add_reaction
Input
emoji requiredA single unicode emoji, e.g. a thumbs up. Limited to a set of common emoji (thumbs up/down, heart, laughing, fire, 100, eyes, check mark, clap, party popper, thinking, and a few more); an emoji outside that set is refused with a clear reason. Custom server emoji are not supported.
messageUrl requiredFull message url, e.g. https://discord.com/channels/<guildId>/<channelId>/<messageId>. discord.com/read_messages returns the ids to build one. A forum or thread post's own opening message (where the channelId and messageId are equal) is not supported and is refused; react to a reply inside the post instead.
remove optionalLeave false (the default) to add your reaction. Set true to take your own reaction off; other people's reactions are never touched.
Default: falseOutput
emoji requiredreacted requiredWhether your reaction is on the message after this run.
channelId requiredmessageId requiredalready_present requiredTrue when the message was already in the requested state, so nothing was written.
count optionalHow many people have reacted with this emoji afterwards; null once no one has.
request_seen optionalWhether Discord confirmed the change.
FAQ
Search Discord server messages
Search one Discord server's message history with Discord's own search, as the signed-in account, newest first. Search by words (content), and narrow by authors, channels, mentioned users and content type, each given as ids: get user ids from discord.com/get_member_list and channel ids from discord.com/list_channels. Returns one page of up to 25 matching messages with their author, text, time and link, Discord's total count of matches, and next_offset to read the next page (null on the last one). Fails with a clear error when the browser is not signed in to Discord, when the account is not a member of the server or can see no text channel in it, or when Discord is still indexing the server. Direct messages are not searched.
Read Discord messages
Reads the most recent messages of a Discord channel or direct message (author, timestamp, text), newest first, scrolling up to load more until the requested count. Requires being logged in. A DM or group DM is read the same way: pass its url from discord.com/list_dms. It also reads a thread or a forum post, since both are channels in their own right: pass the post's url (from discord.com/list_forum_posts) and you get its replies plus the opening post, newest first — there is no separate thread-reading script. To list the posts of a forum channel rather than its messages, use discord.com/list_forum_posts instead.
Post a Discord message
Posts a text message, optionally with a file attached, in a Discord channel addressed by its URL. Requires being logged in to Discord. Returns `sent` plus the created message's messageId, channelId, timestamp and content as Discord stored it. The message is visible to everyone who can see the channel. Empty messages and messages over 2000 characters are refused with a clear reason. Use dry_run to check a channel and message without posting.