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Quickstart

This quickstart guide will help you set up and make calls on the Ethereum network using the Infura endpoints.

Don't have an Infura account? Sign up for our free plan and start using the Ethereum network!

Prerequisites

Ensure you have an API key with the Ethereum network enabled.

Make calls

cURL

Run the following command in your terminal, replacing YOUR-API-KEY with your actual Infura API key:

curl https://mainnet.infura.io/v3/YOUR-API-KEY \
  -X POST \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc": "2.0", "method": "eth_blockNumber", "params": [], "id": 1}'

note

In Windows Powershell, quotations in curl commands can behave differently than expected. We recommend using Postman on Windows systems.

Postman

Call the JSON-RPC methods using Postman.

Click Run in Postman to fork the collection and make requests.

info

Set the correct variables for your API key and network before running requests.

Node (JavaScript)

In these examples, you'll use npm as your package manager.

Node Fetch

In your project folder, install the node-fetch package using npm::
```
npm i node-fetch
```

Create your JavaScript file and copy the following code:

Replace YOUR-API-KEY with your actual Infura API key.

index.js
import fetch from "node-fetch"

fetch("https://mainnet.infura.io.infura.io/v3/YOUR-API-KEY", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    jsonrpc: "2.0",
    method: "eth_blockNumber",
    params: [],
    id: 1,
  }),
})
  .then((response) => response.json())
  .then((data) => {
    console.log(data)
  })
  .catch((error) => {
    console.error(error)
  })

Run the code using the following command:
```
node index.js
```

Axios

In your project folder, install the axios package using npm:
```
npm i axios
```

Create your JavaScript file and copy the following code:

Replace YOUR-API-KEY with your actual Infura API key.

index.js
const axios = require("axios")

axios
  .post("https://mainnet.infura.io.infura.io/v3/YOUR-API-KEY", {
    jsonrpc: "2.0",
    method: "eth_blockNumber",
    params: [],
    id: 1,
  })
  .then((response) => {
    console.log(response.data)
  })
  .catch((error) => {
    console.error(error)
  })

Run the code using the following command:
```
node index.js
```

Ethers

In your project folder, install the ethers package using npm:
```
npm install ethers
```

Create your JavaScript file and copy the following code:

Replace YOUR-API-KEY with your actual Infura API key.

index.js
const ethers = require("ethers")

const provider = new ethers.providers.JsonRpcProvider(
  "https://mainnet.infura.io.infura.io/v3/YOUR-API-KEY"
)

provider
  .getBlockNumber()
  .then((blockNumber) => {
    console.log(blockNumber)
  })
  .catch((error) => {
    console.error(error)
  })

Run the code using the following command:
```
node index.js
```

Web3.js

In your project folder, install the latest version of the web3.js library

Create your JavaScript file and copy the following code:

Replace YOUR-API-KEY with your actual Infura API key.

index.js
var { Web3 } = require("web3")
var provider = "https://mainnet.infura.io/v3/YOUR-API-KEY"
var web3Provider = new Web3.providers.HttpProvider(provider)
var web3 = new Web3(web3Provider)

web3.eth.getBlockNumber().then((result) => {
  console.log("Latest Ethereum Block is ", result)
})

Run the code using the following command:
```
node index.js
```

Python

In your project folder, install the requests library:
```
pip install requests
```

Create your Python file and copy the following code:

Replace YOUR-API-KEY with your actual Infura API key.

index.py
import requests
import json

url = "https://mainnet.infura.io/v3/YOUR-API-KEY"

payload = {
  "jsonrpc": "2.0",
  "method": "eth_blockNumber",
  "params": [],
  "id": 1
}

headers = {'content-type': 'application/json'}

response = requests.post(url, data=json.dumps(payload), headers=headers).json()

print(response)

Run the code using the following command:
```
python index.py
```

Next steps

Now that you have successfully made a call to the Ethereum network, you can explore more functionalities and APIs provided by Infura. Here are some suggestions:

Explore other Ethereum APIs: Infura supports a wide range of APIs. You can find more information in the JSON-RPC API method documentation.
Try out different networks: Infura supports multiple networks including Arbitrum, Linea, Polygon, Optimism, and more.
Monitor your usage: Keep an eye on your usage on the Infura dashboard to ensure you're not hitting your rate limits.

Remember, the Infura community is here to help. If you have any questions or run into any issues, check out the Infura community for help and answers to common questions.