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Model Access Gateway – Mistral Large 4 Chat Completions
x402
Model Access Gateway – Mistral Large 4 Chat Completions is a paid API for AI agents from agent402-arb.rosariovitale0096.workers.dev, paid per call via x402, $0.0023/call, status unknown (last checked 2026-10-15).
Send an OpenAI-compatible chat completion request to Mistral Large 4, paid per-request in USDC on Base via x402 with no API key required.
Price / call$0.0023
Success—
StatusUnknown
How this service works
Mistral Large 4 API (mistral/mistral-large-4): LLM inference via OpenAI-compatible chat completions, pay per call in USDC on Base with x402. No API key, no account. Suited for AI agents and scripts that need Mistral Large 4 on demand. Streaming and function calling supported. Exact price in the 402 quote before payment; automatic refund if the model fails to answer.
Output
Returns an OpenAI-compatible chat.completion JSON object containing the assistant's reply text under choices[0].message.content, along with token usage counts (prompt, completion, total), the model identifier, a completion ID, creation timestamp, and a finish_reason (e.g. 'stop').
Example use cases
Keyless LLM inference for autonomous agents
“I want my agent to be able to call Mistral Large 4 on demand without storing any API keys — can it just pay a fraction of a cent in USDC per request and get a chat completion back?”
One-off research question answered by frontier model
“Ask Mistral Large 4 to summarize the latest developments in quantum error correction in about 200 words — pay for it with USDC so I don't have to set up an account.”
AI-powered content drafting with crypto billing
“Draft a professional LinkedIn post announcing our Series A funding round using Mistral Large 4, and bill the inference cost to my USDC wallet on Base via x402.”
Technical details
Endpoint
POSThttps://agent402-arb.rosariovitale0096.workers.dev/llm/mistral-large-4?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need Mistral Large 4 specifically (large context, strong reasoning) and want to avoid API key management or subscriptions — ideal for autonomous agents that pay per call in USDC on Base via x402. Prefer over OpenAI-compatible alternatives when using Mistral's flagship large model without account overhead matters.
Side effects
- Insufficient USDC balance causes x402 payment failure and request is rejected
- Malformed request body (missing required fields like messages) returns a 400 error
- Model unavailable or overloaded upstream returns a 503 or timeout
- Invalid or expired x402 payment header causes authentication failure
- Exceeding token limits for Mistral Large 4 context window causes truncation or error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| model | string | Optional: fixed by the route (mistral/mistral-large-4) |
| tools | array | |
| stream | boolean | true: server-sent events after payment |
| messages | array | |
| max_tokens | integer | Optional, default 4096 |
| temperature | number | |
| response_format | object |
Output
Schema · Response
{
"type": "json",
"example": {
"id": "chatcmpl-7f3c2a91",
"model": "mistral/mistral-large-4",
"usage": {
"total_tokens": 10,
"prompt_tokens": 9,
"completion_tokens": 1
},
"object": "chat.completion",
"choices": [
{
"index": 0,
"message": {
"role": "assistant",
"content": "OK"
},
"finish_reason": "stop"
}
],
"created": 1791979200
}
}Tags
x402
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