Rather than handling account and routing numbers directly, you can use Plaid Link to enable your users to instantly authenticate their external bank account information. Once authenticated, you can create a Plaid processor_token which can be sent to Treasury Prime as part of the Counterparty object in place of account and routing numbers. More information on using Plaid’s Treasury Prime Integration–including sample code–can be found at https://plaid.com/docs/auth/partnerships/treasury-prime/

​
Production Implementation

The requirements for implementing the Plaid integration for Treasury Prime largely revolve around the configuration and use of the Plaid Link client-side component. This topic is covered in great detail in Plaid’s documentation and in the examples provided in their Treasury Prime integration guide. It is recommended that you review these documents in order to understand the process of implementing Plaid Link and obtaining a processor_token prior to beginning this guide. Once you have completed the steps to authenticate your user using Plaid Link and have obtained a processor_token, you are ready to create a Counterparty which can be used to send ACH payments to the linked account. Note in the example below that you are not required to pass an account or routing number when creating the Counterparty, just the plaid_processor_token. When the Counterparty is created, Treasury Prime will exchange this token with Plaid to obtain the necessary details to send payments to the linked account.
Example Request to Create a Counterparty using a Plaid processor_token
curl -u $API_KEY_ID:$API_SECRET_KEY 'https://api.sandbox.treasuryprime.com/counterparty' \
-H 'Content-Type: application/json' \
-d '{
    "name_on_account": "Jim Plaidly",
    "plaid_processor_token": "processor-sandbox-12345678-a94b-4eea-80b8-abcdefg94abc"
}'
Example Response
{
    "created_at": "2022-07-01T14:03:36Z",
    "updated_at": "2022-07-01T14:03:36Z",
    "ach": {
        "account_number": "1111222233330000",
        "account_type": "checking",
        "routing_number": "011401532"
    },
    "wire": null,
    "name_on_account": "Jim Plaidly",
    "plaid_processor_token": "processor-sandbox-12345678-a94b-4eea-80b8-abcdefg94abc",
    "id": "cp_11aa22bbbbqpyx",
    "userdata": null
}

​
Supported Payment Types

The Plaid processor_token can be used in the creation of counterparties for sending ACH payments only. The integration with Plaid does not currently support the creation of counterparties used for sending wires.

​
Testing in Sandbox

https://plaid.com/docs/api/sandbox/ While you can test the Treasury Prime Plaid Integration in the Developer Sandbox using the same steps outlined above for the production environment, Plaid has provided some shortcuts in their own sandbox environment to make generating and testing a processor_token even easier. The steps below outline the process of creating a Plaid processor_token without requiring the integration and use of the Plaid Link component. This is useful for initial testing and prototyping while working in the Treasury Prime Developer Sandbox, but will not function in a production environment. The steps for obtaining the Plaid processor_token and creating a Counterparty object using the Plaid and Treasury Prime sandbox environments are outlined below.

​
1. Retrieve client_id and Secret for Plaid Sandbox

Log into your Plaid account, and locate the client_id and sandbox secret from the dashboard. If you do not already have a Plaid account, you can create one here. Fetching Plaid Sandbox Keys

​
2. Create Plaid public_token

Example Request
curl -L -X POST 'https://sandbox.plaid.com/sandbox/public_token/create' \
-H 'Content-Type: application/json' \
-d '{
  "client_id": "plaid_client_id",
  "secret": "plaid_secret",
  "institution_id": "ins_3",
  "initial_products": ["auth"],
  "options": {
    "webhook": "https://www.genericwebhookurl.com/webhook"
  }
}'
Example Response
{
    "public_token": "public-sandbox-123ee5c3-456f-4e91-8ee9-7895c2fabcde",
    "request_id": "AiJya50u9RGa012"
}

​
3. Exchange Plaid public_token for access_token

Example Request
curl -L -X POST 'https://sandbox.plaid.com/item/public_token/exchange' \
-H 'Content-Type: application/json' \
-d '{
  "client_id": "plaid_client_id",
  "secret": "plaid_secret",
  "public_token": "public-sandbox-123ee5c3-456f-4e91-8ee9-7895c2fabcde"
}'
Example Response
{
    "access_token": "access-sandbox-123456db-6ee3-4f18-b235-78901242106e",
    "item_id": "1234omG8jaldieEA1NEUDaZbVJv4mLulNGabc",
    "request_id": "1234h6ZVYpKSabc"
}

​
4. Get Plaid account_id

Example Request
curl -L -X POST 'https://sandbox.plaid.com/accounts/get' \
-H 'Content-Type: application/json' \
--data-raw '{
 "client_id": "plaid_client_id",
 "secret": "plaid_secret",
 "access_token": "access-sandbox-123456db-6ee3-4f18-b235-78901242106e"
}'
Example Response
{
  "accounts": [
    {
        "account_id": "1234abcd5GHDzL4lpz4BfmKvNKMRjns35678",
        "balances": {
            "available": 100,
            "current": 110,
            "iso_currency_code": "USD",
            "limit": null,
            "unofficial_currency_code": null
        },
        "mask": "0000",
        "name": "Plaid Checking",
        "official_name": "Plaid Gold Standard 0% Interest Checking",
        "subtype": "checking",
        "type": "depository"
    },
    ...
 ]
 ...
}

​
5. Create Plaid processor_token

Example Request
curl -L -X POST 'https://sandbox.plaid.com/processor/token/create' \
-H 'Content-Type: application/json' \
-d '{
 "client_id": "plaid_client_id",
 "secret": "plaid_secret",
    "access_token": "access-sandbox-123456db-6ee3-4f18-b235-78901242106e",
    "account_id": "1234abcd5GHDzL4lpz4BfmKvNKMRjns35678",
    "processor": "treasury_prime"
}'
Example Response
{
    "processor_token": "processor-sandbox-37e03d34-03ac-404f-a99b-5c24763a73d5",
    "request_id": "cdbGEcRCCel5Tp8"
}

​
6. Create Treasury Prime Counterparty using Plaid processor_token

Example Request
curl -u $API_KEY_ID:$API_SECRET_KEY 'https://api.sandbox.treasuryprime.com/counterparty' \
-H 'Content-Type: application/json' \
-d '{
    "name_on_account": "Jim Plaidly",
    "plaid_processor_token": "processor-sandbox-12345678-a94b-4eea-80b8-abcdefg94abc"
}'
Example Response
{
    "created_at": "2022-07-01T14:03:36Z",
    "updated_at": "2022-07-01T14:03:36Z",
    "ach": {
        "account_number": "1111222233330000",
        "account_type": "checking",
        "routing_number": "011401532"
    },
    "wire": null,
    "name_on_account": "Jim Plaidly",
    "plaid_processor_token": "processor-sandbox-12345678-a94b-4eea-80b8-abcdefg94abc",
    "id": "cp_11aa22bbbbqpyx",
    "userdata": null
}

​
7. Create payment using Counterparty ID

Example Request (ACH credit)
curl -u $API_KEY_ID:$API_SECRET_KEY 'https://api.sandbox.treasuryprime.com/ach' \
-H 'Content-Type: application/json' \
-d '{
    "account_id": "acct_1234dk7n699ges",
    "amount": "100.00",
    "counterparty_id": "cp_11aa22bbbbqpyx",
    "direction": "credit",
    "sec_code": "ccd"
}'
Example Response
{
    "description": null,
    "amount": "100.00",
    "service": "standard",
    "counterparty_id": "cp_11aa22bbbbqpyx",
    "bankdata": null,
    "bank_id": "bank_treasuryprime",
    "account_id": "acct_1234dk7n699ges",
    "addenda": [],
    "org_id": "org_12345cx2km5",
    "batch_key": null,
    "effective_date": "2022-07-01",
    "updated_at": "2022-07-01T18:24:25Z",
    "status": "pending",
    "id": "ach_11223344bc0frc",
    "error": null,
    "sec_code": "ccd",
    "scheduled_settlement": null,
    "direction": "credit",
    "created_at": "2022-07-01T18:24:25Z",
    "userdata": null
}