BotKit by Fedify

BotKit is a framework for creating ActivityPub bots. It is powered by Fedify, a lower-level library for creating ActivityPub server applications. Unlike Mastodon bots, BotKit is designed to create a standalone ActivityPub bot, which is a complete ActivityPub server in itself and not limited to Mastodon's capabilities (such as the 500-character limit per post).

BotKit's API is so simple and easy to use that you can create a complete bot in a single TypeScript file. Here's an example of a simple bot that just greets:

import { createBot, mention, text } from "@fedify/botkit";
import { RedisKvStore } from "@fedify/redis";
import { Redis } from "ioredis";

// Create a bot instance:
const bot = createBot<void>({
  // The bot will have fediverse handle "@greetbot@mydomain":
  username: "greetbot",
  // Set the display name:
  name: "Greet Bot",
  // Set the profile icon (avatar):
  icon: new URL("https://mydomain/icon.png"),
  // Set the bio:
  summary: text`Hi, there! I'm a simple fediverse bot created by ${
    mention("@hongminhee@hollo.social")}.`,
  // Use Redis as a key-value store:
  kv: new RedisKvStore(new Redis()),
  // Use Redis as a message queue:
  queue: new RedisMessageQueue(() => new Redis()),
});

// A bot can respond to a mention:
bot.onMention = async (session, message) => {
  await message.reply(text`Hi, ${message.actor}!`);
};

// Or, a bot also can actively publish a post:
const session = bot.getSession("https://mydomain/");
setInterval(async () => {
  await session.publish(text`Hi, folks! It's an hourly greeting.`);
}, 1000 * 60 * 60);

export default bot;

For more information, see the BotKit docs.