Link a bank account

Zero Hash uses the platform supplied Plaid processor token to set up an account via Create external accounts. Zero Hash returns an external_account_id to the platform which can be used for later payment requests without needing to link another account. Platforms may also Get external accounts if the external_account_id is needed.

API calls

Request body

Parameter	Description	Type
participant_code	The code of the participant that wants to create a new ACH transaction, required.	string
account_nickname	Name given to the account. This does not impact further Zero Hash functionality so it is purely for platform reference, required. For testing only: To simulate identity checks and get a rejected account, use this content: '{"name":0, "email": 0, "address": 0}'	string
plaid_processor_token	Token retrieved from Plaid that enables Zero Hash to make API calls on the platform’s behalf, required.	string

Additional fields in response

Parameter	Description	Type
request_id	The unique identifier generated by Zero Hash associated with the request.	string
platform_code	Platform unique identifier.	string
external_account_id	The unique identifier generated by Zero Hash for the account. This must be stored and used to make subsequent payment requests.	string
account_type	Indicates if the account is checking or savings.	string
created_at	Timestamp when the account was created.	UNIX timestamp

Create external account

POST /payments/external_accounts

Sample request

{  
  'message': {  
	  'participant_code': 'ABC123',  
	  'account_nickname': 'Chase',  
	  'plaid_processor_token': 'db884a3e-7eb7-4253-92ee-04ff5efbc365' 
	}  
}

Sample response

{
	'message': {
		'request_id': '0f65678e-2114-469d-b505-c850d776e078', 	
		'participant_code': 'ABC123',
		'platform_code': 'XYZ789',
		'account_nickname': 'Chase',
		'account_type': 'checking',
		'external_account_id': '0f68333e-2114-469d-b505-c850d776e063',
		'created_at': 1561996924964
	}
}

Close external accounts

POST /payments/external_accounts/{external_account_id}/close

This enables closing a customer bank account so it cannot be used with Zero Hash any longer.

Sample response

{
	'message': {
		'request_id': '0f65678e-2114-469d-b505-c850d776e078', 	
		'participant_code': 'ABC123',
		'platform_code': 'XYZ789',
		'account_nickname': 'Chase',
		'account_type': 'checking',
		'external_account_id': '0f68333e-2114-469d-b505-c850d776e063',
    'status': 'closed',
		'created_at': 1561996924964
	}
}

Get external accounts

External account updates can be fetched via API, and received via external account status webhooks.

Query parameters include

page: (optional) the page you would like to request – default value is 1
size: (optional) the number of records per page – default value is 200
participant_code: (optional) the participant for which to filter the result

Returns an array of all accounts that have been posted for ACH transactions.

Response parameters

Parameter	Description	Type
request_id	The unique identifier generated by Zero Hash associated with the request.	string
account_number	The full bank account number of the external account. Value will be empty because of the Plaid token relationship.	string
routing_number	The routing number of the bank where the external account is held. Value will be empty because of the Plaid token relationship.	string
participant_code	The code of the participant that wants to create a new ACH transaction, required.	string
platform_code	Platform unique identifier.	string
account_nickname	Name given to the account. This does not impact further Zero Hash functionality so it is purely for platform reference.	string
account_type	Indicates if the account is checking or savings.	string
external_account_id	The unique identifier generated by Zero Hash for the account. This must be stored and used to make subsequent payment requests.	string
created_at	Timestamp when the account was created.	timestamp
updated_at	Timestamp when the account was last changed.	timestamp

Sample response

{
  "message": [
    {
      "request_id": "0f68333e-2114-469d-b505-c850d776e063",
      "Account_number": "",
      "Routing_number": "",
      "participant_code": "ALI123",
      "platform_code": "TES123",
      "account_nickname": "test1",
      "account_type": "checking",
      "external_account_id": "0f68333e-2114-469d-b505-c850d776e063",
      "created_at": "1975-08-19T23:15:30.000Z",
      "updated_at": "1975-08-19T23:15:30.000Z"
    }
  ],
  "page": 1,
  "total_pages": 1,
  "page_size": 200,
  "count": 10
}