Your Plaid API `client_id`. The `client_id` is required and may be provided either in the `PLAID-CLIENT-ID` header or as part of a request body.

Your Plaid API `secret`. The `secret` is required and may be provided either in the `PLAID-SECRET` header or as part of a request body.

The access token associated with the Item data is being requested for.

The Plaid `account_id` of the account that is the funding source for the proposed transaction. The `account_id` is returned in the `/accounts/get` endpoint as well as the [`onSuccess`](https://plaid.com/docs/link/ios/#link-ios-onsuccess-linkSuccess-metadata-accounts-id) callback metadata. This will return an [`INVALID_ACCOUNT_ID`](https://plaid.com/docs/errors/invalid-input/#invalid_account_id) error if the account has been removed at the bank or if the `account_id` is no longer valid.

The unique ID that you would like to use to refer to this transaction. For your convenience mapping your internal data, you could use your internal ID/identifier for this transaction. The max length for this field is 36 characters.

The transaction amount, in USD (e.g. `102.05`)

The payment method specified in the `default_payment_method` field directly impacts the timing recommendations provided by the API for submitting the debit entry to your processor or ODFI. If unspecified, defaults to `STANDARD_ACH`. `SAME_DAY_ACH`: Same Day ACH (as defined by Nacha). The API assumes the settlement will occur on the same business day if the `/signal/schedule` request is submitted by 6:00 PM UTC. Note: The actual cutoff time can vary depending on your payment processor or ODFI. Nacha has established three processing windows for Same Day ACH (UTC): 2:30 PM, 6:45 PM, and 8:45 PM. `STANDARD_ACH`: Standard ACH (as defined by Nacha), typically settled one to three business days after submission. `MULTIPLE_PAYMENT_METHODS`: Indicates that there is no default debit rail or multiple payment methods are available, and the transaction could use any of them based on customer policy or availability.