This guide explains how to buy access, retrieve your key, run the API, understand limits, and troubleshoot common issues.
Open the main website and choose a plan:
https://cortex-runner-private.onrender.com
Complete the Stripe checkout process.
Your customer key will look similar to:
cust_xxxxxxxxxxxxxxxxxxxxxxxxx
Your customer key authorizes your access to the Smart AI Runner+ API.
Every request must include this exact header name:
X-CORTEX-KEY
API endpoint:
https://cortex-runner-private.onrender.com/ask
curl -X POST "https://cortex-runner-private.onrender.com/ask" \
-H "Content-Type: application/json" \
-H "X-CORTEX-KEY: cust_your_key_here" \
-d '{"prompt":"Hello Smart AI Runner+"}'
$headers = @{
"Content-Type" = "application/json"
"X-CORTEX-KEY" = "cust_your_key_here"
}
$body = @{
prompt = "Hello Smart AI Runner+"
} | ConvertTo-Json
Invoke-RestMethod -Method Post `
-Uri "https://cortex-runner-private.onrender.com/ask" `
-Headers $headers `
-Body $body
For many Windows users, Git Bash is the easiest place to start.
{
"status": "success",
"response": "AI generated response"
}
| Error | Meaning | What To Do |
|---|---|---|
| Missing X-CORTEX-KEY | No customer key header was sent | Add the X-CORTEX-KEY header to your request |
| invalid_or_inactive_customer_key | The key is inactive, invalid, or old | Double-check your key or contact the administrator for help |
| 503 System temporarily disabled | The admin kill switch is turned on for maintenance or protection | Wait and try again later or contact the administrator |
| Plan | Daily Limit | Max Tokens/Request |
|---|---|---|
| Starter | 50 requests | 1,500 |
| Pro | 100 requests | 1,500 |
| Enterprise | 500 requests | 1,500 |
Use Quick Start for the fastest setup path, or contact the platform administrator.