# Mistral Flagship LLM via x402 Gateway

> Mistral Flagship LLM via x402 Gateway is a paid API for AI agents from x402-gateway-production.up.railway.app, paid per call via x402, $0.006/call, status unknown (last checked 2026-09-15).

Calls Mistral's flagship multilingual large language model and returns a generated text response, billed per call via x402 micropayment.

## Facts

- Endpoint: POST https://x402-gateway-production.up.railway.app/api/llm/mistral
- Price: $0.006/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-gateway-production-up-railway-app-cb213c08
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QnYLLD-U87jXX8SiVvCw2

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 x402-gateway-production-up-railway-app-cb213c08 -d '<json body>'
```

Example prompt: Use Mistral's flagship model to write me a professional email in French apologizing for a delayed shipment to a customer named Marie Dupont.

## When to prefer this

Choose this endpoint when you need strong multilingual output (especially European languages), want access to Mistral's best general-purpose model, or prefer a European AI provider with different data governance than OpenAI or Anthropic. Ideal for agents needing pay-per-call billing without a Mistral API subscription.

## Known failure modes

- Payment not included or invalid x402 payment header — returns 402 Payment Required
- Malformed request body or missing prompt — returns 400 Bad Request
- Mistral API upstream error or timeout — returns 502 or 503
- Rate limit exceeded on the gateway — returns 429 Too Many Requests
- Model unavailable or overloaded — returns 503 Service Unavailable

## How this service works

Mistral's flagship model — strong European AI with great multilingual support

## Output

A generated text completion or response from Mistral's flagship model, returned as structured JSON containing the model output. The response reflects Mistral's strong multilingual and reasoning capabilities.

## Example request

```json
{
 "model": "mistral-large",
 "messages": [
  {
   "role": "user",
   "content": "Write a brief professional greeting in English for a customer service chatbot."
  }
 ],
 "max_tokens": 150
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-gateway-production-up-railway-app-cb213c08/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-gateway-production.up.railway.app](https://www.zero.xyz/host/x402-gateway-production.up.railway.app/llms.txt)