Authentication Guide
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The Renesas Web Data API uses API key authentication to secure access to product data. This guide covers how to obtain, configure, and use API keys for authentication.

Overview

All API requests require authentication using an API key passed in the x-api-key header. The API uses this key to:

Identify and authorize your application
Track usage and rate limiting
Provide access to appropriate data based on your permissions

Authentication Method

API Key Authentication

The API uses a simple API key authentication scheme:

GET /web-data/v1/product-parts HTTP/1.1
Host: api.renesas.com
x-api-key: YOUR_API_KEY_HERE
Accept: application/json

Getting an API Key

Request Process

To obtain an API key for the Renesas Web Data API:

Contact Renesas: Reach out to your Renesas representative or contact support
Provide Requirements: Specify your intended use case and expected API usage
Review Terms: Accept the terms of service and usage agreement
Receive Credentials: You'll receive your API key via secure communication

Key Information Provided

When you receive your API key, you'll get:

API Key: The secret key for authentication
Base URLs: Production and staging endpoints
Rate Limits: Your allowed requests per time period
Access Scope: Which endpoints and data you can access

Using Your API Key

Header Authentication

Include your API key in the x-api-key header with every request:

curl -H "x-api-key: YOUR_API_KEY" \
  -H "Accept: application/json" \
  "https://api.renesas.com/web-data/v1/product-parts"

Code Examples

Python

import requests

API_KEY = "your-api-key-here"
BASE_URL = "https://api.renesas.com/web-data/v1"

def make_api_request(endpoint, params=None):
    headers = {
        "x-api-key": API_KEY,
        "Accept": "application/json"
    }
    
    response = requests.get(f"{BASE_URL}/{endpoint}", 
                          headers=headers, 
                          params=params)
    
    if response.status_code == 200:
        return response.json()
    else:
        response.raise_for_status()

# Usage
parts = make_api_request("product-parts", {"limit": 10})

JavaScript/Node.js

const API_KEY = 'your-api-key-here';
const BASE_URL = 'https://api.renesas.com/web-data/v1';

async function makeApiRequest(endpoint, params = {}) {
    const url = new URL(`${BASE_URL}/${endpoint}`);
    
    // Add query parameters
    Object.keys(params).forEach(key => 
        url.searchParams.append(key, params[key])
    );
    
    const response = await fetch(url, {
        headers: {
            'x-api-key': API_KEY,
            'Accept': 'application/json'
        }
    });
    
    if (!response.ok) {
        throw new Error(`API error: ${response.status} ${response.statusText}`);
    }
    
    return await response.json();
}

// Usage
const parts = await makeApiRequest('product-parts', { limit: 10 });

cURL

# Basic request
curl -H "x-api-key: YOUR_API_KEY" \
  "https://api.renesas.com/web-data/v1/product-parts"

# With query parameters
curl -H "x-api-key: YOUR_API_KEY" \
  "https://api.renesas.com/web-data/v1/product-parts?limit=50&product_family=RX"

# Pretty-printed JSON response
curl -H "x-api-key: YOUR_API_KEY" \
  "https://api.renesas.com/web-data/v1/product-parts" | jq

Environment Configuration

Production vs Staging

Use appropriate base URLs for your environment:

Production:

https://api.renesas.com/web-data/v1

Staging/Development:

https://api.renesas-dev.com/web-data/v1

Environment Variables

Store your API key securely using environment variables:

# .env file
RENESAS_API_KEY=your-production-api-key
RENESAS_DEV_API_KEY=your-staging-api-key
RENESAS_API_BASE_URL=https://api.renesas.com/web-data/v1

Security Best Practices

API Key Protection

Never Commit Keys: Don't include API keys in version control
Use Environment Variables: Store keys in environment variables or secure configuration
Rotate Keys Regularly: Request new keys periodically
Limit Scope: Only request access to endpoints you need
Monitor Usage: Track your API usage for unusual activity

Secure Storage

Server-Side Applications

import os
from typing import Optional

class ReneasAPI:
    def __init__(self):
        self.api_key = os.getenv('RENESAS_API_KEY')
        if not self.api_key:
            raise ValueError("RENESAS_API_KEY environment variable required")
        
        self.base_url = os.getenv('RENESAS_API_BASE_URL', 
                                 'https://api.renesas.com/web-data/v1')
    
    def get_headers(self) -> dict:
        return {
            'x-api-key': self.api_key,
            'Accept': 'application/json'
        }

Client-Side Applications

For client-side applications, use a proxy server to protect your API key:

// Client-side: Make request to your backend
const response = await fetch('/api/renesas/product-parts', {
    method: 'GET',
    headers: {
        'Content-Type': 'application/json'
    }
});

// Backend proxy (Express.js example)
app.get('/api/renesas/*', async (req, res) => {
    const renesasPath = req.path.replace('/api/renesas', '');
    const renesasUrl = `https://api.renesas.com/web-data/v1${renesasPath}`;
    
    const response = await fetch(renesasUrl, {
        headers: {
            'x-api-key': process.env.RENESAS_API_KEY
        }
    });
    
    const data = await response.json();
    res.json(data);
});

Error Handling

Authentication Errors

401 Unauthorized

Missing or invalid API key:

{
  "error": "Unauthorized: Invalid or missing API key",
  "code": 401
}

Solutions:

Verify your API key is correct
Ensure the x-api-key header is included
Check that your key hasn't expired

403 Forbidden

Valid key but insufficient permissions:

{
  "error": "Forbidden: Insufficient permissions for this endpoint",
  "code": 403
}

Solutions:

Contact support to verify your access scope
Ensure you're using the correct endpoint
Check if additional permissions are needed

Rate Limiting

429 Too Many Requests

Exceeded rate limits:

{
  "error": "Rate limit exceeded",
  "code": 429,
  "retry_after": 60
}

Solutions:

Implement exponential backoff
Reduce request frequency
Contact support for higher limits if needed

Rate Limiting

Default Limits

Rate limits vary based on your API key tier and usage agreement. Common limits include:

Requests per minute
Requests per hour
Concurrent connections
Data transfer limits

Handling Rate Limits

Python with Backoff

import time
import requests
from functools import wraps

def rate_limit_retry(max_retries=3, backoff_factor=1):
    def decorator(func):
        @wraps(func)
        def wrapper(*args, **kwargs):
            for attempt in range(max_retries):
                try:
                    response = func(*args, **kwargs)
                    if response.status_code == 429:
                        retry_after = int(response.headers.get('Retry-After', 60))
                        time.sleep(retry_after * backoff_factor)
                        continue
                    return response
                except Exception as e:
                    if attempt == max_retries - 1:
                        raise e
                    time.sleep(backoff_factor * (2 ** attempt))
            return response
        return wrapper
    return decorator

@rate_limit_retry()
def make_request(url, headers):
    return requests.get(url, headers=headers)

JavaScript with Retry Logic

async function makeRequestWithRetry(url, options, maxRetries = 3) {
    for (let attempt = 0; attempt < maxRetries; attempt++) {
        try {
            const response = await fetch(url, options);
            
            if (response.status === 429) {
                const retryAfter = response.headers.get('Retry-After');
                const delay = retryAfter ? parseInt(retryAfter) * 1000 : 1000 * (2 ** attempt);
                
                console.log(`Rate limited. Waiting ${delay}ms before retry...`);
                await new Promise(resolve => setTimeout(resolve, delay));
                continue;
            }
            
            return response;
        } catch (error) {
            if (attempt === maxRetries - 1) throw error;
            await new Promise(resolve => setTimeout(resolve, 1000 * (2 ** attempt)));
        }
    }
}

Testing Authentication

Verify API Key

Test your API key with a simple request:

curl -I -H "x-api-key: YOUR_API_KEY" \
  "https://api.renesas.com/web-data/v1/product-parts?limit=1"

Expected response headers:

HTTP/2 200
content-type: application/json
x-ratelimit-remaining: 999
x-ratelimit-limit: 1000

Health Check Script

import requests

def test_api_key(api_key, base_url):
    headers = {"x-api-key": api_key}
    
    try:
        response = requests.get(f"{base_url}/product-parts", 
                              headers=headers, 
                              params={"limit": 1},
                              timeout=10)
        
        if response.status_code == 200:
            print("✅ API key is valid and working")
            print(f"Rate limit remaining: {response.headers.get('x-ratelimit-remaining', 'Unknown')}")
            return True
        elif response.status_code == 401:
            print("❌ Invalid API key")
            return False
        elif response.status_code == 403:
            print("❌ API key valid but insufficient permissions")
            return False
        else:
            print(f"⚠️  Unexpected response: {response.status_code}")
            return False
            
    except requests.exceptions.RequestException as e:
        print(f"❌ Connection error: {e}")
        return False

# Test your API key
test_api_key("your-api-key", "https://api.renesas.com/web-data/v1")

Troubleshooting

Common Issues

API Key Not Working:

Check for typos in the key
Verify correct header name (x-api-key)
Ensure key hasn't expired
Test with a simple request first

Rate Limiting Issues:

Monitor your request frequency
Implement proper retry logic
Consider caching responses
Contact support for limit increases

Access Denied:

Verify endpoint permissions
Check API key scope
Ensure using correct environment
Contact support for access review

Next Steps

Learn about Product Parts API endpoints
Explore Documents API for technical documentation
Review the Quickstart Guide for complete examples

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Overview

Authentication Method

API Key Authentication

Getting an API Key

Request Process

Key Information Provided

Using Your API Key

Header Authentication

Code Examples

Python

JavaScript/Node.js

cURL

Environment Configuration

Production vs Staging

Environment Variables

Security Best Practices

API Key Protection

Secure Storage

Server-Side Applications

Client-Side Applications

Error Handling

Authentication Errors

401 Unauthorized

403 Forbidden

Rate Limiting

429 Too Many Requests

Rate Limiting

Default Limits

Handling Rate Limits

Python with Backoff

JavaScript with Retry Logic

Testing Authentication

Verify API Key

Health Check Script

Troubleshooting

Common Issues

Next Steps

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Authentication Guide
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