GraphQL types

The Platform schema browser lists input objects, return types, enums, and scalars generated from the schema. Follow the type linked from an operation to inspect its fields.

Reading a signature

Notation	Meaning
String	Nullable string
String!	Required, non-null string
[String!]	Nullable list of non-null strings
[String!]!	Required list of non-null strings

An input object describes arguments sent to an operation. An output object describes fields you can select in its response. Use the enum values and custom scalar formats defined by that endpoint.

Identifiers and amounts

Treat identifier types as part of the contract: an internal numeric card ID, issuer UUID, and organization UUID identify different records. Read each amount field's documented unit; a token amount in base units and a spending limit in cents require different conversions.

For cards partner types, use the partner schema browser and the partner guides.