Get Block Attributes in JSON REST API

Answering my own question. Since register_meta() actually appends to meta, not blocks, in the JSON output, I just added a new (redundant) attribute to my block using source:meta where I can manually manage outside the attributes I use to display the block. attributes: { api_coordinates: { type: ‘string’, source: ‘meta’, meta: ‘api_coordinates’, }, //… }