1. Create the Plugin Go to Bubble Plugin Editor

Click "New Plugin"

Name it something like Covalent Blockchain API

Save the plugin

2. Set API Name and Authentication
Go to the "API Calls" tab

In API Name, enter: Covalent

Set Authentication to: Private key in header

3. Add Shared Headers
Under Shared headers for all calls, click Add a shared header and enter the following:

Key Value Visibility
accept application/json Public

4. Add Shared Parameters
No shared parameters are needed globally for all calls in this configuration.

5. Configure API Calls
✅ 1. List all chains
Name: List all chains

Use as: Data

Data type: JSON

Method: GET

URL: https://api.covalenthq.com/v1/chains/

Add parameter:

key: auth-token

value: <your_covalent_api_key> (mark as Private)

✅ 2. Get token balances for address
Name: Get balances

Use as: Data

Data type: JSON

Method: GET

URL:

https://api.covalenthq.com/v1/<chain_id>/address/<wallet_address>/balances_v2/
Parameters:

chain_id: Public

wallet_address: Public

key: auth-token → <your_api_key> (Private)

✅ 3. Get transactions
Name: Get transactions

Use as: Data

Data type: JSON

Method: GET

URL:

https://api.covalenthq.com/v1/<chain_id>/address/<wallet_address>/transactions_v2/
Parameters:

chain_id: Public

wallet_address: Public

key: auth-token → <your_api_key> (Private)

✅ 4. Get token transfers
Name: Get token transfers

Use as: Data

Data type: JSON

Method: GET

URL:

https://api.covalenthq.com/v1/<chain_id>/address/<wallet_address>/transfers_v2/
Parameters:

chain_id: Public

wallet_address: Public

key: auth-token → <your_api_key> (Private)

✅ 5. Get NFT data
Name: Get NFT metadata

Use as: Data

Data type: JSON

Method: GET

URL:

https://api.covalenthq.com/v1/<chain_id>/tokens/<contract_address>/nft_metadata/<token_id>/
Parameters:

chain_id: Public

contract_address: Public

token_id: Public

key: auth-token → <your_api_key> (Private)

6. Initialize Each API Call
For each API call, click "Initialize call" after entering sample values.

Bubble will retrieve the API response structure and allow it to be used in the app.