Google: Gets the specified message — response body — payload

Gets the specified message.: response body, field payload. Complete fields and constraints for contract 2026-10-27.

API reference · Contract 2026-10-27

SDK schema: Gets the specified message — response body — payload

Field	Type	Presence	Description and constraints
`$`	object	Root	A single MIME message part.
`body`	Model	Optional	Expand Gets the specified message attachment — response body The message part body for this part, which may be empty for container MIME message parts.
`filename`	string	Optional	The filename of the attachment. Only present if this message part represents an attachment.
`headers`	array	Optional	List of headers on this message part. For the top-level message part, representing the entire message payload, it will contain the standard RFC 2822 email headers such as `To`, `From`, and `Subject`.
`headers[]`	Model	Each item	Expand Gets the specified message — response body — payload headers item
`mimeType`	string	Optional	The MIME type of the message part.
`partId`	string	Optional	The immutable ID of the message part.
`parts`	array	Optional	The child MIME message parts of this part. This only applies to container MIME message parts, for example `multipart/*`. For non- container MIME message part types, such as `text/plain`, this field is empty. For more information, see RFC 1521.
`parts[]`	Model	Each item	Expand Gets the specified message — response body — payload