> Fetch clean Markdown by appending `.md` to any page URL under https://signalwire.com/docs or requesting it with the HTTP header `Accept: text/markdown`. The root index at https://signalwire.com/docs/llms.txt lists the available documentation indexes. # Parameter The `` noun within the `` verb enables you to: * Pass custom parameters to your payment processor when using a Generic Pay Connector * Include additional ACH payment details not covered by the standard `` verb attributes ## Attributes | Attribute | Type | Default | Description | | --------------- | ------ | ------- | --------------------------------------------- | | `name`required | string | - | The identifier for your custom parameter. | | `value`required | string | - | The value associated with the parameter name. | ## Examples ### Adding custom parameters for generic transaction ```xml ```