class singer_sdk.typing.Property[source]

Generic Property. Should be nested within a PropertiesList.

__init__(name, wrapped, required=False, default=None, description=None, secret=False, allowed_values=None, examples=None, *, nullable=None)[source]

Initialize Property object.

Note: Properties containing secrets should be specified with secret=True. Doing so will add the annotation writeOnly=True, in accordance with JSON Schema Draft 7 and later, and secret=True as an additional hint to readers.

More info:

  • name (str) – Property name.

  • wrapped (JSONTypeHelper[T] | type[JSONTypeHelper[T]]) – JSON Schema type of the property.

  • required (bool) – Whether this is a required property.

  • default (T | None) – Default value in the JSON Schema.

  • description (str | None) – Long-text property description.

  • secret (bool | None) – True if this is a credential or other secret.

  • allowed_values (list[T] | None) – A list of allowed value options, if only specific values are permitted. This will define the type as an ‘enum’.

  • examples (list[T] | None) – Optional. A list of one or more sample values. These may be displayed to the user as hints of the expected format of inputs.

  • nullable (bool | None) – If True, the property may be null.

Return type:



Return a dict mapping the property name to its definition.


A JSON Schema dictionary describing the object.

Return type:


property type_dict: dict[source]

Get type dictionary.


A dictionary describing the type.


ValueError – If the type dict is not valid.