diff --git a/src/command.rs b/src/command.rs
index 4d508d4..bf69c05 100644
--- a/src/command.rs
+++ b/src/command.rs
@@ -45,6 +45,24 @@ enum Action {
         #[arg(id = "GUIDE", short = 'g', long = "guide")]
         guide: String,
     },
+
+    /// S'inscrire à un shift
+    #[command(name = "inscrire")]
+    Subscribe {
+        /// L'id du shift
+        #[arg()]
+        id: u64,
+    },
+
+    // should we add an option to (un)subscribe someone else?
+
+    /// Se désinscrire d'un shift
+    #[command(name = "désinscrire")]
+    Unsubscribe {
+        /// L'id du shift
+        #[arg()]
+        id: u64,
+    },
 }
 
 fn parse_date(input: &str) -> Res<DateTime<FixedOffset>> {
@@ -89,7 +107,7 @@ pub fn format_shifts(shifts: Vec<Shift>) -> String {
     output
 }
 
-pub async fn handle(command: impl AsRef<str>, room: Room, client: Client) -> Res<()> {
+pub async fn handle(command: impl AsRef<str>, sender: OwnedUserId, room: Room, client: Client) -> Res<()> {
     debug!("handling command: {}", command.as_ref());
 
     let args = shlex::split(command.as_ref()).ok_or_else(lazyhow!("error: Invalid quoting"))?;
@@ -131,6 +149,18 @@ pub async fn handle(command: impl AsRef<str>, room: Room, client: Client) -> Res
                     send_room_msg_html(client, room, format!("Nouveau shift ajouté : {}", shift))
                         .await?;
                 }
+                Action::Subscribe { id } => {
+                    debug!("user asked for subscribe");
+                    let _ = crate::grist::subscribe(id, sender.to_string()).await?;
+                    debug!("subscribe ok");
+                    // confirm with tick reaction
+                }
+                Action::Unsubscribe { id } => {
+                    debug!("user asked for unsubscribe");
+                    let _ = crate::grist::unsubscribe(id, sender.to_string()).await?;
+                    debug!("unsubscribe ok");
+                    // confirm with tick reaction
+                }
             }
         }
         Err(err) => {
diff --git a/src/grist.rs b/src/grist.rs
index a233992..cf22d91 100644
--- a/src/grist.rs
+++ b/src/grist.rs
@@ -8,6 +8,7 @@ use grist_client::apis::records_api::{add_records, list_records};
 use grist_client::models::{
     RecordsList, RecordsListRecordsInner, RecordsWithoutId, RecordsWithoutIdRecordsInner,
 };
+use serde_json::Value;
 
 pub const API_URL: &str = "https://grist.interhacker.space/api";
 pub const SHIFTS_DOC: &str = "iwSaC82TsQiuD3MYSG9RXX";
@@ -142,14 +143,14 @@ pub struct Shift {
     pub id: Option<u64>,
     pub shift_type: CustomOrDefined,
     pub start_time: DateTime<FixedOffset>,
-    pub inscriptions: Vec<String>,
+    pub inscriptions: Vec<Inscription>,
 }
 impl Shift {
     pub fn new(
         id: u64,
         shift_type: CustomOrDefined,
         start_time: u64,
-        inscriptions: Vec<String>,
+        inscriptions: Vec<Inscription>,
     ) -> Self {
         Self {
             id: Some(id),
@@ -281,6 +282,20 @@ impl Display for Shift {
     }
 }
 
+#[derive(Clone, Debug)]
+pub struct Inscription {
+    pub shift_id: u64,
+    pub person_name: String,
+}
+impl Inscription {
+    pub fn new(shift_id: u64, person_name: String) -> Self {
+        Self {
+            shift_id: shift_id,
+            person_name: person_name,
+        }
+    }
+}
+
 pub fn get_number(record: &RecordsListRecordsInner, column: &str) -> Res<u64> {
     record
         .fields
@@ -341,6 +356,27 @@ pub async fn get_records(doc: &str, table: &str, sort: Option<&str>) -> Res<Reco
         .context("Failed to list records")
 }
 
+pub async fn add_record(doc: &str, table: &str, fields: Vec<(&str, Value)>) -> Res<()> {
+    let mut fields_map = serde_json::Map::new();
+    for (key, val) in fields {
+        fields_map.insert(key.to_string(), val);
+    }
+    let record = RecordsWithoutIdRecordsInner {
+        fields: fields_map.into(),
+    };
+    let records = RecordsWithoutId {
+        records: vec![record],
+    };
+
+    let conf = conf::get();
+    let api_key = conf.grist_api_key();
+    let grist_conf = Configuration::new(API_URL.into(), Some(api_key.into()));
+    add_records(&grist_conf, doc, table, records, None)
+        .await
+        .context("Failed to add inscriptions record")?;
+    Ok(())
+}
+
 pub async fn get_shift_type(index: u64) -> Res<ShiftType> {
     let record_list = get_records(SHIFTS_DOC, SHIFT_TYPES_TABLE, None).await?;
     let record = record_list
@@ -358,16 +394,22 @@ pub async fn get_shift_type(index: u64) -> Res<ShiftType> {
     ))
 }
 
-pub async fn get_inscription(index: u64) -> Res<String> {
-    let record_list = get_records(SHIFTS_DOC, INSCRIPTIONS_TABLE, None).await?;
+pub async fn get_inscriptions() -> Res<RecordsList> {
+    get_records(SHIFTS_DOC, INSCRIPTIONS_TABLE, None).await
+}
+
+pub async fn get_inscription(index: u64) -> Res<Inscription> {
+    let record_list = get_inscriptions().await?;
     let record = record_list
         .records
         .iter()
         .find(|record| record.id == index)
         .ok_or(anyhow!("can't find inscription"))?
         .clone();
-    let name = get_string(&record, "Personne")?.into();
-    Ok(name)
+    Ok(Inscription::new(
+        get_number(&record, "Shift")?,
+        get_string(&record, "Personne")?.into(),
+    ))
 }
 
 pub fn get_shift_type_custom(record: &RecordsListRecordsInner) -> Res<CustomShiftValues> {
@@ -417,3 +459,26 @@ pub async fn list_shifts() -> Res<Vec<Shift>> {
 
     Ok(shifts)
 }
+
+// this is weird that we use both wordings, inscription and (un)subscribe
+pub async fn subscribe(id: u64, user_id: String) -> Res<()> {
+    let inscriptions = get_inscriptions().await?.records;
+    if let Some(_) = inscriptions.into_iter().find(|inscription| {
+        get_number(&inscription, "Shift").expect("failed to get shift column") == id
+            && get_string(&inscription, "Personne").expect("failed to get personne column")
+                == user_id
+    }) {
+        return Ok(());
+    }
+    let fields = vec![
+        ("Shift", serde_json::to_value(id)?),
+        ("Personne", serde_json::to_value(user_id)?),
+    ];
+    add_record(SHIFTS_DOC, INSCRIPTIONS_TABLE, fields).await?;
+
+    Ok(())
+}
+
+pub async fn unsubscribe(id: u64, user_id: String) -> Res<()> {
+    Ok(())
+}
diff --git a/src/serve/message.rs b/src/serve/message.rs
index 8da399a..c80af65 100644
--- a/src/serve/message.rs
+++ b/src/serve/message.rs
@@ -84,7 +84,7 @@ pub async fn on_room_message(
         event.sender, text_content.body, body
     );
 
-    command::handle(body, room, client).await?;
+    command::handle(body, event.sender, room, client).await?;
     debug!("message successfully sent");
 
     Ok(())