diff --git a/Cargo.lock b/Cargo.lock
index 8111779..4eda5b2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -584,9 +584,9 @@ checksum = "db13adb97ab515a3691f56e4dbab09283d0b86cb45abd991d8634a9d6f501760"
 
 [[package]]
 name = "libc"
-version = "0.2.132"
+version = "0.2.147"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8371e4e5341c3a96db127eb2465ac681ced4c433e01dd0e938adbef26ba93ba5"
+checksum = "b4668fb0ea861c1df094127ac5f1da3409a82116a4ba74fca2e58ef927159bb3"
 
 [[package]]
 name = "lock_api"
diff --git a/src/cmd_check_missing.rs b/src/cmd_check_missing.rs
index ce57ffd..b42c9f2 100644
--- a/src/cmd_check_missing.rs
+++ b/src/cmd_check_missing.rs
@@ -13,6 +13,7 @@ pub async fn check_missing(args: CheckMissingArgs) {
         .sticker_sets
         .iter()
         .map(|pack_id| {
+            println!("{}", pack_id);
             return (pack_id, config.sticker_sets.get(pack_id).unwrap());
         })
         .collect();
diff --git a/src/cmd_deploy.rs b/src/cmd_deploy.rs
index 128f95b..bf0372a 100644
--- a/src/cmd_deploy.rs
+++ b/src/cmd_deploy.rs
@@ -1,8 +1,9 @@
-use crate::creds::Creds;
 use crate::deploy_discord::deploy_discord;
+use crate::deploy_mastodon::deploy_mastodon;
 use crate::deploy_telegram::deploy_telegram;
 use crate::sticker_config::StickerConfig;
 
+use std::collections::HashMap;
 use std::fs::File;
 use std::path::PathBuf;
 
@@ -16,9 +17,16 @@ pub async fn deploy(args: crate::args::DeployArgs) {
 
     let config: StickerConfig =
         serde_yaml::from_reader(config_file).expect("could not parse stickers.yml");
-    let creds: Creds = serde_yaml::from_reader(creds_file).expect("could not parse creds.yml");
+    let creds: HashMap<String, String> =
+        serde_yaml::from_reader(creds_file).expect("could not parse creds.yml");
 
-    for deploy_id in args.deploy_ids.into_iter() {
+    let mut deploy_ids = args.deploy_ids;
+
+    if deploy_ids.is_empty() {
+        deploy_ids = config.deploy_where.keys().cloned().collect::<Vec<String>>();
+    }
+
+    for deploy_id in deploy_ids.into_iter() {
         let sticker_config = config.clone();
 
         match sticker_config
@@ -48,6 +56,16 @@ pub async fn deploy(args: crate::args::DeployArgs) {
                 )
                 .await;
             }
+            "mastodon" => {
+                println!("deploying {} to mastodon", &deploy_id);
+                deploy_mastodon(
+                    deploy_id,
+                    sticker_config,
+                    creds.clone(),
+                    args.folder.clone(),
+                )
+                .await;
+            }
             _ => {
                 panic!("deploy_to not set")
             }
diff --git a/src/creds.rs b/src/creds.rs
deleted file mode 100644
index f27554a..0000000
--- a/src/creds.rs
+++ /dev/null
@@ -1,7 +0,0 @@
-use serde::Deserialize;
-
-#[derive(Debug, Clone, Deserialize)]
-pub struct Creds {
-    pub discord_bot_token: String,
-    pub telegram_bot_token: String,
-}
diff --git a/src/deploy_discord.rs b/src/deploy_discord.rs
index f7b1412..c69d006 100644
--- a/src/deploy_discord.rs
+++ b/src/deploy_discord.rs
@@ -1,4 +1,3 @@
-use crate::creds::Creds;
 use crate::sticker_config::{DiscordDeployLocation, Sticker, StickerConfig, StickerType};
 use indexmap::IndexMap;
 use serenity::http::client::Http as DiscordClient;
@@ -79,16 +78,12 @@ fn split_by(
 pub async fn deploy_discord(
     deploy_id: String,
     sticker_config: StickerConfig,
-    creds: Creds,
+    creds: HashMap<String, String>,
     base_stickerdb_path: String,
 ) {
-    let discord_token = creds.discord_bot_token.as_str();
-    let discord_client = DiscordClient::new(discord_token);
-    //let discord_cache = DiscordCache::new()
-
     let deploy_where = sticker_config.deploy_where.get(&deploy_id).unwrap();
     let deploy_locations = deploy_where.discord.as_ref().unwrap().clone();
-    let deploy_locations_map: HashMap<_, _> = deploy_locations
+    let deploy_locations_map: HashMap<String, &DiscordDeployLocation> = deploy_locations
         .iter()
         .map(|loc| (loc.deploy_name.clone(), loc))
         .collect();
@@ -152,6 +147,9 @@ pub async fn deploy_discord(
 
         let deploy_location = deploy_locations_map.get(&deploy_name).unwrap();
 
+        let discord_token = creds.get(&deploy_location.credential_name).unwrap();
+        let discord_client = DiscordClient::new(discord_token);
+
         let deploy_emoji_names: Vec<String> = deploy_emojis
             .iter()
             .map(|deploy_emoji| deploy_emoji.0.clone())
diff --git a/src/deploy_mastodon.rs b/src/deploy_mastodon.rs
new file mode 100644
index 0000000..985cfd3
--- /dev/null
+++ b/src/deploy_mastodon.rs
@@ -0,0 +1,142 @@
+use std::{collections::HashMap, io::Read, path::PathBuf, process::Command};
+
+use crate::{
+    mastodon_api::{AdminEmoji, MastodonAPI},
+    sticker_config::{Sticker, StickerConfig},
+};
+
+fn convert_to_png(path: PathBuf) -> Vec<u8> {
+    let output = Command::new("convert")
+        .args([
+            "-format",
+            "png",
+            "-resize",
+            "128x128",
+            path.as_os_str().to_str().unwrap(),
+            "png:-",
+        ])
+        .output()
+        .expect("failed to execute process");
+
+    if !output.status.success() {
+        panic!(
+            "failed to run convert, stderr: {}",
+            String::from_utf8_lossy(&output.stderr)
+        );
+    }
+
+    output.stdout
+}
+
+pub async fn deploy_mastodon(
+    deploy_id: String,
+    sticker_config: StickerConfig,
+    creds: HashMap<String, String>,
+    base_stickerdb_path: String,
+) {
+    let deploy_where = sticker_config.deploy_where.get(&deploy_id).unwrap();
+
+    let deploy_location = deploy_where.mastodon.as_ref().unwrap();
+
+    let pack_contents = sticker_config
+        .sticker_sets
+        .get(&deploy_where.pack_id)
+        .unwrap();
+
+    let pack_stickers: HashMap<String, Sticker> = pack_contents
+        .iter()
+        .map(|sticker_name| {
+            return (
+                sticker_name.clone(),
+                sticker_config.stickers.get(sticker_name).unwrap().clone(),
+            );
+        })
+        .collect();
+
+    let token = creds.get(&deploy_location.credential_name).unwrap();
+
+    let mastodon_api = MastodonAPI::new(token.to_string(), deploy_location.api_base.clone());
+
+    let filter = vec!["domain:local".to_string()];
+
+    let mut mastodon_emojis = mastodon_api
+        .get_custom_emoji(&filter)
+        .await
+        .expect("could not get custom emojis");
+
+    // Delete emojis which have been removed from list
+    {
+        let invalid_emojis: Vec<AdminEmoji> = mastodon_emojis
+            .clone()
+            .into_iter()
+            .filter(|emoji| {
+                !(pack_contents.contains(&emoji.shortcode)
+                    || emoji.category != deploy_location.category)
+            })
+            .collect();
+
+        for invalid_emoji in invalid_emojis.iter() {
+            println!("Deleting emoji with name {}", &invalid_emoji.shortcode);
+            mastodon_api
+                .delete_custom_emoji(&invalid_emoji.id)
+                .await
+                .expect("could not delete emoji");
+        }
+    }
+
+    if let Some(category) = &deploy_location.category {
+        mastodon_emojis = mastodon_emojis
+            .into_iter()
+            .filter(|emoji| emoji.category.is_some())
+            .filter(|emoji| emoji.category == Some(category.to_string()))
+            .collect();
+    } else {
+        mastodon_emojis = mastodon_emojis
+            .into_iter()
+            .filter(|emoji| emoji.category.is_none())
+            .collect()
+    }
+
+    // add emoji that arent in mastodon_emojis
+    {
+        let missing_emoji: Vec<String> = pack_contents
+            .clone()
+            .into_iter()
+            .filter(|emoji_name| {
+                for emoji in mastodon_emojis.iter() {
+                    if &emoji.shortcode == emoji_name {
+                        return false;
+                    }
+                }
+                true
+            })
+            .collect();
+
+        for emoji_name in missing_emoji.iter() {
+            println!("Uploading Emoji: {}", emoji_name);
+            let sticker_data = pack_stickers.get(emoji_name).unwrap();
+
+            let file_path = PathBuf::from(&base_stickerdb_path).join(&sticker_data.file);
+
+            let mut file_data: Vec<u8>;
+            if file_path.extension().unwrap() != "png" {
+                file_data = convert_to_png(file_path);
+            } else {
+                file_data = Vec::new();
+
+                let mut file = std::fs::File::open(file_path).unwrap();
+                file.read_to_end(&mut file_data)
+                    .expect("could not read file");
+            }
+
+            mastodon_api
+                .upload_emoji(
+                    emoji_name.clone(),
+                    deploy_location.category.clone(),
+                    file_data,
+                )
+                .await
+                .expect("could not upload emoji");
+        }
+    }
+}
diff --git a/src/deploy_telegram.rs b/src/deploy_telegram.rs
index 906ced1..7729156 100644
--- a/src/deploy_telegram.rs
+++ b/src/deploy_telegram.rs
@@ -3,7 +3,6 @@ use std::ops::Index;
 use std::{collections::HashMap, error::Error};
 
 use crate::{
-    creds::Creds,
     sticker_config::{Sticker, StickerConfig, StickerType},
     tg_api::{TelegramAPI, TelegramSticker},
 };
@@ -56,7 +55,7 @@ impl TelegramStickerIDState {
 pub async fn deploy_telegram(
     deploy_id: String,
     sticker_config: StickerConfig,
-    creds: Creds,
+    creds: HashMap<String, String>,
     base_stickerdb_path: String,
 ) {
     let mut tg_state = TelegramStickerIDState::new(&base_stickerdb_path);
@@ -106,7 +105,9 @@ pub async fn deploy_telegram(
         panic!("too many stickers in pack");
     }
 
-    let tg_bot = TelegramAPI::new(creds.telegram_bot_token);
+    let token = creds.get(&deploy_location.credential_name).unwrap();
+
+    let tg_bot = TelegramAPI::new(token.to_string());
     let tg_sticker_set = tg_bot
         .get_sticker_set(&deploy_location.name)
         .await
@@ -241,7 +242,7 @@ pub async fn deploy_telegram(
             tg_state.set(&new_sticker.file_unique_id, sticker_name);
 
             tg_stickers.push((
-                sticker_name.clone(),
+                sticker_name.to_string(),
                 tg_new_sticker_set
                     .stickers
                     .index(new_sticker_position_base + i)
diff --git a/src/main.rs b/src/main.rs
index d678e8f..816fb50 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,9 +2,10 @@ pub mod args;
 pub mod cmd_check_missing;
 pub mod cmd_createtg;
 pub mod cmd_deploy;
-pub mod creds;
 pub mod deploy_discord;
+pub mod deploy_mastodon;
 pub mod deploy_telegram;
+pub mod mastodon_api;
 pub mod sticker_config;
 pub mod tg_api;
 
@@ -21,11 +22,12 @@ async fn main() {
 
     if args.debug {
         let subscriber = tracing_subscriber::fmt()
-        .with_max_level(tracing::Level::DEBUG)
-        .compact()
-        .finish();
+            .with_max_level(tracing::Level::DEBUG)
+            .pretty()
+            .finish();
 
-        tracing::subscriber::set_global_default(subscriber).expect("setting tracing default failed");
+        tracing::subscriber::set_global_default(subscriber)
+            .expect("setting tracing default failed");
     }
 
     match args.command {
diff --git a/src/mastodon_api.rs b/src/mastodon_api.rs
new file mode 100644
index 0000000..0638da7
--- /dev/null
+++ b/src/mastodon_api.rs
@@ -0,0 +1,168 @@
+use reqwest::multipart::Part;
+use serde::{Deserialize, Serialize};
+use std::{collections::HashMap, error::Error};
+
+// API docs taken from https://github.com/superseriousbusiness/gotosocial/blob/main/docs/api/swagger.yaml
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct MastodonErrorResp {
+    pub error: String,
+}
+
+impl MastodonErrorResp {
+    fn to_error(&self, error_code: u16) -> MastodonAPIError {
+        MastodonAPIError::new(self.error.clone(), error_code)
+    }
+}
+
+#[derive(Debug)]
+struct MastodonAPIError {
+    error: String,
+    error_code: u16,
+}
+
+impl MastodonAPIError {
+    fn new(error: String, error_code: u16) -> MastodonAPIError {
+        MastodonAPIError { error, error_code }
+    }
+}
+
+impl std::fmt::Display for MastodonAPIError {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        write!(f, "{}: {}", self.error_code, self.error)
+    }
+}
+
+impl Error for MastodonAPIError {
+    fn description(&self) -> &str {
+        self.error.as_str()
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct AdminEmoji {
+    pub id: String,
+    pub category: Option<String>,
+    pub shortcode: String,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Emoji {
+    pub category: Option<String>,
+    pub shortcode: String,
+}
+
+pub struct MastodonAPI {
+    token: String,
+    api_base: String,
+    client: reqwest::Client,
+}
+
+impl MastodonAPI {
+    pub fn new(token: String, api_base: String) -> Self {
+        Self {
+            token,
+            api_base,
+            client: reqwest::Client::builder()
+                .user_agent("stickerdeploy")
+                .build()
+                .unwrap(),
+        }
+    }
+
+    pub async fn get_custom_emoji(
+        &self,
+        filter: &[String],
+    ) -> Result<Vec<AdminEmoji>, Box<dyn Error>> {
+        let url = format!("{}/api/v1/admin/custom_emojis", self.api_base);
+
+        let mut query: HashMap<String, String> = HashMap::new();
+        query.insert("filter".to_string(), filter.join(","));
+        query.insert("limit".to_string(), "0".to_string());
+
+        let res = self
+            .client
+            .get(url)
+            .header(
+                "Authorization".to_string(),
+                format!("Bearer {}", self.token).to_string(),
+            )
+            .query(&query)
+            .send()
+            .await?;
+
+        let status = res.status();
+        if status.is_success() {
+            let json = res.json::<Vec<AdminEmoji>>().await?;
+
+            Ok(json)
+        } else {
+            let json = res.json::<MastodonErrorResp>().await?;
+
+            Err(Box::new(json.to_error(status.as_u16())))
+        }
+    }
+
+    pub async fn delete_custom_emoji(&self, id: &String) -> Result<(), Box<dyn Error>> {
+        let url = format!("{}/api/v1/admin/custom_emojis/{}", self.api_base, id);
+
+        let res = self
+            .client
+            .delete(url)
+            .header(
+                "Authorization".to_string(),
+                format!("Bearer {}", self.token).to_string(),
+            )
+            .send()
+            .await?;
+
+        let status = res.status();
+        if !status.is_success() {
+            let json = res.json::<MastodonErrorResp>().await?;
+
+            Err(Box::new(json.to_error(status.as_u16())))
+        } else {
+            Ok(())
+        }
+    }
+
+    pub async fn upload_emoji(
+        &self,
+        shortcode: String,
+        category: Option<String>,
+        file_data: Vec<u8>,
+    ) -> Result<Emoji, Box<dyn Error>> {
+        let url = format!("{}/api/v1/admin/custom_emojis", self.api_base);
+
+        let mut form = reqwest::multipart::Form::new();
+        form = form.text("shortcode", shortcode.clone());
+        if let Some(category) = category {
+            form = form.text("category", category);
+        } else {
+            form = form.text("category", "");
+        }
+        form = form.part("image", Part::bytes(file_data).file_name("test.png"));
+
+        let res = self
+            .client
+            .post(url)
+            .header(
+                "Authorization".to_string(),
+                format!("Bearer {}", self.token).to_string(),
+            )
+            .multipart(form)
+            .send()
+            .await?;
+
+        let status = res.status();
+        if status.is_success() {
+            let json = res.json::<Emoji>().await?;
+
+            Ok(json)
+        } else {
+            let json = res.json::<MastodonErrorResp>().await?;
+
+            Err(Box::new(json.to_error(status.as_u16())))
+        }
+    }
+}
diff --git a/src/sticker_config.rs b/src/sticker_config.rs
index ffaefbb..b1224d4 100644
--- a/src/sticker_config.rs
+++ b/src/sticker_config.rs
@@ -15,26 +15,50 @@ pub struct DeployWhere {
     pub deploy_to: String,
     pub discord: Option<Vec<DiscordDeployLocation>>,
     pub telegram: Option<TelegramDeployLocation>,
+    pub mastodon: Option<MastodonDeployLocation>,
 }
 
 #[derive(Debug, Clone, Deserialize)]
 pub struct TelegramDeployLocation {
-    pub deploy_name: String,
+    #[serde(default = "telegram_credential_name_default")]
+    pub credential_name: String,
     pub r#type: StickerType,
     pub name: String,
     pub user_id: u64,
 }
 
+fn telegram_credential_name_default() -> String {
+    "telegram".to_string()
+}
+
+#[derive(Debug, Clone, Deserialize)]
+pub struct MastodonDeployLocation {
+    pub api_base: String,
+    #[serde(default = "mastodon_credential_name_default")]
+    pub credential_name: String,
+    pub category: Option<String>,
+}
+
+fn mastodon_credential_name_default() -> String {
+    "mastodon".to_string()
+}
+
 #[derive(Debug, Clone, Deserialize)]
 pub struct DiscordDeployLocation {
     pub deploy_name: String,
     pub id: u64,
+    #[serde(default = "discord_credential_name_default")]
+    pub credential_name: String,
     #[serde(default = "discord_max_regular_emoji_default")]
     pub max_regular_emoji: u64,
     #[serde(default = "discord_max_animated_emoji_default")]
     pub max_animated_emoji: u64,
 }
 
+fn discord_credential_name_default() -> String {
+    "discord".to_string()
+}
+
 fn discord_max_regular_emoji_default() -> u64 {
     50
 }