--- search: tags: - Suppressions - POST seo: description: >- Adds up to 1000 addresses to a suppression list. key defaults to the workspace-wide *… Reference for the POST /suppressions endpoint in the AI Inbx API API. sidebar: label: Create suppressions badge: POST title: Create suppressions type: openapi-operation --- Adds up to 1000 addresses to a suppression list. `key` defaults to the workspace-wide `*` list and `scope` to `all`; a `scope` of `optional` blocks only sends marked as unsubscribable, so a marketing opt-out does not stop a password reset. Adding an address that is already listed updates the existing entry rather than duplicating it, and never narrows a wider scope. `space_id` puts the entries on a space's list, which stops that space's sends alone; without it they stop every space's.