diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6af0fb8895..f1fab664b6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 # Changelog
 
+## Unreleased
+
+**Bug Fixes**:
+
+- Stop collecting the `has_profile` metrics tag & reporting outcomes for it. ([#4365](https://github.com/getsentry/relay/pull/4365))
+
+**Features**:
+
+- Add data categories for Uptime and Attachment Items. ([#4363](https://github.com/getsentry/relay/pull/4363), [#4374](https://github.com/getsentry/relay/pull/4374))
+
 ## 24.11.2
 
 **Breaking Changes**:
@@ -12,7 +22,6 @@
 - Accept incoming requests even if there was an error fetching their project config. ([#4140](https://github.com/getsentry/relay/pull/4140))
 - Rate limit profiles when transaction was sampled. ([#4195](https://github.com/getsentry/relay/pull/4195))
 - Fix scrubbing user paths in minidump debug module names. ([#4351](https://github.com/getsentry/relay/pull/4351))
-- Stop collecting the `has_profile` metrics tag & reporting outcomes for it. ([#4365](https://github.com/getsentry/relay/pull/4365))
 - Scrub user fields in span.sentry_tags. ([#4364](https://github.com/getsentry/relay/pull/4364)), ([#4370](https://github.com/getsentry/relay/pull/4370))
 
 **Features**:
@@ -22,7 +31,6 @@
 
 **Internal**:
 
-- Adds the UPTIME DataCategory ([#4363](https://github.com/getsentry/relay/pull/4363))
 - Promote some `span.data` fields to the top level. ([#4298](https://github.com/getsentry/relay/pull/4298))
 - Remove metrics summaries. ([#4278](https://github.com/getsentry/relay/pull/4278), [#4279](https://github.com/getsentry/relay/pull/4279), [#4296](https://github.com/getsentry/relay/pull/4296))
 - Use async `redis` for `projectconfig`. ([#4284](https://github.com/getsentry/relay/pull/4284))
diff --git a/py/CHANGELOG.md b/py/CHANGELOG.md
index 425e057025..260c6d280b 100644
--- a/py/CHANGELOG.md
+++ b/py/CHANGELOG.md
@@ -2,8 +2,8 @@
 
 ## Unreleased
 
-**Breaking Changes**:
-- Flatten Linux distribution fields into `os.context`([#4292](https://github.com/getsentry/relay/pull/4292))
+- **Breaking**: Flatten Linux distribution fields into `os.context`([#4292](https://github.com/getsentry/relay/pull/4292))
+- Add data categories for Uptime and Attachment Items. ([#4363](https://github.com/getsentry/relay/pull/4363), [#4374](https://github.com/getsentry/relay/pull/4374))
 
 ## 0.9.3
 
diff --git a/py/sentry_relay/consts.py b/py/sentry_relay/consts.py
index 4b7ffbe0bd..ceac094305 100644
--- a/py/sentry_relay/consts.py
+++ b/py/sentry_relay/consts.py
@@ -31,6 +31,7 @@ class DataCategory(IntEnum):
     METRIC_SECOND = 19
     REPLAY_VIDEO = 20
     UPTIME = 21
+    ATTACHMENT_ITEM = 22
     UNKNOWN = -1
     # end generated
 
diff --git a/relay-base-schema/src/data_category.rs b/relay-base-schema/src/data_category.rs
index 44616f7d84..37720d5cd9 100644
--- a/relay-base-schema/src/data_category.rs
+++ b/relay-base-schema/src/data_category.rs
@@ -90,6 +90,8 @@ pub enum DataCategory {
     ReplayVideo = 20,
     /// This is the data category for Uptime monitors.
     Uptime = 21,
+    /// Counts the number of individual attachments, as opposed to the number of bytes in an attachment.
+    AttachmentItem = 22,
     //
     // IMPORTANT: After adding a new entry to DataCategory, go to the `relay-cabi` subfolder and run
     // `make header` to regenerate the C-binding. This allows using the data category from Python.
@@ -128,6 +130,7 @@ impl DataCategory {
             "metric_second" => Self::MetricSecond,
             "replay_video" => Self::ReplayVideo,
             "uptime" => Self::Uptime,
+            "attachment_item" => Self::AttachmentItem,
             _ => Self::Unknown,
         }
     }
@@ -158,6 +161,7 @@ impl DataCategory {
             Self::MetricSecond => "metric_second",
             Self::ReplayVideo => "replay_video",
             Self::Uptime => "uptime",
+            Self::AttachmentItem => "attachment_item",
             Self::Unknown => "unknown",
         }
     }
diff --git a/relay-cabi/include/relay.h b/relay-cabi/include/relay.h
index ddc3f007f7..bdeee11e2f 100644
--- a/relay-cabi/include/relay.h
+++ b/relay-cabi/include/relay.h
@@ -135,10 +135,13 @@ enum RelayDataCategory {
    */
   RELAY_DATA_CATEGORY_REPLAY_VIDEO = 20,
   /**
-   * Uptime Monitor
-   *
+   * This is the data category for Uptime monitors.
    */
   RELAY_DATA_CATEGORY_UPTIME = 21,
+  /**
+   * Counts the number of individual attachments, as opposed to the number of bytes in an attachment.
+   */
+  RELAY_DATA_CATEGORY_ATTACHMENT_ITEM = 22,
   /**
    * Any other data category not known by this Relay.
    */
@@ -552,6 +555,15 @@ struct RelayStr relay_err_get_backtrace(void);
  */
 void relay_err_clear(void);
 
+/**
+ * Performs a glob operation on bytes.
+ *
+ * Returns `true` if the glob matches, `false` otherwise.
+ */
+bool relay_is_glob_match(const struct RelayBuf *value,
+                         const struct RelayStr *pat,
+                         GlobFlags flags);
+
 /**
  * Chunks the given text based on remarks.
  */
@@ -627,15 +639,6 @@ struct RelayStr relay_pii_selector_suggestions_from_event(const struct RelayStr
  */
 void relay_test_panic(void);
 
-/**
- * Performs a glob operation on bytes.
- *
- * Returns `true` if the glob matches, `false` otherwise.
- */
-bool relay_is_glob_match(const struct RelayBuf *value,
-                         const struct RelayStr *pat,
-                         GlobFlags flags);
-
 /**
  * Parse a sentry release structure from a string.
  */
diff --git a/relay-quotas/src/quota.rs b/relay-quotas/src/quota.rs
index c740a0ace8..50bb5a554b 100644
--- a/relay-quotas/src/quota.rs
+++ b/relay-quotas/src/quota.rs
@@ -198,7 +198,8 @@ impl CategoryUnit {
             | DataCategory::UserReportV2
             | DataCategory::ProfileChunk
             | DataCategory::Uptime
-            | DataCategory::MetricSecond => Some(Self::Count),
+            | DataCategory::MetricSecond
+            | DataCategory::AttachmentItem => Some(Self::Count),
             DataCategory::Attachment => Some(Self::Bytes),
             DataCategory::Session => Some(Self::Batched),
             DataCategory::ProfileDuration => Some(Self::Milliseconds),