diff --git a/Cargo.lock b/Cargo.lock
index dda45b84..09d2f89c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -717,7 +717,7 @@ checksum = "955d28af4278de8121b7ebeb796b6a45735dc01436d898801014aced2773a3d6"
 
 [[package]]
 name = "sentry_protos"
-version = "0.89.0"
+version = "0.90.0"
 dependencies = [
  "prost",
  "prost-types",
diff --git a/proto/sentry_protos/billing/v1/data_category.proto b/proto/sentry_protos/billing/v1/data_category.proto
index f5ab67f4..804b8c9c 100644
--- a/proto/sentry_protos/billing/v1/data_category.proto
+++ b/proto/sentry_protos/billing/v1/data_category.proto
@@ -71,6 +71,8 @@ enum DataCategory {
   DATA_CATEGORY_TRACE_METRIC_BYTE = 32;
   // Usage based seer pricing
   DATA_CATEGORY_SEER_USAGE_MICRO_CENTS = 33;
+  // Seer credits consumed by billable Seer features.
+  DATA_CATEGORY_BILLABLE_SEER_CREDITS = 34;
   // Any other data category not known by this version.
   DATA_CATEGORY_UNKNOWN = -1;
 }
diff --git a/proto/sentry_protos/billing/v1/services/seer_feature_billing/v1/endpoint_get_is_free_seer_feature.proto b/proto/sentry_protos/billing/v1/services/seer_feature_billing/v1/endpoint_get_is_free_seer_feature.proto
new file mode 100644
index 00000000..f6696a00
--- /dev/null
+++ b/proto/sentry_protos/billing/v1/services/seer_feature_billing/v1/endpoint_get_is_free_seer_feature.proto
@@ -0,0 +1,13 @@
+syntax = "proto3";
+
+package sentry_protos.billing.v1.services.seer_feature_billing.v1;
+
+message GetIsFreeSeerFeatureRequest {
+  // A Seer feature string, as recorded in LLM proxy cost data.
+  string feature_id = 1;
+}
+
+message GetIsFreeSeerFeatureResponse {
+  // True when usage of the feature is never billed for any organization.
+  bool is_free = 1;
+}
diff --git a/proto/sentry_protos/billing/v1/services/seer_feature_billing/v1/endpoint_get_mapping.proto b/proto/sentry_protos/billing/v1/services/seer_feature_billing/v1/endpoint_get_mapping.proto
new file mode 100644
index 00000000..3ffb90a9
--- /dev/null
+++ b/proto/sentry_protos/billing/v1/services/seer_feature_billing/v1/endpoint_get_mapping.proto
@@ -0,0 +1,14 @@
+syntax = "proto3";
+
+package sentry_protos.billing.v1.services.seer_feature_billing.v1;
+
+import "sentry_protos/billing/v1/data_category.proto";
+
+message GetMappingRequest {}
+
+message GetMappingResponse {
+  // Maps a Seer feature string, as recorded in LLM proxy cost data, to the
+  // data category its usage is billed under. Features absent from the map
+  // have no billing data category.
+  map<string, sentry_protos.billing.v1.DataCategory> data_category_by_feature = 1;
+}
diff --git a/rust/src/_include.rs b/rust/src/_include.rs
index 42f73155..bfed6562 100644
--- a/rust/src/_include.rs
+++ b/rust/src/_include.rs
@@ -120,6 +120,11 @@ pub mod sentry_protos {
                         include!("sentry_protos.billing.v1.services.seats.v1.rs");
                     }
                 }
+                pub mod seer_feature_billing {
+                    pub mod v1 {
+                        include!("sentry_protos.billing.v1.services.seer_feature_billing.v1.rs");
+                    }
+                }
                 pub mod trial {
                     pub mod v1 {
                         include!("sentry_protos.billing.v1.services.trial.v1.rs");
diff --git a/rust/src/sentry_protos.billing.v1.rs b/rust/src/sentry_protos.billing.v1.rs
index 09aa0254..75909290 100644
--- a/rust/src/sentry_protos.billing.v1.rs
+++ b/rust/src/sentry_protos.billing.v1.rs
@@ -70,6 +70,8 @@ pub enum DataCategory {
     TraceMetricByte = 32,
     /// Usage based seer pricing
     SeerUsageMicroCents = 33,
+    /// Seer credits consumed by billable Seer features.
+    BillableSeerCredits = 34,
     /// Any other data category not known by this version.
     Unknown = -1,
 }
@@ -112,6 +114,7 @@ impl DataCategory {
             Self::ProfileUi => "DATA_CATEGORY_PROFILE_UI",
             Self::TraceMetricByte => "DATA_CATEGORY_TRACE_METRIC_BYTE",
             Self::SeerUsageMicroCents => "DATA_CATEGORY_SEER_USAGE_MICRO_CENTS",
+            Self::BillableSeerCredits => "DATA_CATEGORY_BILLABLE_SEER_CREDITS",
             Self::Unknown => "DATA_CATEGORY_UNKNOWN",
         }
     }
@@ -150,6 +153,7 @@ impl DataCategory {
             "DATA_CATEGORY_PROFILE_UI" => Some(Self::ProfileUi),
             "DATA_CATEGORY_TRACE_METRIC_BYTE" => Some(Self::TraceMetricByte),
             "DATA_CATEGORY_SEER_USAGE_MICRO_CENTS" => Some(Self::SeerUsageMicroCents),
+            "DATA_CATEGORY_BILLABLE_SEER_CREDITS" => Some(Self::BillableSeerCredits),
             "DATA_CATEGORY_UNKNOWN" => Some(Self::Unknown),
             _ => None,
         }
diff --git a/rust/src/sentry_protos.billing.v1.services.seer_feature_billing.v1.rs b/rust/src/sentry_protos.billing.v1.services.seer_feature_billing.v1.rs
new file mode 100644
index 00000000..e2959ea0
--- /dev/null
+++ b/rust/src/sentry_protos.billing.v1.services.seer_feature_billing.v1.rs
@@ -0,0 +1,26 @@
+// This file is @generated by prost-build.
+#[derive(Clone, PartialEq, Eq, Hash, ::prost::Message)]
+pub struct GetIsFreeSeerFeatureRequest {
+    /// A Seer feature string, as recorded in LLM proxy cost data.
+    #[prost(string, tag = "1")]
+    pub feature_id: ::prost::alloc::string::String,
+}
+#[derive(Clone, Copy, PartialEq, Eq, Hash, ::prost::Message)]
+pub struct GetIsFreeSeerFeatureResponse {
+    /// True when usage of the feature is never billed for any organization.
+    #[prost(bool, tag = "1")]
+    pub is_free: bool,
+}
+#[derive(Clone, Copy, PartialEq, Eq, Hash, ::prost::Message)]
+pub struct GetMappingRequest {}
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct GetMappingResponse {
+    /// Maps a Seer feature string, as recorded in LLM proxy cost data, to the
+    /// data category its usage is billed under. Features absent from the map
+    /// have no billing data category.
+    #[prost(map = "string, enumeration(super::super::super::DataCategory)", tag = "1")]
+    pub data_category_by_feature: ::std::collections::HashMap<
+        ::prost::alloc::string::String,
+        i32,
+    >,
+}