All Nolimitnodes API requests require authentication via an API key. Your API key is passed as the x-api-key header on every request.

​
Obtaining an API Key

1

Log In

Go to the Nolimitnodes Dashboard.
2

Generate Key

Navigate to the API Keys section and click Generate New Key.
3

Copy & Store

Copy your API key immediately. Store it in a secure location such as an environment variable or secrets manager.

​
Using Your API Key

Pass your API key in the x-api-key header for all endpoints: 
https://rpc.nln.clr3.org
# Header: x-api-key: YOUR_API_KEY

​
Example Request

curl https://rpc.nln.clr3.org \
  -H "Content-Type: application/json" \
  -H "x-api-key: YOUR_API_KEY" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "getSlot"
  }'

​
Security Best Practices

Keep your API key secure and do not expose it in public code or repositories.
  • Use environment variables — never hard-code API keys in source files.
  • Restrict access — only share keys with team members who need them.
  • Rotate regularly — regenerate your API key periodically from the dashboard.
  • Monitor usage — check your dashboard for unexpected activity.
  • Use .gitignore — ensure .env files containing keys are excluded from version control.
Example: Loading from environment
export NLN_API_KEY="your-api-key-here"
Using in code
const apiKey = process.env.NLN_API_KEY;
// Pass as header, not query param
const response = await fetch("https://rpc.nln.clr3.org", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "x-api-key": apiKey,
  },
  body: JSON.stringify({ jsonrpc: "2.0", id: 1, method: "getSlot" }),
});