonomous workflows, or developers who want to avoid subscription commitments and integrate LLM calls directly into crypto-native or agentic pipelines at $0.002 per request.
Side effects
- Insufficient USDC balance on Base — payment fails and request is rejected
- Invalid or unsupported model identifier returns an error
- Malformed messages array or missing both prompt and messages fields
- Rate limiting or cold-start latency on Vercel serverless deployment
- x402 payment header missing or malformed — gateway rejects without processing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| model | string | Model identifier (e.g. gpt-4o-mini, openai, deepseek-chat) |
| prompt | string | Optional shorthand prompt string if messages array is omitted |
| messages | array | OpenAI-format messages array [{role: 'user', content: '...'}] |
| temperature | number | Sampling temperature (0.0 - 2.0) |
Output
Schema · Response
{
"type": "json",
"example": {
"id": "chatcmpl_x402",
"model": "gpt-4o-mini",
"object": "chat.completion",
"choices": [
{
"index": 0,
"message": {
"role": "assistant",
"content": "Base L2 offers top USDC lending yields on Morpho and Aave v3."
},
"finish_reason": "stop"
}
]
}
}Tags
x402
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