diff --git a/src/main/java/com/meteroid/api/Licenses.java b/src/main/java/com/meteroid/api/Licenses.java
index 1321109..4af4741 100644
--- a/src/main/java/com/meteroid/api/Licenses.java
+++ b/src/main/java/com/meteroid/api/Licenses.java
@@ -195,7 +195,8 @@ MeteroidHttpClient.Exchange<License> exchangeRetrieve(
     /**
      * Get a license's activation code
      *
-     * <p>Available until the license is activated or revoked.
+     * <p>Available until the license is activated or revoked; for an ephemeral license, until
+     * revoked.
      *
      * @param licenseId the {@code license_id} path parameter
      * @return the response body
@@ -207,7 +208,8 @@ public LicenseActivationCode retrieveActivationCode(final String licenseId) {
     /**
      * Get a license's activation code
      *
-     * <p>Available until the license is activated or revoked.
+     * <p>Available until the license is activated or revoked; for an ephemeral license, until
+     * revoked.
      *
      * @param licenseId the {@code license_id} path parameter
      * @param requestOptions headers, timeout and retries of this call
@@ -475,7 +477,8 @@ public ApiResponse<License> retrieve(
         /**
          * Get a license's activation code
          *
-         * <p>Available until the license is activated or revoked.
+         * <p>Available until the license is activated or revoked; for an ephemeral license, until
+         * revoked.
          *
          * @param licenseId the {@code license_id} path parameter
          * @return the status, headers and body
@@ -487,7 +490,8 @@ public ApiResponse<LicenseActivationCode> retrieveActivationCode(final String li
         /**
          * Get a license's activation code
          *
-         * <p>Available until the license is activated or revoked.
+         * <p>Available until the license is activated or revoked; for an ephemeral license, until
+         * revoked.
          *
          * @param licenseId the {@code license_id} path parameter
          * @param requestOptions headers, timeout and retries of this call
diff --git a/src/main/java/com/meteroid/api/LicensesAsync.java b/src/main/java/com/meteroid/api/LicensesAsync.java
index 9158a84..56304fd 100644
--- a/src/main/java/com/meteroid/api/LicensesAsync.java
+++ b/src/main/java/com/meteroid/api/LicensesAsync.java
@@ -139,7 +139,8 @@ public CompletableFuture<License> retrieve(
     /**
      * Get a license's activation code
      *
-     * <p>Available until the license is activated or revoked.
+     * <p>Available until the license is activated or revoked; for an ephemeral license, until
+     * revoked.
      *
      * @param licenseId the {@code license_id} path parameter
      * @return the response body, once received
@@ -151,7 +152,8 @@ public CompletableFuture<LicenseActivationCode> retrieveActivationCode(final Str
     /**
      * Get a license's activation code
      *
-     * <p>Available until the license is activated or revoked.
+     * <p>Available until the license is activated or revoked; for an ephemeral license, until
+     * revoked.
      *
      * @param licenseId the {@code license_id} path parameter
      * @param requestOptions headers, timeout and retries of this call
@@ -353,7 +355,8 @@ public CompletableFuture<ApiResponse<License>> retrieve(
         /**
          * Get a license's activation code
          *
-         * <p>Available until the license is activated or revoked.
+         * <p>Available until the license is activated or revoked; for an ephemeral license, until
+         * revoked.
          *
          * @param licenseId the {@code license_id} path parameter
          * @return the status, headers and body, once received
@@ -366,7 +369,8 @@ public CompletableFuture<ApiResponse<LicenseActivationCode>> retrieveActivationC
         /**
          * Get a license's activation code
          *
-         * <p>Available until the license is activated or revoked.
+         * <p>Available until the license is activated or revoked; for an ephemeral license, until
+         * revoked.
          *
          * @param licenseId the {@code license_id} path parameter
          * @param requestOptions headers, timeout and retries of this call
diff --git a/src/main/java/com/meteroid/models/IssueLicenseRequest.java b/src/main/java/com/meteroid/models/IssueLicenseRequest.java
index d0ef579..9269ce3 100644
--- a/src/main/java/com/meteroid/models/IssueLicenseRequest.java
+++ b/src/main/java/com/meteroid/models/IssueLicenseRequest.java
@@ -29,6 +29,10 @@ public final class IssueLicenseRequest {
     @JsonProperty("customer_id")
     private String customerId;
 
+    @JsonProperty("ephemeral_hours")
+    @JsonInclude(JsonInclude.Include.NON_EMPTY)
+    private JsonField<Integer> ephemeralHours = JsonField.missing();
+
     @JsonProperty("instance_id")
     @JsonInclude(JsonInclude.Include.NON_EMPTY)
     private JsonField<String> instanceId = JsonField.missing();
@@ -50,6 +54,7 @@ private IssueLicenseRequest() {}
 
     private IssueLicenseRequest(Builder builder) {
         this.customerId = builder.customerId;
+        this.ephemeralHours = builder.ephemeralHours;
         this.instanceId = builder.instanceId;
         this.offline = builder.offline;
         this.subscriptionId = builder.subscriptionId;
@@ -74,6 +79,7 @@ public static Builder builder() {
     public Builder toBuilder() {
         Builder builder = new Builder();
         builder.customerId = customerId;
+        builder.ephemeralHours = ephemeralHours;
         builder.instanceId = instanceId;
         builder.offline = offline;
         builder.subscriptionId = subscriptionId;
@@ -91,6 +97,18 @@ public String customerId() {
         return Utils.required(customerId, "customer_id");
     }
 
+    /**
+     * Ephemeral, for CI and other short-lived installations: the activation code can be used any
+     * number of times, each activation gets a license of this many hours (1 to 24) for the
+     * installation activating, and nothing is refreshed. Not with <code>offline</code> or <code>
+     * validity_days</code>.
+     *
+     * @return the value, empty when unset or null
+     */
+    public Optional<Integer> ephemeralHours() {
+        return ephemeralHours.asOptional();
+    }
+
     /**
      * Offline only. The installation's id as it reports it, up to 255 characters without spaces:
      * the license names it (<code>aud</code>) and stays bound to it. Without one, the license is
@@ -161,6 +179,7 @@ public boolean equals(Object o) {
         }
         IssueLicenseRequest that = (IssueLicenseRequest) o;
         return Objects.equals(customerId, that.customerId)
+                && Objects.equals(ephemeralHours, that.ephemeralHours)
                 && Objects.equals(instanceId, that.instanceId)
                 && Objects.equals(offline, that.offline)
                 && Objects.equals(subscriptionId, that.subscriptionId)
@@ -172,6 +191,7 @@ public boolean equals(Object o) {
     public int hashCode() {
         return Objects.hash(
                 customerId,
+                ephemeralHours,
                 instanceId,
                 offline,
                 subscriptionId,
@@ -184,6 +204,8 @@ public String toString() {
         return "IssueLicenseRequest{"
                 + "customerId="
                 + customerId
+                + ", ephemeralHours="
+                + ephemeralHours
                 + ", instanceId="
                 + instanceId
                 + ", offline="
@@ -200,6 +222,7 @@ public String toString() {
     /** Builds {@link IssueLicenseRequest}. */
     public static final class Builder {
         private String customerId;
+        private JsonField<Integer> ephemeralHours = JsonField.missing();
         private JsonField<String> instanceId = JsonField.missing();
         private Boolean offline;
         private JsonField<String> subscriptionId = JsonField.missing();
@@ -219,6 +242,20 @@ public Builder customerId(String customerId) {
             return this;
         }
 
+        /**
+         * Ephemeral, for CI and other short-lived installations: the activation code can be used
+         * any number of times, each activation gets a license of this many hours (1 to 24) for the
+         * installation activating, and nothing is refreshed. Not with <code>offline</code> or
+         * <code>validity_days</code>.
+         *
+         * @param ephemeralHours the value, null to send an explicit {@code null}
+         * @return this builder
+         */
+        public Builder ephemeralHours(Integer ephemeralHours) {
+            this.ephemeralHours = JsonField.ofNullable(ephemeralHours);
+            return this;
+        }
+
         /**
          * Offline only. The installation's id as it reports it, up to 255 characters without
          * spaces: the license names it (<code>aud</code>) and stays bound to it. Without one, the
diff --git a/src/main/java/com/meteroid/models/IssueLicenseResponse.java b/src/main/java/com/meteroid/models/IssueLicenseResponse.java
index c27c61a..7203e7f 100644
--- a/src/main/java/com/meteroid/models/IssueLicenseResponse.java
+++ b/src/main/java/com/meteroid/models/IssueLicenseResponse.java
@@ -73,6 +73,7 @@ public Builder toBuilder() {
 
     /**
      * Online: one-time code the customer enters in their installation to activate the license.
+     * Ephemeral: the reusable code, e.g. a CI secret.
      *
      * @return the value, empty when unset or null
      */
@@ -162,6 +163,7 @@ private Builder() {}
 
         /**
          * Online: one-time code the customer enters in their installation to activate the license.
+         * Ephemeral: the reusable code, e.g. a CI secret.
          *
          * @param activationCode the value, null to send an explicit {@code null}
          * @return this builder
diff --git a/src/main/java/com/meteroid/models/License.java b/src/main/java/com/meteroid/models/License.java
index 460ca3b..f396267 100644
--- a/src/main/java/com/meteroid/models/License.java
+++ b/src/main/java/com/meteroid/models/License.java
@@ -39,6 +39,10 @@ public final class License {
     @JsonProperty("customer_name")
     private String customerName;
 
+    @JsonProperty("ephemeral_hours")
+    @JsonInclude(JsonInclude.Include.NON_EMPTY)
+    private JsonField<Integer> ephemeralHours = JsonField.missing();
+
     @JsonProperty("has_activation_code")
     private Boolean hasActivationCode;
 
@@ -86,6 +90,7 @@ private License(Builder builder) {
         this.createdAt = builder.createdAt;
         this.customerId = builder.customerId;
         this.customerName = builder.customerName;
+        this.ephemeralHours = builder.ephemeralHours;
         this.hasActivationCode = builder.hasActivationCode;
         this.id = builder.id;
         this.instanceId = builder.instanceId;
@@ -120,6 +125,7 @@ public Builder toBuilder() {
         builder.createdAt = createdAt;
         builder.customerId = customerId;
         builder.customerName = customerName;
+        builder.ephemeralHours = ephemeralHours;
         builder.hasActivationCode = hasActivationCode;
         builder.id = id;
         builder.instanceId = instanceId;
@@ -171,6 +177,15 @@ public String customerName() {
         return Utils.required(customerName, "customer_name");
     }
 
+    /**
+     * Ephemeral: each activation of the reusable code gets a license of this many hours.
+     *
+     * @return the value, empty when unset or null
+     */
+    public Optional<Integer> ephemeralHours() {
+        return ephemeralHours.asOptional();
+    }
+
     /**
      * Whether the activation code can still be retrieved: only until activation or revocation.
      *
@@ -304,6 +319,7 @@ public boolean equals(Object o) {
                 && Objects.equals(createdAt, that.createdAt)
                 && Objects.equals(customerId, that.customerId)
                 && Objects.equals(customerName, that.customerName)
+                && Objects.equals(ephemeralHours, that.ephemeralHours)
                 && Objects.equals(hasActivationCode, that.hasActivationCode)
                 && Objects.equals(id, that.id)
                 && Objects.equals(instanceId, that.instanceId)
@@ -325,6 +341,7 @@ public int hashCode() {
                 createdAt,
                 customerId,
                 customerName,
+                ephemeralHours,
                 hasActivationCode,
                 id,
                 instanceId,
@@ -350,6 +367,8 @@ public String toString() {
                 + customerId
                 + ", customerName="
                 + customerName
+                + ", ephemeralHours="
+                + ephemeralHours
                 + ", hasActivationCode="
                 + hasActivationCode
                 + ", id="
@@ -383,6 +402,7 @@ public static final class Builder {
         private OffsetDateTime createdAt;
         private String customerId;
         private String customerName;
+        private JsonField<Integer> ephemeralHours = JsonField.missing();
         private Boolean hasActivationCode;
         private String id;
         private JsonField<String> instanceId = JsonField.missing();
@@ -442,6 +462,17 @@ public Builder customerName(String customerName) {
             return this;
         }
 
+        /**
+         * Ephemeral: each activation of the reusable code gets a license of this many hours.
+         *
+         * @param ephemeralHours the value, null to send an explicit {@code null}
+         * @return this builder
+         */
+        public Builder ephemeralHours(Integer ephemeralHours) {
+            this.ephemeralHours = JsonField.ofNullable(ephemeralHours);
+            return this;
+        }
+
         /**
          * Whether the activation code can still be retrieved: only until activation or revocation.
          *
diff --git a/src/test/java/com/meteroid/api/LicensesTest.java b/src/test/java/com/meteroid/api/LicensesTest.java
index 11e08a1..0ae02e6 100644
--- a/src/test/java/com/meteroid/api/LicensesTest.java
+++ b/src/test/java/com/meteroid/api/LicensesTest.java
@@ -15,7 +15,7 @@ void list() throws Exception {
                 new PerseidMock(
                         200,
                         "application/json",
-                        "{\"data\":[{\"auto_issued\":false,\"created_at\":\"2023-12-31T23:59:59.999-05:30\",\"customer_id\":\"customer_id_2\",\"customer_name\":\"sample\",\"has_activation_code\":false,\"id\":\"license_id_0\",\"offline\":false,\"revoked_immediately\":false,\"status\":\"REVOKED\",\"validity_days\":-123456789}]}");
+                        "{\"data\":[{\"auto_issued\":false,\"created_at\":\"2023-12-31T23:59:59.999-05:30\",\"customer_id\":\"customer_id_2\",\"customer_name\":\"sample\",\"has_activation_code\":true,\"id\":\"license_id_78\",\"offline\":false,\"revoked_immediately\":false,\"status\":\"PENDING\",\"validity_days\":2147483647}]}");
         mock.client.licenses().list();
         assertEquals(List.of("GET /api/v1/licenses"), mock.requests);
     }
@@ -26,7 +26,7 @@ void create() throws Exception {
                 new PerseidMock(
                         200,
                         "application/json",
-                        "{\"license\":{\"auto_issued\":false,\"created_at\":\"2023-12-31T23:59:59.999-05:30\",\"customer_id\":\"customer_id_37\",\"customer_name\":\"sample\",\"has_activation_code\":true,\"id\":\"license_id_40\",\"offline\":true,\"revoked_immediately\":true,\"status\":\"PENDING\",\"validity_days\":123456789}}");
+                        "{\"license\":{\"auto_issued\":false,\"created_at\":\"2023-12-31T23:59:59.999-05:30\",\"customer_id\":\"customer_id_37\",\"customer_name\":\"sample\",\"has_activation_code\":true,\"id\":\"license_id_32\",\"offline\":true,\"revoked_immediately\":false,\"status\":\"REVOKED\",\"validity_days\":2147483647}}");
         mock.client
                 .licenses()
                 .create(
@@ -42,7 +42,7 @@ void retrieve() throws Exception {
                 new PerseidMock(
                         200,
                         "application/json",
-                        "{\"auto_issued\":false,\"created_at\":\"2024-03-15T10:30:45.123+02:00\",\"customer_id\":\"customer_id_79\",\"customer_name\":\"sample\",\"has_activation_code\":false,\"id\":\"license_id_90\",\"offline\":false,\"revoked_immediately\":true,\"status\":\"PENDING\",\"validity_days\":-123456789}");
+                        "{\"auto_issued\":false,\"created_at\":\"2024-03-15T10:30:45.123+02:00\",\"customer_id\":\"customer_id_79\",\"customer_name\":\"sample\",\"has_activation_code\":true,\"id\":\"license_id_13\",\"offline\":true,\"revoked_immediately\":false,\"status\":\"PENDING\",\"validity_days\":-2147483648}");
         mock.client.licenses().retrieve("license_id");
         assertEquals(List.of("GET /api/v1/licenses/license_id"), mock.requests);
     }
@@ -74,7 +74,7 @@ void revoke() throws Exception {
                 new PerseidMock(
                         200,
                         "application/json",
-                        "{\"auto_issued\":false,\"created_at\":\"2024-03-15T10:30:45.123+02:00\",\"customer_id\":\"customer_id_79\",\"customer_name\":\"sample\",\"has_activation_code\":false,\"id\":\"license_id_90\",\"offline\":false,\"revoked_immediately\":true,\"status\":\"PENDING\",\"validity_days\":-123456789}");
+                        "{\"auto_issued\":false,\"created_at\":\"2024-03-15T10:30:45.123+02:00\",\"customer_id\":\"customer_id_79\",\"customer_name\":\"sample\",\"has_activation_code\":true,\"id\":\"license_id_13\",\"offline\":true,\"revoked_immediately\":false,\"status\":\"PENDING\",\"validity_days\":-2147483648}");
         mock.client
                 .licenses()
                 .revoke(