# syn marketplace > "Manage workflow marketplace registries." Manage workflow marketplace registries. ## `syn marketplace add` Register a GitHub repo as a workflow marketplace. ```bash syn marketplace add ``` **Arguments:** | Name | Type | Required | Description | |------|------|----------|-------------| | `repo` | `text` | Yes | GitHub repo (org/repo shorthand) | **Options:** | Flag | Type | Default | Description | |------|------|---------|-------------| | `--ref`, `-r` | `text` | `main` | Git branch or tag | | `--name`, `-n` | `text` | --- | Override registry name | --- ## `syn marketplace list` List registered marketplace registries. ```bash syn marketplace list ``` --- ## `syn marketplace refresh` Force-refresh cached marketplace indexes. ```bash syn marketplace refresh ``` **Arguments:** | Name | Type | Required | Description | |------|------|----------|-------------| | `name` | `text` | No | Registry name (refreshes all if omitted) | --- ## `syn marketplace remove` Remove a registered marketplace. ```bash syn marketplace remove ``` **Arguments:** | Name | Type | Required | Description | |------|------|----------|-------------| | `name` | `text` | Yes | Registry name to remove | ---