Here is an article on retrieving USD value of transferred ERC-20 tokens via Etherscan API:

Retrieving USD Value of Transferred ERC-20 Tokens via Etherscan API

As a developer working on projects that involve blockchain and cryptocurrency, you’re likely familiar with the importance of accurately tracking the value of assets transferred between wallets. In this article, we’ll explore how to retrieve the USD value of ERC-20 tokens transferred using the Etherscan API.

What is ERC-20?

ERC-20 (Ethereum Standard) is a token standard for creating decentralized applications (dApps) on the Ethereum blockchain. It’s one of the most widely used token standards, and it has gained immense popularity in recent years. ERC-20 tokens are typically used as store-of-value (SOV) assets, allowing users to hold, trade, and invest them.

The Etherscan API

Etherscan is a popular blockchain data provider that offers a robust set of APIs for accessing Ethereum-related data. The Etherscan API provides a convenient way to retrieve information about ERC-20 tokens, including their balance, token ID, name, symbol, and more.

Retrieving USD Value via Etherscan API

To retrieve the USD value of transferred ERC-20 tokens using the Etherscan API, you can follow these steps:

• Create an account on Etherscan: If you haven’t already, create a free account on Etherscan to access their APIs.

• Install the Etherscan Python library: You’ll need to install the etherscan Python library to interact with the API. You can do this by running pip install etherscan-api.

• Authenticate with the API: Use your username and password to authenticate with the Etherscan API.

• Use the ERC-20 token endpoint: The ERC-20 token endpoint provides information about a specific ERC-20 token, including its balance in USD.

• Send a GET request: Send a GET request to the ERC-20 token endpoint using your chosen programming language (e.g., Python).

• Parse and format the response: Parse the JSON response from the API and extract the USD value.

Example Code

Here’s an example code snippet in Python that demonstrates how to retrieve the USD value of transferred ERC-20 tokens using the Etherscan API:

import requests







Set your username, password, and API endpoint URL

username = "your_username"

password = "your_password"

api_url = "



Authenticate with the API

response = requests.post(api_url + "/auth", auth=(username, password))



Extract the token ID from the response

token_id = None 
Replace this with your desired ERC-20 token



Set the search query for the ERC-20 token endpoint

query = f"token={token_id}&symbol={token_id}"



Send a GET request to the ERC-20 token endpoint

response = requests.get(api_url + "/tokens", params={"q": query})



Parse and format the response

data = response.json()



Extract the USD value from the response

usd_value = data["result"][0]["amount"] / 10000000000


print(f"USD Value of {token_id}: {usd_value}")

Best Practices

When using the Etherscan API, keep in mind:

• Make sure to replace your username and password with your actual credentials.

• Use a secure method for storing your credentials, such as environment variables or a secrets manager.

• Be mindful of rate limiting and usage limits when sending multiple requests per second.

By following these steps and guidelines, you can effectively retrieve the USD value of transferred ERC-20 tokens using the Etherscan API. Happy coding!

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