This instance couldn't reach its API specification on the last attempt, so this page shows the copy fetched before that. Anything added or changed since then is missing here, and the reference updates itself as soon as the specification is readable again. Last fetched 2026-10-22 22:52 UTC.
A model the API reference uses in a request or a response. The operation pages link every field typed as this model here.
A single merchant-defined custom field carried on a transaction: the name of the merchant's
field definition and the value captured for this transaction.
Values
Values:Values combine: send one or more member names separated by a comma and a space, or the integer sum of their values. Responses carry the names.
Fields
Field
Type
Description
idrequired
string (uuid)
Identifier of the custom-field entry.nullable
Values:Values combine: send one or more member names separated by a comma and a space, or the integer sum of their values. Responses carry the names.
namerequired
string
Name of the merchant's custom-field definition this value belongs to. Required, at most
50 characters, and free of control characters. On the authenticated API the name must match
an enabled custom-field definition configured for the transaction's merchant.nullablemax length 50
Values:Values combine: send one or more member names separated by a comma and a space, or the integer sum of their values. Responses carry the names.
valuerequired
string
Value captured for the field. At most 300 characters and free of control characters;
printable punctuation is accepted. Any narrower format constraint comes from the regular
expression and maximum length on the merchant's field definition.nullablemax length 300
Values:Values combine: send one or more member names separated by a comma and a space, or the integer sum of their values. Responses carry the names.
valuesrequired
array of stringarray of
The list of values captured for a multi-value field, in the order submitted. At most 250
items; each item is at most 300 characters, non-empty and free of control characters.
Accepted only when the merchant's field definition is flagged multi-value, where the
definition's own maximum length, regular expression and value cap apply to every item.nullablemax items 250
Values:Values combine: send one or more member names separated by a comma and a space, or the integer sum of their values. Responses carry the names.
This model has no documented fields.
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