Run discord-self-bot-console in Node.js example - https://github.com/rigwild/discord-self-bot-console/discussions/4

index.js

const fetch = require('node-fetch')

{
  const apiPrefix = 'https://discord.com/api/v9'

  var delay = ms => new Promise(res => setTimeout(res, ms))
  var qs = obj =>
    Object.entries(obj)
      .map(([k, v]) => `${k}=${v}`)
      .join('&')

  const apiCall = (apiPath, body, method = 'GET') => {
    if (!authHeader)
      throw new Error("The authorization token is missing. Did you forget set it? `authHeader = 'your_token'`")
    return fetch(`${apiPrefix}${apiPath}`, {
      body: body ? JSON.stringify(body) : undefined,
      method,
      headers: {
        Accept: '*/*',
        'Accept-Language': 'en-US',
        Authorization: authHeader,
        'Content-Type': 'application/json',
        'User-Agent': isBotAccount
          ? 'DiscordBot (https://github.com/discordjs/discord.js, 12.5.3) Node.js/v14.15.1'
          : 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) discord/1.0.9003 Chrome/91.0.4472.164 Electron/13.4.0 Safari/537.36'
      }
    })
      .then(res => res.json().catch(() => {}))
      .catch(console.error)
  }

  var api = {
    getMessages: (channelOrThreadId, limit = 100, params = {}) => apiCall(`/channels/${channelOrThreadId}/messages?limit=${limit}&${qs(params)}`),
    sendMessage: (channelOrThreadId, message, tts, body = {}) => apiCall(`/channels/${channelOrThreadId}/messages`, { content: message, tts: !!tts, ...body }, 'POST'),
    replyToMessage: (channelOrThreadId, repliedMessageId, message, tts, body = {}) =>
      apiCall(`/channels/${channelOrThreadId}/messages`, { content: message, message_reference: { message_id: repliedMessageId }, tts: !!tts, ...body }, 'POST'),
    editMessage: (channelOrThreadId, messageId, newMessage, body = {}) => apiCall(`/channels/${channelOrThreadId}/messages/${messageId}`, { content: newMessage, ...body }, 'PATCH'),
    deleteMessage: (channelOrThreadId, messageId) => apiCall(`/channels/${channelOrThreadId}/messages/${messageId}`, null, 'DELETE'),

    createThread: (channelId, toOpenThreadInmessageId, name, auto_archive_duration = 1440, body = {}) =>
      apiCall(`/channels/${channelId}/messages/${toOpenThreadInmessageId}/threads`, { name, auto_archive_duration, location: 'Message', type: 11, ...body }, 'POST'),
    createThreadWithoutMessage: (channelId, name, auto_archive_duration = 1440, body = {}) =>
      apiCall(`/channels/${channelId}/threads`, { name, auto_archive_duration, location: 'Message', type: 11, ...body }, 'POST'),
    deleteThread: threadId => apiCall(`/channels/${threadId}`, null, 'DELETE'),

    // Use this generator: https://discord.club/dashboard
    // Click `+` at the bottom in the embed section then copy the `embed` key in the JSON output.
    sendEmbed: (channelOrThreadId, embed = { title: 'Title', description: 'Description' }) => apiCall(`/channels/${channelOrThreadId}/messages`, { embed }, 'POST'),

    auditLog: guildId => apiCall(`/guilds/${guildId}/audit-logs`),

    getRoles: guildId => apiCall(`/guilds/${guildId}/roles`),
    createRole: (guildId, name) => apiCall(`/guilds/${guildId}/roles`, { name }, 'POST'),
    deleteRole: (guildId, roleId) => apiCall(`/guilds/${guildId}/roles/${roleId}`, null, 'DELETE'),

    getBans: guildId => apiCall(`/guilds/${guildId}/bans`),
    banUser: (guildId, userId, reason) => apiCall(`/guilds/${guildId}/bans/${userId}`, { delete_message_days: '7', reason }, 'PUT'),
    unbanUser: (guildId, userId) => apiCall(`/guilds/${guildId}/bans/${userId}`, null, 'DELETE'),
    kickUser: (guildId, userId) => apiCall(`/guilds/${guildId}/members/${userId}`, null, 'DELETE'),

    addRole: (guildId, userId, roleId) => apiCall(`/guilds/${guildId}/members/${userId}/roles/${roleId}`, null, 'PUT'),
    removeRole: (guildId, userId, roleId) => apiCall(`/guilds/${guildId}/members/${userId}/roles/${roleId}`, null, 'DELETE'),

    getChannels: guildId => apiCall(`/guilds/${guildId}/channels`),
    createChannel: (guildId, name, type) => apiCall(`/guilds/${guildId}/channels`, { name, type }, 'POST'),
    deleteChannel: channelId => apiCall(`/channels/${channelId}`, null, 'DELETE'),

    pinnedMessages: channelId => apiCall(`/channels/${channelId}/pins`),
    addPin: (channelId, messageId) => apiCall(`/channels/${channelId}/pins/${messageId}`, null, 'PUT'),
    deletePin: (channelId, messageId) => apiCall(`/channels/${channelId}/pins/${messageId}`, null, 'DELETE'),

    listEmojis: guildId => apiCall(`/guilds/${guildId}/emojis`),
    getEmoji: (guildId, emojiId) => apiCall(`/guilds/${guildId}/emojis/${emojiId}`),
    createEmoji: (guildId, name, image, roles) => apiCall(`/guilds/${guildId}`, { name, image, roles }, 'POST'),
    editEmoji: (guildId, emojiId, name, roles) => apiCall(`/guilds/${guildId}/${emojiId}`, { name, roles }, 'PATCH'),
    deleteEmoji: (guildId, emojiId) => apiCall(`/guilds/${guildId}/${emojiId}`, null, 'DELETE'),

    changeNick: (guildId, nick) => apiCall(`/guilds/${guildId}/members/@me/nick`, { nick }, 'PATCH'),
    leaveServer: guildId => apiCall(`/users/@me/guilds/${guildId}`, null, 'DELETE'),

    getDMs: () => apiCall(`/users/@me/channels`),
    getUser: userId => apiCall(`/users/${userId}`),

    getCurrentUser: () => apiCall('/users/@me'),
    editCurrentUser: (username, avatar) => apiCall('/users/@me', { username, avatar }, 'PATCH'),
    listCurrentUserGuilds: () => apiCall('/users/@me/guilds'),

    listReactions: (channelOrThreadId, messageId, emojiUrl) => apiCall(`/channels/${channelOrThreadId}/messages/${messageId}/reactions/${emojiUrl}/@me`),
    addReaction: (channelOrThreadId, messageId, emojiUrl) => apiCall(`/channels/${channelOrThreadId}/messages/${messageId}/reactions/${emojiUrl}/@me`, null, 'PUT'),
    deleteReaction: (channelOrThreadId, messageId, emojiUrl) => apiCall(`/channels/${channelOrThreadId}/messages/${messageId}/reactions/${emojiUrl}/@me`, null, 'DELETE'),

    typing: channelOrThreadId => apiCall(`/channels/${channelOrThreadId}/typing`, null, 'POST'),

    delay,
    apiCall
  }

  // Is the account a bot?
  var isBotAccount = true

  // Set your `Authorization` token here
  var authHeader = '<<<YOUR AUTH HEADER HERE>>>'

  if (isBotAccount) authHeader = `Bot ${authHeader}`
}
// End of api

// Your script
;(async () => {
  // Send 10 messages
  let channelId = '826934811846377545'
  for (i = 0; i < 5; i++) {
    const res = await api.sendMessage(channelId, `hey! ${i}`)
    console.log(res)
    await delay(100)
  }
})()

package.json

{
  "name": "hey",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "node-fetch": "^2.6.6"
  }
}