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Plaid Integration

To integrate with Heron Data using Plaid, you’ll need to configure an integration in the Heron and Plaid Dashboards.


Before following this guide, you will need:

  • Access to and via your username and password, and also an api_key to call our API.
  • A working Plaid Link implementation including storing item_ids and access_tokens in your system.
  • A unique identifier for each of your customers (which can have many Plaid connections) that you can send to us. We call this the end_user_id.

Integration steps

  1. Log in to

  2. Go to Settings on the sidebar menu then scroll to the Integrations section.

  3. Select “Plaid” as an integration type and give your integration a meaningful name.

    Heron Dashboard Add Plaid Integration

  4. Go to your Plaid dashboard ( and copy over the client_id and secret.

    Ensure the secret is for the environment (Development, Sandbox, Production) you intend to use

    Plaid Dashboard Keys

  5. Enter the Plaid keys from above into the Heron Dashboard, and then submit the form.

  6. Once created you will see your integration in a table. Click View to get the webhook URL and link URL which you will need in the next steps.

    Heron Dashboard Integrations List

  7. In your code, set the webhook parameter of /link/token/create to the webhook URL. (Alternatively, if you want to keep your webhook handling, forward all Plaid incoming webhooks including headers to the webhook URL)

  8. In your code, after calling /item/public_token/exchange send the resulting Plaid item_id and access_token, along with your end_user_id as a POST request to the link URL, documented here.

Final result

This diagram illustrates the final flow of data between your customers, your Plaid Link flow, Plaid and Heron Data. The blue lines represent the code changes explained in the previous section.

Plaid Integration Diagram

Whenever Plaid has new transactions for this Item, we will retrieve, store and process them. The incremental transactions will be available to consume via our API or our dashboard.