diff --git a/docs/features/kalender.md b/docs/features/kalender.md
index 1aa2909..b617169 100644
--- a/docs/features/kalender.md
+++ b/docs/features/kalender.md
@@ -6,7 +6,7 @@ Månedsbasert kalendervisning for redaksjonell planlegging. Hendelser er nodes i
 
 ## 2. Status
 **Kalendervisning implementert (mars 2026).** Bruker `scheduled`-edges i stedet for
-separat `calendar_events`-tabell. Abonnement og ICS-eksport gjenstår.
+separat `calendar_events`-tabell. CalDAV/ICS-abonnement implementert. ICS-eksport gjenstår.
 
 ### Implementert
 - **Fase 1 (v1, mars 2025):** PG-adapter med `calendars` + `calendar_events` (legacy)
@@ -23,6 +23,16 @@ separat `calendar_events`-tabell. Abonnement og ICS-eksport gjenstår.
   - Lenke fra mottak-siden med hendelsesteller
   - Tilgang via `nodeVisibility` (respekterer `node_access`-matrise)
   - Sanntidsoppdatering via WebSocket (PG LISTEN/NOTIFY)
+- **ICS-import (oppgave 29.11):** `synops-calendar` CLI som parser ICS-filer
+  - Input: `--file <ics>` eller `--url <url>` + `--collection-id <uuid>`
+  - Duplikatdeteksjon via `metadata.ics_uid`
+  - Oppdatering ved re-import
+- **CalDAV-abonnement (oppgave 29.12):** Periodisk polling av eksterne kalendere
+  - Abonnement lagres i `metadata.calendar_subscriptions[]` på samlingsnoder
+  - `calendar_poller` i maskinrommet sjekker hvert 60. sekund
+  - Enqueuer `calendar_poll`-jobber som spawner `synops-calendar --url`
+  - API: `POST /intentions/configure_calendar_subscription` og `remove_calendar_subscription`
+  - Støtter Google Calendar, Outlook, og andre ICS/CalDAV-URLer
 
 ### Gjenstår — Fase 2
 - Kobling til kanban-kort (vis deadline på kalender)
@@ -32,7 +42,7 @@ separat `calendar_events`-tabell. Abonnement og ICS-eksport gjenstår.
 - Flerdag-hendelser (vises over flere celler)
 - Abonnementsmodell (kalender → kalender via graph_edges)
 - Personlige vs. delte kalendere (via samlings-noder)
-- ICS/CalDAV-eksport
+- ICS-eksport (offentlige kalendere → `/cal/{id}.ics`)
 - Varsler/påminnelser via jobbkøen
 
 ## 3. Datamodell (implementert)
diff --git a/maskinrommet/src/calendar_poller.rs b/maskinrommet/src/calendar_poller.rs
new file mode 100644
index 0000000..20d1d03
--- /dev/null
+++ b/maskinrommet/src/calendar_poller.rs
@@ -0,0 +1,247 @@
+// Calendar-poller — periodisk polling av CalDAV/ICS-kalendere.
+//
+// Finner samlinger med metadata.calendar_subscriptions og enqueuer
+// calendar_poll-jobber for abonnementer som er klare for ny polling
+// (basert på intervall og siste poll).
+//
+// Samlingens metadata-format:
+// ```json
+// {
+//   "calendar_subscriptions": [
+//     {
+//       "url": "https://calendar.google.com/calendar/ical/.../basic.ics",
+//       "interval_minutes": 60,
+//       "last_polled_at": null,
+//       "enabled": true
+//     }
+//   ]
+// }
+// ```
+//
+// Ref: docs/features/kalender.md, tools/synops-calendar/
+
+use chrono::{DateTime, Utc};
+use serde::{Deserialize, Serialize};
+use sqlx::PgPool;
+use uuid::Uuid;
+
+/// En enkelt kalender-subscription på en samling.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct CalendarSubscription {
+    pub url: String,
+    #[serde(default = "default_interval")]
+    pub interval_minutes: u32,
+    pub last_polled_at: Option<DateTime<Utc>>,
+    #[serde(default)]
+    pub enabled: Option<bool>,
+}
+
+fn default_interval() -> u32 {
+    60
+}
+
+/// Rad fra spørring: samling med calendar_subscriptions.
+#[derive(sqlx::FromRow)]
+struct CollectionWithCalendars {
+    id: Uuid,
+    created_by: Uuid,
+    calendar_subscriptions: serde_json::Value,
+}
+
+/// Start periodisk kalender-poller i bakgrunnen.
+/// Sjekker hvert 60. sekund for abonnementer som trenger ny polling.
+pub fn start_calendar_poller(db: PgPool) {
+    tokio::spawn(async move {
+        // Vent 90 sekunder etter oppstart (forskjøvet fra feed-poller)
+        tokio::time::sleep(std::time::Duration::from_secs(90)).await;
+        tracing::info!("Calendar-poller startet (intervall: 60s)");
+
+        loop {
+            match poll_due_calendars(&db).await {
+                Ok(count) => {
+                    if count > 0 {
+                        tracing::info!(calendars = count, "Calendar-poller: {} kalendere lagt i kø", count);
+                    }
+                }
+                Err(e) => {
+                    tracing::error!(error = %e, "Calendar-poller feilet");
+                }
+            }
+
+            tokio::time::sleep(std::time::Duration::from_secs(60)).await;
+        }
+    });
+}
+
+/// Finn samlinger med calendar_subscriptions og enqueue jobber for forfalne abonnementer.
+async fn poll_due_calendars(db: &PgPool) -> Result<usize, String> {
+    let collections: Vec<CollectionWithCalendars> = sqlx::query_as(
+        r#"
+        SELECT id, created_by, metadata->'calendar_subscriptions' as calendar_subscriptions
+        FROM nodes
+        WHERE node_kind = 'collection'
+          AND metadata ? 'calendar_subscriptions'
+          AND jsonb_array_length(metadata->'calendar_subscriptions') > 0
+        "#,
+    )
+    .fetch_all(db)
+    .await
+    .map_err(|e| format!("Kunne ikke hente samlinger med calendar_subscriptions: {e}"))?;
+
+    let mut enqueued = 0usize;
+    let now = Utc::now();
+
+    for collection in &collections {
+        let subs: Vec<CalendarSubscription> =
+            serde_json::from_value(collection.calendar_subscriptions.clone()).unwrap_or_default();
+
+        for (idx, sub) in subs.iter().enumerate() {
+            if sub.enabled == Some(false) {
+                continue;
+            }
+
+            let due = match sub.last_polled_at {
+                Some(last) => {
+                    let elapsed = now.signed_duration_since(last);
+                    elapsed.num_minutes() >= sub.interval_minutes as i64
+                }
+                None => true,
+            };
+
+            if !due {
+                continue;
+            }
+
+            // Sjekk at det ikke allerede finnes en kjørende/ventende jobb
+            let existing: Option<i64> = sqlx::query_scalar(
+                r#"
+                SELECT COUNT(*) FROM job_queue
+                WHERE job_type = 'calendar_poll'
+                  AND payload->>'url' = $1
+                  AND payload->>'collection_id' = $2
+                  AND status IN ('pending', 'running', 'retry')
+                "#,
+            )
+            .bind(&sub.url)
+            .bind(collection.id.to_string())
+            .fetch_one(db)
+            .await
+            .map_err(|e| format!("Kunne ikke sjekke eksisterende calendar_poll-jobb: {e}"))?;
+
+            if existing.unwrap_or(0) > 0 {
+                tracing::debug!(
+                    url = %sub.url,
+                    collection_id = %collection.id,
+                    "Calendar-poll allerede i kø, hopper over"
+                );
+                continue;
+            }
+
+            let payload = serde_json::json!({
+                "url": sub.url,
+                "collection_id": collection.id.to_string(),
+                "created_by": collection.created_by.to_string(),
+                "subscription_index": idx,
+            });
+
+            crate::jobs::enqueue(db, "calendar_poll", payload, Some(collection.id), 3)
+                .await
+                .map_err(|e| format!("Kunne ikke enqueue calendar_poll: {e}"))?;
+
+            tracing::info!(
+                url = %sub.url,
+                collection_id = %collection.id,
+                "Calendar-poll enqueued"
+            );
+
+            enqueued += 1;
+        }
+    }
+
+    Ok(enqueued)
+}
+
+/// Håndterer calendar_poll-jobb — spawner synops-calendar CLI med --url.
+///
+/// Payload: { url, collection_id, created_by, subscription_index }
+pub async fn handle_calendar_poll(
+    job: &crate::jobs::JobRow,
+    db: &PgPool,
+) -> Result<serde_json::Value, String> {
+    let url = job.payload.get("url")
+        .and_then(|v| v.as_str())
+        .ok_or("Mangler url i payload")?;
+
+    let collection_id = job.payload.get("collection_id")
+        .and_then(|v| v.as_str())
+        .ok_or("Mangler collection_id i payload")?;
+
+    let subscription_index = job.payload.get("subscription_index")
+        .and_then(|v| v.as_u64())
+        .unwrap_or(0) as usize;
+
+    let collection_uuid: Uuid = collection_id.parse()
+        .map_err(|e| format!("Ugyldig collection_id: {e}"))?;
+
+    let bin = std::env::var("SYNOPS_CALENDAR_BIN")
+        .unwrap_or_else(|_| "synops-calendar".to_string());
+    let mut cmd = tokio::process::Command::new(&bin);
+
+    cmd.arg("--url").arg(url)
+        .arg("--collection-id").arg(collection_id);
+
+    crate::cli_dispatch::set_database_url(&mut cmd)?;
+
+    tracing::info!(
+        url = %url,
+        collection_id = %collection_id,
+        "Starter synops-calendar (URL-modus)"
+    );
+
+    let result = crate::cli_dispatch::run_cli_tool(&bin, &mut cmd).await?;
+
+    // Oppdater last_polled_at
+    if let Err(e) = update_last_polled(db, collection_uuid, subscription_index).await {
+        tracing::warn!(error = %e, "Kunne ikke oppdatere last_polled_at for kalender");
+    }
+
+    let created = result["created"].as_u64().unwrap_or(0);
+    let updated = result["updated"].as_u64().unwrap_or(0);
+    tracing::info!(
+        url = %url,
+        created = created,
+        updated = updated,
+        "synops-calendar fullført"
+    );
+
+    Ok(result)
+}
+
+/// Oppdater last_polled_at for et spesifikt kalender-abonnement.
+async fn update_last_polled(
+    db: &PgPool,
+    collection_id: Uuid,
+    subscription_index: usize,
+) -> Result<(), String> {
+    let now = Utc::now().to_rfc3339();
+
+    sqlx::query(
+        r#"
+        UPDATE nodes
+        SET metadata = jsonb_set(
+            metadata,
+            $2::text[],
+            to_jsonb($3::text)
+        )
+        WHERE id = $1
+        "#,
+    )
+    .bind(collection_id)
+    .bind(&["calendar_subscriptions".to_string(), subscription_index.to_string(), "last_polled_at".to_string()])
+    .bind(&now)
+    .execute(db)
+    .await
+    .map_err(|e| format!("Kunne ikke oppdatere last_polled_at: {e}"))?;
+
+    Ok(())
+}
diff --git a/maskinrommet/src/intentions.rs b/maskinrommet/src/intentions.rs
index 7862ab9..c697774 100644
--- a/maskinrommet/src/intentions.rs
+++ b/maskinrommet/src/intentions.rs
@@ -5006,6 +5006,197 @@ pub async fn remove_feed_subscription(
     })))
 }
 
+// =============================================================================
+// Kalender-abonnement (oppgave 29.12)
+// =============================================================================
+
+#[derive(Deserialize)]
+pub struct ConfigureCalendarSubscriptionRequest {
+    /// Samlings-ID
+    pub collection_id: Uuid,
+    /// Kalender-URL (ICS/CalDAV)
+    pub url: String,
+    /// Poll-intervall i minutter (default: 60)
+    #[serde(default = "default_calendar_interval")]
+    pub interval_minutes: u32,
+    /// Aktivert (default: true)
+    #[serde(default = "default_true")]
+    pub enabled: bool,
+}
+
+fn default_calendar_interval() -> u32 { 60 }
+
+#[derive(Deserialize)]
+pub struct RemoveCalendarSubscriptionRequest {
+    /// Samlings-ID
+    pub collection_id: Uuid,
+    /// Kalender-URL å fjerne
+    pub url: String,
+}
+
+/// POST /intentions/configure_calendar_subscription
+///
+/// Legger til eller oppdaterer et kalender-abonnement på en samling.
+/// Lagres i samlingens `metadata.calendar_subscriptions[]`.
+pub async fn configure_calendar_subscription(
+    State(state): State<AppState>,
+    user: AuthUser,
+    Json(req): Json<ConfigureCalendarSubscriptionRequest>,
+) -> Result<Json<serde_json::Value>, (StatusCode, Json<ErrorResponse>)> {
+    if !req.url.starts_with("http://") && !req.url.starts_with("https://") {
+        return Err(bad_request("Kalender-URL må starte med http:// eller https://"));
+    }
+    if req.interval_minutes < 15 {
+        return Err(bad_request("Intervall må være minst 15 minutter"));
+    }
+
+    // Sjekk at samlingen eksisterer og er en samling
+    let collection: Option<(String, serde_json::Value)> = sqlx::query_as(
+        "SELECT node_kind, COALESCE(metadata, '{}'::jsonb) FROM nodes WHERE id = $1",
+    )
+    .bind(req.collection_id)
+    .fetch_optional(&state.db)
+    .await
+    .map_err(|e| {
+        tracing::error!(error = %e, "PG-feil ved oppslag av samling");
+        internal_error("Kunne ikke slå opp samling")
+    })?;
+
+    let (kind, metadata) = collection.ok_or_else(|| bad_request("Samling ikke funnet"))?;
+    if kind != "collection" {
+        return Err(bad_request("Noden er ikke en samling"));
+    }
+
+    // Les eksisterende abonnementer
+    let mut subs: Vec<crate::calendar_poller::CalendarSubscription> = metadata
+        .get("calendar_subscriptions")
+        .and_then(|v| serde_json::from_value(v.clone()).ok())
+        .unwrap_or_default();
+
+    let new_sub = crate::calendar_poller::CalendarSubscription {
+        url: req.url.clone(),
+        interval_minutes: req.interval_minutes,
+        last_polled_at: None,
+        enabled: Some(req.enabled),
+    };
+
+    if let Some(existing) = subs.iter_mut().find(|s| s.url == req.url) {
+        existing.interval_minutes = req.interval_minutes;
+        existing.enabled = Some(req.enabled);
+        tracing::info!(url = %req.url, "Kalender-abonnement oppdatert");
+    } else {
+        subs.push(new_sub);
+        tracing::info!(url = %req.url, "Kalender-abonnement lagt til");
+    }
+
+    // Skriv tilbake til metadata
+    sqlx::query(
+        r#"
+        UPDATE nodes
+        SET metadata = jsonb_set(
+            COALESCE(metadata, '{}'::jsonb),
+            '{calendar_subscriptions}',
+            $2
+        )
+        WHERE id = $1
+        "#,
+    )
+    .bind(req.collection_id)
+    .bind(serde_json::to_value(&subs).unwrap())
+    .execute(&state.db)
+    .await
+    .map_err(|e| {
+        tracing::error!(error = %e, "Kunne ikke oppdatere calendar_subscriptions");
+        internal_error("Kunne ikke lagre kalender-abonnement")
+    })?;
+
+    tracing::info!(
+        collection_id = %req.collection_id,
+        url = %req.url,
+        user = %user.node_id,
+        interval = req.interval_minutes,
+        "Kalender-abonnement konfigurert"
+    );
+
+    Ok(Json(serde_json::json!({
+        "status": "ok",
+        "collection_id": req.collection_id,
+        "url": req.url,
+        "interval_minutes": req.interval_minutes,
+        "enabled": req.enabled,
+        "subscriptions_count": subs.len(),
+    })))
+}
+
+/// POST /intentions/remove_calendar_subscription
+///
+/// Fjerner et kalender-abonnement fra en samling.
+pub async fn remove_calendar_subscription(
+    State(state): State<AppState>,
+    user: AuthUser,
+    Json(req): Json<RemoveCalendarSubscriptionRequest>,
+) -> Result<Json<serde_json::Value>, (StatusCode, Json<ErrorResponse>)> {
+    let metadata: Option<serde_json::Value> = sqlx::query_scalar(
+        "SELECT COALESCE(metadata, '{}'::jsonb) FROM nodes WHERE id = $1 AND node_kind = 'collection'",
+    )
+    .bind(req.collection_id)
+    .fetch_optional(&state.db)
+    .await
+    .map_err(|e| {
+        tracing::error!(error = %e, "PG-feil");
+        internal_error("Kunne ikke hente samling")
+    })?;
+
+    let metadata = metadata.ok_or_else(|| bad_request("Samling ikke funnet"))?;
+
+    let mut subs: Vec<crate::calendar_poller::CalendarSubscription> = metadata
+        .get("calendar_subscriptions")
+        .and_then(|v| serde_json::from_value(v.clone()).ok())
+        .unwrap_or_default();
+
+    let before = subs.len();
+    subs.retain(|s| s.url != req.url);
+
+    if subs.len() == before {
+        return Err(bad_request("Kalender-abonnement ikke funnet"));
+    }
+
+    sqlx::query(
+        r#"
+        UPDATE nodes
+        SET metadata = jsonb_set(
+            COALESCE(metadata, '{}'::jsonb),
+            '{calendar_subscriptions}',
+            $2
+        )
+        WHERE id = $1
+        "#,
+    )
+    .bind(req.collection_id)
+    .bind(serde_json::to_value(&subs).unwrap())
+    .execute(&state.db)
+    .await
+    .map_err(|e| {
+        tracing::error!(error = %e, "Kunne ikke oppdatere calendar_subscriptions");
+        internal_error("Kunne ikke fjerne kalender-abonnement")
+    })?;
+
+    tracing::info!(
+        collection_id = %req.collection_id,
+        url = %req.url,
+        user = %user.node_id,
+        "Kalender-abonnement fjernet"
+    );
+
+    Ok(Json(serde_json::json!({
+        "status": "ok",
+        "collection_id": req.collection_id,
+        "url": req.url,
+        "removed": true,
+        "subscriptions_count": subs.len(),
+    })))
+}
+
 // =============================================================================
 // Tester
 // =============================================================================
diff --git a/maskinrommet/src/jobs.rs b/maskinrommet/src/jobs.rs
index 4bf4991..98a70e6 100644
--- a/maskinrommet/src/jobs.rs
+++ b/maskinrommet/src/jobs.rs
@@ -230,6 +230,10 @@ async fn dispatch(
         "feed_poll" => {
             crate::feed_poller::handle_feed_poll(job, db).await
         }
+        // Calendar-polling: periodisk CalDAV/ICS-abonnement (oppgave 29.12)
+        "calendar_poll" => {
+            crate::calendar_poller::handle_calendar_poll(job, db).await
+        }
         // Orchestration: trigger-evaluering har lagt jobben i kø.
         // Kompilatoren parser scriptet og validerer det.
         // Utførelse av kompilert script kommer i oppgave 24.5.
diff --git a/maskinrommet/src/main.rs b/maskinrommet/src/main.rs
index 7e0e9a0..b15453f 100644
--- a/maskinrommet/src/main.rs
+++ b/maskinrommet/src/main.rs
@@ -29,6 +29,7 @@ pub mod summarize;
 pub mod ws;
 pub mod mixer;
 pub mod feed_poller;
+pub mod calendar_poller;
 pub mod orchestration_trigger;
 mod webhook;
 mod webhook_admin;
@@ -170,6 +171,9 @@ async fn main() {
 
     // Start feed-poller for RSS/Atom-abonnementer (oppgave 29.3)
     feed_poller::start_feed_poller(db.clone());
+
+    // Start calendar-poller for CalDAV/ICS-abonnementer (oppgave 29.12)
+    calendar_poller::start_calendar_poller(db.clone());
     let dynamic_page_cache = publishing::new_dynamic_page_cache();
     let metrics = metrics::MetricsCollector::new();
 
@@ -284,6 +288,9 @@ async fn main() {
         // Feed-abonnement (oppgave 29.3)
         .route("/intentions/configure_feed_subscription", post(intentions::configure_feed_subscription))
         .route("/intentions/remove_feed_subscription", post(intentions::remove_feed_subscription))
+        // Kalender-abonnement (oppgave 29.12)
+        .route("/intentions/configure_calendar_subscription", post(intentions::configure_calendar_subscription))
+        .route("/intentions/remove_calendar_subscription", post(intentions::remove_calendar_subscription))
         .route("/intentions/compile_script", post(intentions::compile_script))
         .route("/intentions/test_orchestration", post(intentions::test_orchestration))
         .route("/intentions/ai_suggest_script", post(intentions::ai_suggest_script))
diff --git a/migrations/031_calendar_subscriptions.sql b/migrations/031_calendar_subscriptions.sql
new file mode 100644
index 0000000..b3e4a77
--- /dev/null
+++ b/migrations/031_calendar_subscriptions.sql
@@ -0,0 +1,30 @@
+-- 031_calendar_subscriptions.sql
+-- Oppgave 29.12: CalDAV-abonnement — periodisk polling av eksterne kalendere.
+-- Kalenderabonnementer lagres i samlingens metadata.calendar_subscriptions[],
+-- etter samme mønster som feed_subscriptions (oppgave 29.3).
+--
+-- Inneholder:
+--   1. Indeks for rask oppslag av calendar_subscriptions
+--   2. Prioritetsregel for calendar_poll-jobber
+--
+-- Ref: docs/features/kalender.md, tools/synops-calendar/
+
+BEGIN;
+
+-- =============================================================================
+-- 1. Indeks for rask oppslag av samlinger med calendar_subscriptions
+-- =============================================================================
+CREATE INDEX IF NOT EXISTS idx_nodes_calendar_subscriptions
+    ON nodes ((metadata->'calendar_subscriptions'))
+    WHERE node_kind = 'collection' AND metadata ? 'calendar_subscriptions';
+
+-- =============================================================================
+-- 2. Prioritetsregel for calendar_poll-jobber
+-- =============================================================================
+-- Lav prioritet (3), lav CPU-vekt, maks 2 samtidige, 120s timeout.
+-- Kalender-polling er bakgrunnsarbeid som ikke haster.
+INSERT INTO job_priority_rules (job_type, base_priority, cpu_weight, max_concurrent, timeout_seconds)
+VALUES ('calendar_poll', 3, 1, 2, 120)
+ON CONFLICT (job_type) DO NOTHING;
+
+COMMIT;
diff --git a/tasks.md b/tasks.md
index 548ab2c..56b57e2 100644
--- a/tasks.md
+++ b/tasks.md
@@ -413,8 +413,7 @@ noden er det som lever videre.
 
 ### Kalender-import
 - [x] 29.11 ICS-import: `synops-calendar` CLI som parser ICS-fil og oppretter noder med `scheduled`-edges. Input: `--file <ics> --collection-id <uuid>`. Duplikatdeteksjon via UID. Oppdatering ved re-import.
-- [~] 29.12 CalDAV-abonnement: abonner på ekstern CalDAV-kalender (Google, Outlook). Poller periodisk, synkroniserer endringer. Som RSS-feed men for kalenderhendelser.
-  > Påbegynt: 2026-03-18T22:55
+- [x] 29.12 CalDAV-abonnement: abonner på ekstern CalDAV-kalender (Google, Outlook). Poller periodisk, synkroniserer endringer. Som RSS-feed men for kalenderhendelser.
 
 ## Fase 30: Podcast-hosting — komplett, uten ekstern avhengighet
 
diff --git a/tools/synops-calendar/Cargo.toml b/tools/synops-calendar/Cargo.toml
index 5f8f8d1..129cda4 100644
--- a/tools/synops-calendar/Cargo.toml
+++ b/tools/synops-calendar/Cargo.toml
@@ -18,3 +18,4 @@ serde_json = "1"
 tokio = { version = "1", features = ["full"] }
 tracing = "0.1"
 ical = "0.11"
+reqwest = { version = "0.12", features = ["rustls-tls"], default-features = false }
diff --git a/tools/synops-calendar/src/main.rs b/tools/synops-calendar/src/main.rs
index f77f2ce..18f6742 100644
--- a/tools/synops-calendar/src/main.rs
+++ b/tools/synops-calendar/src/main.rs
@@ -6,7 +6,8 @@
 //
 // Bruk:
 //   synops-calendar --file kalender.ics --collection-id <uuid>
-//   synops-calendar --payload-json '{"file":"kalender.ics","collection_id":"..."}'
+//   synops-calendar --url https://calendar.google.com/...ical --collection-id <uuid>
+//   synops-calendar --payload-json '{"url":"...","collection_id":"..."}'
 //
 // Output: JSON til stdout med antall opprettet/oppdatert/feilet.
 // Feil: stderr + exit code != 0.
@@ -18,18 +19,21 @@ use clap::Parser;
 use ical::parser::ical::component::IcalEvent;
 use serde::{Deserialize, Serialize};
 use sqlx::PgPool;
-use std::fs::File;
 use std::io::BufReader;
 use uuid::Uuid;
 
 /// Importer ICS-fil til kalendernoder.
 #[derive(Parser)]
-#[command(name = "synops-calendar", about = "Importer ICS-fil til kalendernoder i Synops")]
+#[command(name = "synops-calendar", about = "Importer ICS-fil eller CalDAV-URL til kalendernoder i Synops")]
 struct Cli {
     /// Sti til ICS-fil
     #[arg(long)]
     file: Option<String>,
 
+    /// URL til ICS/CalDAV-kalender (hentes via HTTP GET)
+    #[arg(long)]
+    url: Option<String>,
+
     /// Samlings-ID (node som hendelsene tilhører)
     #[arg(long)]
     collection_id: Option<Uuid>,
@@ -41,7 +45,10 @@ struct Cli {
 
 #[derive(Deserialize)]
 struct JobPayload {
-    file: String,
+    #[serde(default)]
+    file: Option<String>,
+    #[serde(default)]
+    url: Option<String>,
     collection_id: String,
 }
 
@@ -63,13 +70,19 @@ struct ImportResult {
     errors: Vec<String>,
 }
 
+/// Kilde for ICS-data.
+enum IcsSource {
+    File(String),
+    Url(String),
+}
+
 #[tokio::main]
 async fn main() {
     synops_common::logging::init("synops_calendar");
 
     let cli = Cli::parse();
 
-    let (file_path, collection_id) = if let Some(ref json_str) = cli.payload_json {
+    let (source, collection_id) = if let Some(ref json_str) = cli.payload_json {
         let payload: JobPayload = serde_json::from_str(json_str).unwrap_or_else(|e| {
             eprintln!("Ugyldig --payload-json: {e}");
             std::process::exit(1);
@@ -78,34 +91,69 @@ async fn main() {
             eprintln!("Ugyldig collection_id i payload: {e}");
             std::process::exit(1);
         });
-        (payload.file, cid)
+        let source = if let Some(url) = payload.url {
+            IcsSource::Url(url)
+        } else if let Some(file) = payload.file {
+            IcsSource::File(file)
+        } else {
+            eprintln!("Payload må inneholde 'url' eller 'file'");
+            std::process::exit(1);
+        };
+        (source, cid)
+    } else if let Some(url) = cli.url {
+        let cid = cli.collection_id.unwrap_or_else(|| {
+            eprintln!("Mangler --collection-id");
+            std::process::exit(1);
+        });
+        (IcsSource::Url(url), cid)
     } else {
         let file = cli.file.unwrap_or_else(|| {
-            eprintln!("Mangler --file");
+            eprintln!("Mangler --file eller --url");
             std::process::exit(1);
         });
         let cid = cli.collection_id.unwrap_or_else(|| {
             eprintln!("Mangler --collection-id");
             std::process::exit(1);
         });
-        (file, cid)
+        (IcsSource::File(file), cid)
     };
 
-    // Parse ICS-filen
-    let events = parse_ics(&file_path);
+    // Hent ICS-data
+    let ics_data = match &source {
+        IcsSource::File(path) => {
+            std::fs::read_to_string(path).unwrap_or_else(|e| {
+                eprintln!("Kunne ikke lese {path}: {e}");
+                std::process::exit(1);
+            })
+        }
+        IcsSource::Url(url) => {
+            tracing::info!(url = %url, "Henter ICS fra URL");
+            fetch_ics(url).await.unwrap_or_else(|e| {
+                eprintln!("Kunne ikke hente {url}: {e}");
+                std::process::exit(1);
+            })
+        }
+    };
+
+    // Parse ICS-data
+    let events = parse_ics_data(&ics_data);
 
     if events.is_empty() {
         let output = ImportResult {
             ok: true,
             created: 0,
             updated: 0,
-            errors: vec!["Ingen VEVENT funnet i ICS-filen".to_string()],
+            errors: vec!["Ingen VEVENT funnet i ICS-data".to_string()],
         };
         println!("{}", serde_json::to_string_pretty(&output).unwrap());
         return;
     }
 
-    tracing::info!(events = events.len(), file = %file_path, "Parsed ICS-fil");
+    let source_label = match &source {
+        IcsSource::File(path) => path.clone(),
+        IcsSource::Url(url) => url.clone(),
+    };
+    tracing::info!(events = events.len(), source = %source_label, "Parsed ICS-data");
 
     // Koble til database
     let db = synops_common::db::connect().await.unwrap_or_else(|e| {
@@ -164,6 +212,37 @@ async fn main() {
     }
 }
 
+/// Hent ICS-data fra en URL via HTTP GET.
+async fn fetch_ics(url: &str) -> Result<String, String> {
+    let client = reqwest::Client::builder()
+        .timeout(std::time::Duration::from_secs(30))
+        .build()
+        .map_err(|e| format!("Kunne ikke opprette HTTP-klient: {e}"))?;
+
+    let response = client
+        .get(url)
+        .header("User-Agent", "synops-calendar/0.1")
+        .send()
+        .await
+        .map_err(|e| format!("HTTP-forespørsel feilet: {e}"))?;
+
+    if !response.status().is_success() {
+        return Err(format!("HTTP {}: {}", response.status(), url));
+    }
+
+    let body = response
+        .text()
+        .await
+        .map_err(|e| format!("Kunne ikke lese respons: {e}"))?;
+
+    // Enkel validering: sjekk at det ser ut som ICS
+    if !body.contains("BEGIN:VCALENDAR") {
+        return Err(format!("Responsen ser ikke ut som ICS-data (mangler BEGIN:VCALENDAR)"));
+    }
+
+    Ok(body)
+}
+
 enum EventAction {
     Created,
     Updated,
@@ -290,14 +369,9 @@ async fn import_event(
     }
 }
 
-/// Parse ICS-fil og returner liste med hendelser.
-fn parse_ics(path: &str) -> Vec<CalendarEvent> {
-    let file = File::open(path).unwrap_or_else(|e| {
-        eprintln!("Kunne ikke åpne {path}: {e}");
-        std::process::exit(1);
-    });
-
-    let reader = BufReader::new(file);
+/// Parse ICS-data fra en streng og returner liste med hendelser.
+fn parse_ics_data(data: &str) -> Vec<CalendarEvent> {
+    let reader = BufReader::new(data.as_bytes());
     let parser = ical::IcalParser::new(reader);
 
     let mut events = Vec::new();