| slack-bot-user-oauth-access-token | Bot User OAuth Access Token | yes | — |
| slack-channel | Channel | yes | — |
| slack-text | Text | no | — |
| slack-blocks | Blocks | no | — |
| slack-optional-attachments | https://api.slack.com/methods/chat.postMessage#arg_attachments | no | — |
| slack-optional-blocks | https://api.slack.com/methods/chat.postMessage#arg_blocks | no | — |
| slack-optional-icon_emoji | https://api.slack.com/methods/chat.postMessage#arg_icon_emoji | no | — |
| slack-optional-icon_url | https://api.slack.com/methods/chat.postMessage#arg_icon_url | no | — |
| slack-optional-link_names | https://api.slack.com/methods/chat.postMessage#arg_link_names | no | — |
| slack-optional-mrkdwn | https://api.slack.com/methods/chat.postMessage#arg_mrkdwn | no | — |
| slack-optional-parse | https://api.slack.com/methods/chat.postMessage#arg_parse | no | — |
| slack-optional-reply_broadcast | https://api.slack.com/methods/chat.postMessage#arg_reply_broadcast | no | — |
| slack-optional-thread_ts | https://api.slack.com/methods/chat.postMessage#arg_thread_ts | no | — |
| slack-optional-unfurl_links | https://api.slack.com/methods/chat.postMessage#arg_unfurl_links | no | — |
| slack-optional-unfurl_media | https://api.slack.com/methods/chat.postMessage#arg_unfurl_media | no | — |
| slack-optional-username | https://api.slack.com/methods/chat.postMessage#arg_username | no | — |
| slack-function | send-message (https://api.slack.com/methods/chat.postMessage) or send-reaction (https://api.slack.com/methods/reactions.add) or update-message (https://api.slack.com/methods/chat.update) or upload-file (https://api.slack.com/methods/files.upload) | no | — |
| slack-upload-file-path | https://api.slack.com/methods/files.upload#arg_file | no | — |
| slack-upload-filename | https://api.slack.com/methods/files.upload#arg_filename | no | — |
| slack-upload-file-title | https://api.slack.com/methods/files.upload#arg_title | no | — |
| slack-upload-initial-comment | https://api.slack.com/methods/files.upload#arg_initial_comment | no | — |
| slack-emoji-name | https://api.slack.com/methods/reactions.add#arg_name | no | — |
| slack-message-timestamp | https://api.slack.com/methods/reactions.add#arg_timestamp" | no | — |
| slack-update-message-ts | https://api.slack.com/methods/chat.update#ts | no | — |
| slack-update-message-text | https://api.slack.com/methods/chat.update#text | no | — |
| slack-update-message-blocks | https://api.slack.com/methods/chat.update#blocks | no | — |