| Error Message | Error Code | メソッド | 日本語補足 |
| Invalid URL. | 01 | - | URLが不正 |
| Invalid token. | 02 | - | トークンが不正 |
| Undefined action. | 03 | - | URLが不正 |
| Login required. | 04 | posts/list, posts/edit, posts/delete, sources/*, users/edit, users/logout | ログインが必要 |
| This E-mail is already registered. | 05 | users/register, users/edit | すでに登録されたメールアドレスです。 |
| Username is empty. | 06 | users/register, users/edit | ユーザー名が空 |
| Username must be under 30 letters. | 07 | users/register, users/edit | ユーザー名は30文字以下で |
| E-mail is empty. | 08 | users/login, users/register, users/edit | メールアドレスが空 |
| E-mail must be under 255 letters. | 09 | users/register, users/edit | メールアドレスは255文字以下で |
| Invalid E-mail Address. | 10 | users/register, users/edit | メールアドレスが不正 |
| Invalid email or password. | 11 | users/login | メールかパスワードが違う(認証失敗) |
| Password is empty. | 12 | users/login, users/register, users/edit | パスワードが空 |
| Password must be in between 5 - 20 letters. | 13 | users/register, users/edit | パスワードは5-20文字で |
| Body text is empty. | 14 | posts/generate | 本文が空 |
| Body text must be under 1000 letters. | 15 | posts/generate | 本文は1000文字以内で |
| Post ID is empty. | 16 | posts/generate, posts/getInfo, posts/edit, posts/delete | post_idが空 |
| Post ID is invalid. | 17 | posts/generate, posts/getInfo | post_idが空 |
| Post not found. | 18 | posts/edit, posts/delete | メッセージが見つかりませんでした |
| Page does not exist. | 19 | posts/list, sources/list | そのページは存在しません |
| Private Use is empty. | 20 | posts/edit, sources/edit | プライベートフラグが空 |
| Image height is too short. | 21 | sources/upload | 画像の高さが足りない |
| Image is empty. | 22 | sources/upload | 画像が空 |
| Image upload error! | 23 | sources/upload | アップロードエラー |
| Image width is too long. | 24 | sources/upload | 画像の横幅が長すぎ |
| Invalid binary.Check the image is "jpeg", "png" or "gif" format. | 25 | sources/upload | 画像が不正。jpgかpngかgifで |
| Source ID is empty. | 26 | sources/getImage, sources/getInfo, sources/edit, sources/delete | source_idが空 |
| Source ID is invalid. | 27 | sources/getImage, sources/getInfo | source_idが不正 |
| Source not found. | 28 | sources/delete | アップロード画像が見つからない |
| Phrase is empty. | 29 | sources/upload, sources/edit | フレーズ(画像の読み仮名)が空 |
| Phrase must be under 30 letters. | 30 | sources/upload, sources/edit | フレーズ(画像の読み仮名)は30文字以内で |
| Invalid background color. | 31 | (予約領域) | - |
| Currently under sever maintainance. Please try again later. | 32 | (予約領域) | サーバーメンテナンス時のエラーメッセージ |
| - | 99 | (上記以外。予約領域) | - |