FunRun

Test Function

Input (JSON)

Output

Click "Execute" to run your function...

Function Settings

Current Function

No function selected

API Endpoints

GET/POST/PUT/DELETE /fn/{function-name}

Storage Location

./functions/

Input Structure

{ query, params, body, method, headers }

Function Timeout

30 seconds

API Usage Examples

Programming Language

💻 cURL Examples

Command-line HTTP requests

GET Request

# Simple GET with query parameters
curl "http://localhost:3000/fn/hello?name=World&limit=10"

POST Request

# POST with JSON body
curl -X POST http://localhost:3000/fn/hello \
  -H "Content-Type: application/json" \
  -d '{"message": "Hello API!", "user": "john"}'

With Authentication

# POST with Bearer token
curl -X POST http://localhost:3000/fn/hello \
  -H "Authorization: Bearer your-token-here" \
  -H "Content-Type: application/json" \
  -d '{"action": "authenticate"}'

🟢 Node.js Examples

Server-side JavaScript

Using fetch() (Node 18+)

const response = await fetch('http://localhost:3000/fn/hello', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'Authorization': 'Bearer your-token-here'
  },
  body: JSON.stringify({
    message: 'Hello from Node.js!',
    timestamp: new Date().toISOString()
  })
});

const result = await response.json();
console.log('Function result:', result);

Using axios

const axios = require('axios');

try {
  const response = await axios.post('http://localhost:3000/fn/hello', {
    message: 'Hello API!',
    data: { key: 'value' }
  }, {
    headers: {
      'Authorization': 'Bearer your-token-here'
    }
  });
  
  console.log('Success:', response.data);
} catch (error) {
  console.error('Error:', error.response?.data || error.message);
}

🐍 Python Examples

Using requests library

GET Request

import requests

# GET with query parameters
response = requests.get(
    'http://localhost:3000/fn/hello',
    params={'name': 'World', 'limit': 10}
)

if response.status_code == 200:
    result = response.json()
    print('Success:', result)
else:
    print('Error:', response.status_code, response.text)

POST Request

import requests

# POST with JSON data
response = requests.post(
    'http://localhost:3000/fn/hello',
    json={
        'message': 'Hello from Python!',
        'user': 'python-client'
    },
    headers={'Authorization': 'Bearer your-token-here'}
)

result = response.json()
print('Function result:', result)

🌐 JavaScript (Browser)

Client-side web requests

Modern fetch() API

async function callFunction() {
  try {
    const response = await fetch('/fn/hello', {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
        'Authorization': 'Bearer your-token-here'
      },
      body: JSON.stringify({
        message: 'Hello from browser!',
        userAgent: navigator.userAgent
      })
    });
    
    if (!response.ok) {
      throw new Error(`HTTP error! status: ${response.status}`);
    }
    
    const result = await response.json();
    console.log('Function result:', result);
    return result;
  } catch (error) {
    console.error('Error calling function:', error);
    throw error;
  }
}

// Call the function
callFunction();

💡 Pro Tips

HTTP Methods: GET, POST, PUT, DELETE supported

Query Parameters: ?name=value&limit=10

Headers: Passed through (useful for auth)

Response Types: Return strings for text, objects for JSON

Timeout: 30 second limit for API calls

Input Object: { query, params, body, method, headers }

🤖 AI Agent

🤖

Hello! I'm your AI assistant. I can help you with:

Writing and optimizing function code
Debugging issues
API integration examples
Best practices and suggestions

How can I help you with your function today?

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📦 NPM Packages

🚀 How to Use Packages

Simply use require() or import in your function code. Packages will be automatically detected and installed when you save the function.

Example Usage

// Using popular packages
const axios = require('axios');
const moment = require('moment');
const _ = require('lodash');

// Your function code
const response = await axios.get('https://api.example.com');
const formatted = moment().format('YYYY-MM-DD');
const filtered = _.filter(data, item => item.active);

⚡ FunRun

📁 Functions