Infura Project ID: A Practical Guide to Setup and Use

What Is an Infura Project ID?

An Infura project ID is a unique alphanumeric string that identifies your project when making requests to Infura's RPC endpoints. It functions as an API key, allowing Infura to track usage and enforce rate limits associated with your account.

Every Infura project—whether for Ethereum, IPFS, or other supported networks—has its own project ID. You include this ID in the URL of your RPC requests to authenticate them.

• Acts as an API key for Infura services.
• Required for all RPC and IPFS requests.
• Unique per project in your Infura dashboard.
• Can be rotated or regenerated if compromised.

How to Create an Infura Project and Get Your Project ID

To obtain a project ID, you need an Infura account. Sign up or log in at infura.io, then navigate to the dashboard. From there, you can create a new project for the network you intend to use, such as Ethereum Mainnet or a testnet.

After creating a project, the dashboard displays the project ID prominently. You can copy it and use it in your application's configuration. The exact steps may vary slightly as the dashboard interface evolves, but the project ID is always available in the project settings.

• Sign up or log in to your Infura account.
• Go to the dashboard and click 'Create New Project'.
• Select the desired network (e.g., Ethereum Mainnet).
• Name your project and confirm creation.
• Locate the project ID in the project details or settings.

Using Your Project ID in RPC URLs

Once you have your project ID, you can construct RPC URLs for supported networks. Infura's endpoint format typically includes the network name and your project ID. For example, the Ethereum Mainnet HTTPS endpoint looks like this:

https://mainnet.infura.io/v3/YOUR_PROJECT_ID

Common Use Cases and Code Examples

You can use your project ID with various libraries and tools. Below are examples for popular Ethereum libraries. Replace YOUR_PROJECT_ID with your actual project ID.

// Using web3.js
const Web3 = require('web3');
const web3 = new Web3('https://mainnet.infura.io/v3/YOUR_PROJECT_ID');

// Using ethers.js
const { ethers } = require('ethers');
const provider = new ethers.JsonRpcProvider('https://mainnet.infura.io/v3/YOUR_PROJECT_ID');

Security Best Practices for Your Project ID

Your project ID is sensitive and should be treated like a password. Exposing it publicly can lead to unauthorized use and potential rate-limiting or extra costs if your plan includes overages.

Store the project ID in environment variables or a secrets manager, and never commit it to public repositories. If you suspect it has been compromised, regenerate it in the Infura dashboard immediately.

• Use environment variables (e.g., .env files) to store the ID.
• Avoid hardcoding the ID in client-side code.
• Restrict project ID usage by domain or IP where possible.
• Monitor usage regularly for anomalies.
• Rotate the project ID if exposed.

Troubleshooting Common Project ID Issues

If your requests fail, verify that you are using the correct project ID and endpoint for the network. Common errors include 'invalid project ID' or 'project ID not found', which usually indicate a typo or a deleted project.

Also check that your project is active and that you haven't exceeded your plan's rate limits. For persistent issues, consult Infura's documentation or support.

• Double-check the project ID for typos.
• Ensure the endpoint matches the network (e.g., mainnet vs. testnet).
• Verify that the project is not paused or deleted.
• Check rate limits and usage in the dashboard.
• Review network connectivity and firewall settings.

Managing Multiple Projects and IDs

Infura allows you to create multiple projects, each with its own project ID. This is useful for separating environments (development, staging, production) or different applications.

You can manage all projects from the dashboard, view usage per project, and rotate IDs independently. Keep track of which ID corresponds to which environment to avoid confusion.

• Create separate projects for each environment.
• Use descriptive names for easy identification.
• Monitor usage per project to optimize performance.
• Rotate IDs periodically for security.