Add a first comment to any post

Some posts do better with the link in the first reply instead of the post itself. Octopost can post that reply for you.

Fill in the first comment field in the composer, or send firstComment from the API or MCP. It goes out right after the post (after the last part of a thread): a reply on X, Bluesky, Mastodon and Threads, and a comment on LinkedIn.

Each network's length limit applies to the comment. If the comment fails, the post stays up, and a retry posts only the comment.