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The API Key is app-scoped (one key per Alchemy App). Enable the networks you want to query in the Alchemy dashboard before connecting — the Default Network field must match a subdomain enabled on your App.

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Create an Alchemy App

Register a free Alchemy account and create an App to get an API Key.

1

Sign up for Alchemy

Open the Alchemy Sign up page and register with First Name, Last Name, Email, and Password — or click Continue with Google. Existing users can click Log in at the bottom of the form.

The Alchemy Sign up form with First Name, Last Name, Email, Password fields and a Continue with Google button.
2

Create a new app

On the Apps page, click + Create new app in the top-right. Fill in Name, an optional Description, and pick a Use case, then click Next. On the following step choose a starter chain and network — you can enable more networks later without recreating the App.

The Create new app form with Name, Description (optional) and Use case fields, and a Next button in the bottom-right.
3

Copy the API Key

Open the App from the Apps list to reach the App Dashboard. The API Key is shown in the top-right of the page next to a Copy button. Copy the value and paste it into the API Key field in StackOne.

The App Dashboard with the API Key field and Copy button highlighted in the top-right.

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Enter the default network

The Default Network field is a plain-text chain subdomain used for chain-scoped actions (NFT v3, Token, Transfers, Utility, RPC). Chain-agnostic Portfolio and Prices actions accept a networks list in the request body and ignore this setting.

1

Open the Endpoints tab

On the App page in the Alchemy dashboard, click Endpoints in the left sidebar. Under Core RPC you’ll see each enabled network with an HTTPS URL column — for example https://eth-mainnet.g.alchemy.com/v2/alch_XXXXXXXXXXXX.

The Endpoints page showing the Core RPC tab with a Network column and an HTTPS URL column for each enabled chain.
2

Copy the subdomain from the HTTPS URL

The subdomain is everything between the scheme and .g.alchemy.com. From eth-mainnet.g.alchemy.com/v2/… copy the value eth-mainnet and paste it into the Default Network field in StackOne.

3

Pick a value from the supported chains

Ethereum: eth-mainnet, eth-sepolia, eth-holesky. Base: base-mainnet, base-sepolia. Polygon: polygon-mainnet, polygon-amoy. Arbitrum: arb-mainnet, arb-sepolia. Optimism: opt-mainnet, opt-sepolia. Others: avax-mainnet, bnb-mainnet, linea-mainnet, zksync-mainnet, shape-mainnet, worldchain-mainnet, monad-testnet, apechain-mainnet, sonic-mainnet, scroll-mainnet, soneium-mainnet, solana-mainnet, and 70+ more — any subdomain that appears in your App’s HTTPS URL list works.

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Linking the Account from the Hub

1

Navigate to the Hub

Use one of the three Linking Account Methods to access the Hub.
2

Fill out the fields

Fill out the following fields using details from your provider:
  • API Key
  • Default Network
3

Connect

  • Click Connect
  • If applicable, the provider will redirect you to a sign-in or authorization page. Complete the provider’s authorization flow.
  • Once authorization is successful, you will see a confirmation popup

If the account linking is successful, you will see the newly linked account in your Accounts page.