Last updated: 2026-04-20

Mistral Integration

Route Mistral API calls through SpendLil.

SpendLil proxies Mistral's API. Swap api.mistral.ai for mistral.gateway.spendlil.ai and add X-SpendLil-Key. Your existing Authorization header passes through unchanged — Mistral is OpenAI-compatible, so you can use the OpenAI SDK with the Mistral gateway.

URL Pattern

diff Before → After 
- POST https://api.mistral.ai/v1/chat/completions
+ POST https://mistral.gateway.spendlil.ai/v1/chat/completions

OpenAI SDK (Python)

python Use the OpenAI SDK with the Mistral gateway 
import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ['MISTRAL_API_KEY'],
    base_url='https://mistral.gateway.spendlil.ai/v1',
    default_headers={'X-SpendLil-Key': os.environ['SPENDLIL_KEY']},
)

response = client.chat.completions.create(
    model='mistral-large-latest',
    messages=[{'role': 'user', 'content': 'Hello'}],
)
print(response.choices[0].message.content)

cURL

bash Direct HTTP request 
curl https://mistral.gateway.spendlil.ai/v1/chat/completions \
  -H "Authorization: Bearer $MISTRAL_API_KEY" \
  -H "X-SpendLil-Key: $SPENDLIL_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "mistral-large-latest",
    "messages": [{"role": "user", "content": "Hello"}]
  }'

Cost Tracking

ModelInput (per 1M tokens)Output (per 1M tokens)
mistral-large$2.00$6.00
mistral-small$0.20$0.60