server-tools/rpc_helper/readme/USAGE.md

Via code

Decorate an Odoo model class like this:

from odoo.addons.rpc_helper.decorator import disable_rpc

@disable_rpc()
class AverageModel(models.Model):
    _inherit = "avg.model"

This will disable ALL calls.

To selectively disable only some methods:

@disable_rpc("create", "write", "any_method")
class AverageModel(models.Model):
    _inherit = "avg.model"

Via ir.model configuration

See "Configuration" section.