diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 57551ac..b2e01fc 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -5,7 +5,7 @@
   </component>
   <component name="ChangeListManager">
     <list default="true" id="0c02c158-5d61-480a-aace-68bdde6b6b64" name="Changes" comment="">
-      <change beforePath="$PROJECT_DIR$/chart/values.yaml" beforeDir="false" afterPath="$PROJECT_DIR$/chart/values.yaml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -16,13 +16,13 @@
   <component name="Git.Settings">
     <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$" />
   </component>
-  <component name="KubernetesApiPersistence"><![CDATA[{}]]></component>
-  <component name="KubernetesApiProvider"><![CDATA[{
-  "isMigrated": true
-}]]></component>
-  <component name="ProjectColorInfo"><![CDATA[{
-  "associatedIndex": 0
-}]]></component>
+  <component name="KubernetesApiPersistence">{}</component>
+  <component name="KubernetesApiProvider">{
+  &quot;isMigrated&quot;: true
+}</component>
+  <component name="ProjectColorInfo">{
+  &quot;associatedIndex&quot;: 0
+}</component>
   <component name="ProjectId" id="37nW9tcrz916nAl4Z7hdb6SkirQ" />
   <component name="ProjectViewState">
     <option name="hideEmptyMiddlePackages" value="true" />
@@ -36,7 +36,7 @@
     "RunOnceActivity.go.formatter.settings.were.checked": "true",
     "RunOnceActivity.go.migrated.go.modules.settings": "true",
     "RunOnceActivity.go.modules.go.list.on.any.changes.was.set": "true",
-    "git-widget-placeholder": "fix-helm-chart",
+    "git-widget-placeholder": "add-telemetry",
     "go.import.settings.migrated": "true",
     "go.sdk.automatically.set": "true",
     "last_opened_file_path": "/Users/kevingruber/Developer/theses/theia-shared-cache",
diff --git a/chart/Chart.yaml b/chart/Chart.yaml
index 663d302..17a407a 100644
--- a/chart/Chart.yaml
+++ b/chart/Chart.yaml
@@ -5,7 +5,7 @@ description: A Gradle Build Cache server with MinIO backend for Theia IDE deploy
 type: application
 
 # Chart version - bump for breaking changes
-version: 0.2.0
+version: 0.2.1
 
 # Application version - matches the cache server version
 appVersion: "0.1.0"
diff --git a/src/cmd/server/main.go b/src/cmd/server/main.go
index 4e0268d..4e7156c 100644
--- a/src/cmd/server/main.go
+++ b/src/cmd/server/main.go
@@ -3,6 +3,7 @@ package main
 import (
 	"context"
 	"flag"
+	"github.com/kevingruber/gradle-cache/internal/telemetry"
 	"os"
 	"os/signal"
 	"syscall"
@@ -32,6 +33,12 @@ func main() {
 		logger.Fatal().Err(err).Msg("invalid configuration")
 	}
 
+	cleanup, err := telemetry.SetupTelemetry(cfg.Sentry.Enabled, cfg.Sentry.Dsn)
+	if err != nil {
+		logger.Fatal().Err(err).Msg("failed to setup telemetry")
+	}
+	defer cleanup()
+
 	// Create storage
 	store, err := storage.NewMinIOStorage(storage.MinIOConfig{
 		Endpoint:  cfg.Storage.Endpoint,
diff --git a/src/go.mod b/src/go.mod
index 99e11cc..76a454f 100644
--- a/src/go.mod
+++ b/src/go.mod
@@ -8,25 +8,32 @@ require (
 	github.com/prometheus/client_golang v1.23.2
 	github.com/rs/zerolog v1.34.0
 	github.com/spf13/viper v1.21.0
+	go.opentelemetry.io/otel v1.40.0
+	go.opentelemetry.io/otel/exporters/prometheus v0.62.0
 )
 
 require (
 	github.com/beorn7/perks v1.0.1 // indirect
-	github.com/bytedance/sonic v1.14.0 // indirect
-	github.com/bytedance/sonic/loader v0.3.0 // indirect
+	github.com/bytedance/gopkg v0.1.3 // indirect
+	github.com/bytedance/sonic v1.15.0 // indirect
+	github.com/bytedance/sonic/loader v0.5.0 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/cloudwego/base64x v0.1.6 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/fsnotify/fsnotify v1.9.0 // indirect
-	github.com/gabriel-vasile/mimetype v1.4.8 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.13 // indirect
+	github.com/getsentry/sentry-go v0.42.0 // indirect
+	github.com/getsentry/sentry-go/otel v0.42.0 // indirect
 	github.com/gin-contrib/sse v1.1.0 // indirect
 	github.com/go-ini/ini v1.67.0 // indirect
+	github.com/go-logr/logr v1.4.3 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/go-playground/locales v0.14.1 // indirect
 	github.com/go-playground/universal-translator v0.18.1 // indirect
-	github.com/go-playground/validator/v10 v10.27.0 // indirect
+	github.com/go-playground/validator/v10 v10.30.1 // indirect
 	github.com/go-viper/mapstructure/v2 v2.4.0 // indirect
-	github.com/goccy/go-json v0.10.2 // indirect
-	github.com/goccy/go-yaml v1.18.0 // indirect
+	github.com/goccy/go-json v0.10.5 // indirect
+	github.com/goccy/go-yaml v1.19.2 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/klauspost/compress v1.18.0 // indirect
@@ -43,10 +50,11 @@ require (
 	github.com/pelletier/go-toml/v2 v2.2.4 // indirect
 	github.com/philhofer/fwd v1.2.0 // indirect
 	github.com/prometheus/client_model v0.6.2 // indirect
-	github.com/prometheus/common v0.66.1 // indirect
-	github.com/prometheus/procfs v0.16.1 // indirect
-	github.com/quic-go/qpack v0.5.1 // indirect
-	github.com/quic-go/quic-go v0.54.0 // indirect
+	github.com/prometheus/common v0.67.5 // indirect
+	github.com/prometheus/otlptranslator v1.0.0 // indirect
+	github.com/prometheus/procfs v0.19.2 // indirect
+	github.com/quic-go/qpack v0.6.0 // indirect
+	github.com/quic-go/quic-go v0.59.0 // indirect
 	github.com/rs/xid v1.6.0 // indirect
 	github.com/sagikazarmark/locafero v0.11.0 // indirect
 	github.com/sourcegraph/conc v0.3.1-0.20240121214520-5f936abd7ae8 // indirect
@@ -56,18 +64,20 @@ require (
 	github.com/subosito/gotenv v1.6.0 // indirect
 	github.com/tinylib/msgp v1.3.0 // indirect
 	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
-	github.com/ugorji/go/codec v1.3.0 // indirect
-	go.uber.org/mock v0.5.0 // indirect
-	go.yaml.in/yaml/v2 v2.4.2 // indirect
+	github.com/ugorji/go/codec v1.3.1 // indirect
+	go.opentelemetry.io/auto/sdk v1.2.1 // indirect
+	go.opentelemetry.io/otel/metric v1.40.0 // indirect
+	go.opentelemetry.io/otel/sdk v1.40.0 // indirect
+	go.opentelemetry.io/otel/sdk/metric v1.40.0 // indirect
+	go.opentelemetry.io/otel/trace v1.40.0 // indirect
+	go.uber.org/mock v0.6.0 // indirect
+	go.yaml.in/yaml/v2 v2.4.3 // indirect
 	go.yaml.in/yaml/v3 v3.0.4 // indirect
-	golang.org/x/arch v0.20.0 // indirect
-	golang.org/x/crypto v0.41.0 // indirect
-	golang.org/x/mod v0.26.0 // indirect
-	golang.org/x/net v0.43.0 // indirect
-	golang.org/x/sync v0.16.0 // indirect
-	golang.org/x/sys v0.35.0 // indirect
-	golang.org/x/text v0.28.0 // indirect
-	golang.org/x/tools v0.35.0 // indirect
-	google.golang.org/protobuf v1.36.9 // indirect
+	golang.org/x/arch v0.23.0 // indirect
+	golang.org/x/crypto v0.47.0 // indirect
+	golang.org/x/net v0.49.0 // indirect
+	golang.org/x/sys v0.40.0 // indirect
+	golang.org/x/text v0.33.0 // indirect
+	google.golang.org/protobuf v1.36.11 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
diff --git a/src/go.sum b/src/go.sum
index 3a9a93f..fae148c 100644
--- a/src/go.sum
+++ b/src/go.sum
@@ -1,9 +1,11 @@
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
-github.com/bytedance/sonic v1.14.0 h1:/OfKt8HFw0kh2rj8N0F6C/qPGRESq0BbaNZgcNXXzQQ=
-github.com/bytedance/sonic v1.14.0/go.mod h1:WoEbx8WTcFJfzCe0hbmyTGrfjt8PzNEBdxlNUO24NhA=
-github.com/bytedance/sonic/loader v0.3.0 h1:dskwH8edlzNMctoruo8FPTJDF3vLtDT0sXZwvZJyqeA=
-github.com/bytedance/sonic/loader v0.3.0/go.mod h1:N8A3vUdtUebEY2/VQC0MyhYeKUFosQU6FxH2JmUe6VI=
+github.com/bytedance/gopkg v0.1.3 h1:TPBSwH8RsouGCBcMBktLt1AymVo2TVsBVCY4b6TnZ/M=
+github.com/bytedance/gopkg v0.1.3/go.mod h1:576VvJ+eJgyCzdjS+c4+77QF3p7ubbtiKARP3TxducM=
+github.com/bytedance/sonic v1.15.0 h1:/PXeWFaR5ElNcVE84U0dOHjiMHQOwNIx3K4ymzh/uSE=
+github.com/bytedance/sonic v1.15.0/go.mod h1:tFkWrPz0/CUCLEF4ri4UkHekCIcdnkqXw9VduqpJh0k=
+github.com/bytedance/sonic/loader v0.5.0 h1:gXH3KVnatgY7loH5/TkeVyXPfESoqSBSBEiDd5VjlgE=
+github.com/bytedance/sonic/loader v0.5.0/go.mod h1:AR4NYCk5DdzZizZ5djGqQ92eEhCCcdf5x77udYiSJRo=
 github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
 github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/cloudwego/base64x v0.1.6 h1:t11wG9AECkCDk5fMSoxmufanudBtJ+/HemLstXDLI2M=
@@ -18,28 +20,37 @@ github.com/frankban/quicktest v1.14.6 h1:7Xjx+VpznH+oBnejlPUj8oUpdxnVs4f8XU8WnHk
 github.com/frankban/quicktest v1.14.6/go.mod h1:4ptaffx2x8+WTWXmUCuVU6aPUX1/Mz7zb5vbUoiM6w0=
 github.com/fsnotify/fsnotify v1.9.0 h1:2Ml+OJNzbYCTzsxtv8vKSFD9PbJjmhYF14k/jKC7S9k=
 github.com/fsnotify/fsnotify v1.9.0/go.mod h1:8jBTzvmWwFyi3Pb8djgCCO5IBqzKJ/Jwo8TRcHyHii0=
-github.com/gabriel-vasile/mimetype v1.4.8 h1:FfZ3gj38NjllZIeJAmMhr+qKL8Wu+nOoI3GqacKw1NM=
-github.com/gabriel-vasile/mimetype v1.4.8/go.mod h1:ByKUIKGjh1ODkGM1asKUbQZOLGrPjydw3hYPU2YU9t8=
+github.com/gabriel-vasile/mimetype v1.4.13 h1:46nXokslUBsAJE/wMsp5gtO500a4F3Nkz9Ufpk2AcUM=
+github.com/gabriel-vasile/mimetype v1.4.13/go.mod h1:d+9Oxyo1wTzWdyVUPMmXFvp4F9tea18J8ufA774AB3s=
+github.com/getsentry/sentry-go v0.42.0 h1:eeFMACuZTbUQf90RE8dE4tXeSe4CZyfvR1MBL7RLEt8=
+github.com/getsentry/sentry-go v0.42.0/go.mod h1:eRXCoh3uvmjQLY6qu63BjUZnaBu5L5WhMV1RwYO8W5s=
+github.com/getsentry/sentry-go/otel v0.42.0 h1:dXVg9jRp90XH73rv5Fk43FkQ5KGHWvsi2ZH1q9l6vPY=
+github.com/getsentry/sentry-go/otel v0.42.0/go.mod h1:CE9SkBBU4joi2b/GmRTaVKt1TfGIowE1UmZOVOVrlW0=
 github.com/gin-contrib/sse v1.1.0 h1:n0w2GMuUpWDVp7qSpvze6fAu9iRxJY4Hmj6AmBOU05w=
 github.com/gin-contrib/sse v1.1.0/go.mod h1:hxRZ5gVpWMT7Z0B0gSNYqqsSCNIJMjzvm6fqCz9vjwM=
 github.com/gin-gonic/gin v1.11.0 h1:OW/6PLjyusp2PPXtyxKHU0RbX6I/l28FTdDlae5ueWk=
 github.com/gin-gonic/gin v1.11.0/go.mod h1:+iq/FyxlGzII0KHiBGjuNn4UNENUlKbGlNmc+W50Dls=
 github.com/go-ini/ini v1.67.0 h1:z6ZrTEZqSWOTyH2FlglNbNgARyHG8oLW9gMELqKr06A=
 github.com/go-ini/ini v1.67.0/go.mod h1:ByCAeIL28uOIIG0E3PJtZPDL8WnHpFKFOtgjp+3Ies8=
+github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
+github.com/go-logr/logr v1.4.3 h1:CjnDlHq8ikf6E492q6eKboGOC0T8CDaOvkHCIg8idEI=
+github.com/go-logr/logr v1.4.3/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
+github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
+github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
 github.com/go-playground/assert/v2 v2.2.0 h1:JvknZsQTYeFEAhQwI4qEt9cyV5ONwRHC+lYKSsYSR8s=
 github.com/go-playground/assert/v2 v2.2.0/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4=
 github.com/go-playground/locales v0.14.1 h1:EWaQ/wswjilfKLTECiXz7Rh+3BjFhfDFKv/oXslEjJA=
 github.com/go-playground/locales v0.14.1/go.mod h1:hxrqLVvrK65+Rwrd5Fc6F2O76J/NuW9t0sjnWqG1slY=
 github.com/go-playground/universal-translator v0.18.1 h1:Bcnm0ZwsGyWbCzImXv+pAJnYK9S473LQFuzCbDbfSFY=
 github.com/go-playground/universal-translator v0.18.1/go.mod h1:xekY+UJKNuX9WP91TpwSH2VMlDf28Uj24BCp08ZFTUY=
-github.com/go-playground/validator/v10 v10.27.0 h1:w8+XrWVMhGkxOaaowyKH35gFydVHOvC0/uWoy2Fzwn4=
-github.com/go-playground/validator/v10 v10.27.0/go.mod h1:I5QpIEbmr8On7W0TktmJAumgzX4CA1XNl4ZmDuVHKKo=
+github.com/go-playground/validator/v10 v10.30.1 h1:f3zDSN/zOma+w6+1Wswgd9fLkdwy06ntQJp0BBvFG0w=
+github.com/go-playground/validator/v10 v10.30.1/go.mod h1:oSuBIQzuJxL//3MelwSLD5hc2Tu889bF0Idm9Dg26cM=
 github.com/go-viper/mapstructure/v2 v2.4.0 h1:EBsztssimR/CONLSZZ04E8qAkxNYq4Qp9LvH92wZUgs=
 github.com/go-viper/mapstructure/v2 v2.4.0/go.mod h1:oJDH3BJKyqBA2TXFhDsKDGDTlndYOZ6rGS0BRZIxGhM=
-github.com/goccy/go-json v0.10.2 h1:CrxCmQqYDkv1z7lO7Wbh2HN93uovUHgrECaO5ZrCXAU=
-github.com/goccy/go-json v0.10.2/go.mod h1:6MelG93GURQebXPDq3khkgXZkazVtN9CRI+MGFi0w8I=
-github.com/goccy/go-yaml v1.18.0 h1:8W7wMFS12Pcas7KU+VVkaiCng+kG8QiFeFwzFb+rwuw=
-github.com/goccy/go-yaml v1.18.0/go.mod h1:XBurs7gK8ATbW4ZPGKgcbrY1Br56PdM69F7LkFRi1kA=
+github.com/goccy/go-json v0.10.5 h1:Fq85nIqj+gXn/S5ahsiTlK3TmC85qgirsdTP/+DeaC4=
+github.com/goccy/go-json v0.10.5/go.mod h1:oq7eo15ShAhp70Anwd5lgX2pLfOS3QCiwU/PULtXL6M=
+github.com/goccy/go-yaml v1.19.2 h1:PmFC1S6h8ljIz6gMRBopkjP1TVT7xuwrButHID66PoM=
+github.com/goccy/go-yaml v1.19.2/go.mod h1:XBurs7gK8ATbW4ZPGKgcbrY1Br56PdM69F7LkFRi1kA=
 github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
 github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
 github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
@@ -93,16 +104,18 @@ github.com/prometheus/client_golang v1.23.2 h1:Je96obch5RDVy3FDMndoUsjAhG5Edi49h
 github.com/prometheus/client_golang v1.23.2/go.mod h1:Tb1a6LWHB3/SPIzCoaDXI4I8UHKeFTEQ1YCr+0Gyqmg=
 github.com/prometheus/client_model v0.6.2 h1:oBsgwpGs7iVziMvrGhE53c/GrLUsZdHnqNwqPLxwZyk=
 github.com/prometheus/client_model v0.6.2/go.mod h1:y3m2F6Gdpfy6Ut/GBsUqTWZqCUvMVzSfMLjcu6wAwpE=
-github.com/prometheus/common v0.66.1 h1:h5E0h5/Y8niHc5DlaLlWLArTQI7tMrsfQjHV+d9ZoGs=
-github.com/prometheus/common v0.66.1/go.mod h1:gcaUsgf3KfRSwHY4dIMXLPV0K/Wg1oZ8+SbZk/HH/dA=
-github.com/prometheus/procfs v0.16.1 h1:hZ15bTNuirocR6u0JZ6BAHHmwS1p8B4P6MRqxtzMyRg=
-github.com/prometheus/procfs v0.16.1/go.mod h1:teAbpZRB1iIAJYREa1LsoWUXykVXA1KlTmWl8x/U+Is=
-github.com/quic-go/qpack v0.5.1 h1:giqksBPnT/HDtZ6VhtFKgoLOWmlyo9Ei6u9PqzIMbhI=
-github.com/quic-go/qpack v0.5.1/go.mod h1:+PC4XFrEskIVkcLzpEkbLqq1uCoxPhQuvK5rH1ZgaEg=
-github.com/quic-go/quic-go v0.54.0 h1:6s1YB9QotYI6Ospeiguknbp2Znb/jZYjZLRXn9kMQBg=
-github.com/quic-go/quic-go v0.54.0/go.mod h1:e68ZEaCdyviluZmy44P6Iey98v/Wfz6HCjQEm+l8zTY=
-github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ=
-github.com/rogpeppe/go-internal v1.10.0/go.mod h1:UQnix2H7Ngw/k4C5ijL5+65zddjncjaFoBhdsK/akog=
+github.com/prometheus/common v0.67.5 h1:pIgK94WWlQt1WLwAC5j2ynLaBRDiinoAb86HZHTUGI4=
+github.com/prometheus/common v0.67.5/go.mod h1:SjE/0MzDEEAyrdr5Gqc6G+sXI67maCxzaT3A2+HqjUw=
+github.com/prometheus/otlptranslator v1.0.0 h1:s0LJW/iN9dkIH+EnhiD3BlkkP5QVIUVEoIwkU+A6qos=
+github.com/prometheus/otlptranslator v1.0.0/go.mod h1:vRYWnXvI6aWGpsdY/mOT/cbeVRBlPWtBNDb7kGR3uKM=
+github.com/prometheus/procfs v0.19.2 h1:zUMhqEW66Ex7OXIiDkll3tl9a1ZdilUOd/F6ZXw4Vws=
+github.com/prometheus/procfs v0.19.2/go.mod h1:M0aotyiemPhBCM0z5w87kL22CxfcH05ZpYlu+b4J7mw=
+github.com/quic-go/qpack v0.6.0 h1:g7W+BMYynC1LbYLSqRt8PBg5Tgwxn214ZZR34VIOjz8=
+github.com/quic-go/qpack v0.6.0/go.mod h1:lUpLKChi8njB4ty2bFLX2x4gzDqXwUpaO1DP9qMDZII=
+github.com/quic-go/quic-go v0.59.0 h1:OLJkp1Mlm/aS7dpKgTc6cnpynnD2Xg7C1pwL6vy/SAw=
+github.com/quic-go/quic-go v0.59.0/go.mod h1:upnsH4Ju1YkqpLXC305eW3yDZ4NfnNbmQRCMWS58IKU=
+github.com/rogpeppe/go-internal v1.14.1 h1:UQB4HGPB6osV0SQTLymcB4TgvyWu6ZyliaW0tI/otEQ=
+github.com/rogpeppe/go-internal v1.14.1/go.mod h1:MaRKkUm5W0goXpeCfT7UZI6fk/L7L7so1lCWt35ZSgc=
 github.com/rs/xid v1.6.0 h1:fV591PaemRlL6JfRxGDEPl69wICngIQ3shQtzfy2gxU=
 github.com/rs/xid v1.6.0/go.mod h1:7XoLgs4eV+QndskICGsho+ADou8ySMSjJKDIan90Nz0=
 github.com/rs/zerolog v1.34.0 h1:k43nTLIwcTVQAncfCw4KZ2VY6ukYoZaBPNOE8txlOeY=
@@ -122,10 +135,12 @@ github.com/spf13/viper v1.21.0/go.mod h1:P0lhsswPGWD/1lZJ9ny3fYnVqxiegrlNrEmgLjb
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
 github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
+github.com/stretchr/objx v0.5.2/go.mod h1:FRsXN1f5AsAjCGJKqEizvkpNtU+EGNCLh3NxZ/8L+MA=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
-github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
+github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
 github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
 github.com/subosito/gotenv v1.6.0 h1:9NlTDc1FTs4qu0DDq7AEtTPNw6SVm7uBMsUCUjABIf8=
@@ -134,37 +149,45 @@ github.com/tinylib/msgp v1.3.0 h1:ULuf7GPooDaIlbyvgAxBV/FI7ynli6LZ1/nVUNu+0ww=
 github.com/tinylib/msgp v1.3.0/go.mod h1:ykjzy2wzgrlvpDCRc4LA8UXy6D8bzMSuAF3WD57Gok0=
 github.com/twitchyliquid64/golang-asm v0.15.1 h1:SU5vSMR7hnwNxj24w34ZyCi/FmDZTkS4MhqMhdFk5YI=
 github.com/twitchyliquid64/golang-asm v0.15.1/go.mod h1:a1lVb/DtPvCB8fslRZhAngC2+aY1QWCk3Cedj/Gdt08=
-github.com/ugorji/go/codec v1.3.0 h1:Qd2W2sQawAfG8XSvzwhBeoGq71zXOC/Q1E9y/wUcsUA=
-github.com/ugorji/go/codec v1.3.0/go.mod h1:pRBVtBSKl77K30Bv8R2P+cLSGaTtex6fsA2Wjqmfxj4=
+github.com/ugorji/go/codec v1.3.1 h1:waO7eEiFDwidsBN6agj1vJQ4AG7lh2yqXyOXqhgQuyY=
+github.com/ugorji/go/codec v1.3.1/go.mod h1:pRBVtBSKl77K30Bv8R2P+cLSGaTtex6fsA2Wjqmfxj4=
+go.opentelemetry.io/auto/sdk v1.2.1 h1:jXsnJ4Lmnqd11kwkBV2LgLoFMZKizbCi5fNZ/ipaZ64=
+go.opentelemetry.io/auto/sdk v1.2.1/go.mod h1:KRTj+aOaElaLi+wW1kO/DZRXwkF4C5xPbEe3ZiIhN7Y=
+go.opentelemetry.io/otel v1.40.0 h1:oA5YeOcpRTXq6NN7frwmwFR0Cn3RhTVZvXsP4duvCms=
+go.opentelemetry.io/otel v1.40.0/go.mod h1:IMb+uXZUKkMXdPddhwAHm6UfOwJyh4ct1ybIlV14J0g=
+go.opentelemetry.io/otel/exporters/prometheus v0.62.0 h1:krvC4JMfIOVdEuNPTtQ0ZjCiXrybhv+uOHMfHRmnvVo=
+go.opentelemetry.io/otel/exporters/prometheus v0.62.0/go.mod h1:fgOE6FM/swEnsVQCqCnbOfRV4tOnWPg7bVeo4izBuhQ=
+go.opentelemetry.io/otel/metric v1.40.0 h1:rcZe317KPftE2rstWIBitCdVp89A2HqjkxR3c11+p9g=
+go.opentelemetry.io/otel/metric v1.40.0/go.mod h1:ib/crwQH7N3r5kfiBZQbwrTge743UDc7DTFVZrrXnqc=
+go.opentelemetry.io/otel/sdk v1.40.0 h1:KHW/jUzgo6wsPh9At46+h4upjtccTmuZCFAc9OJ71f8=
+go.opentelemetry.io/otel/sdk v1.40.0/go.mod h1:Ph7EFdYvxq72Y8Li9q8KebuYUr2KoeyHx0DRMKrYBUE=
+go.opentelemetry.io/otel/sdk/metric v1.40.0 h1:mtmdVqgQkeRxHgRv4qhyJduP3fYJRMX4AtAlbuWdCYw=
+go.opentelemetry.io/otel/sdk/metric v1.40.0/go.mod h1:4Z2bGMf0KSK3uRjlczMOeMhKU2rhUqdWNoKcYrtcBPg=
+go.opentelemetry.io/otel/trace v1.40.0 h1:WA4etStDttCSYuhwvEa8OP8I5EWu24lkOzp+ZYblVjw=
+go.opentelemetry.io/otel/trace v1.40.0/go.mod h1:zeAhriXecNGP/s2SEG3+Y8X9ujcJOTqQ5RgdEJcawiA=
 go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
 go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
-go.uber.org/mock v0.5.0 h1:KAMbZvZPyBPWgD14IrIQ38QCyjwpvVVV6K/bHl1IwQU=
-go.uber.org/mock v0.5.0/go.mod h1:ge71pBPLYDk7QIi1LupWxdAykm7KIEFchiOqd6z7qMM=
-go.yaml.in/yaml/v2 v2.4.2 h1:DzmwEr2rDGHl7lsFgAHxmNz/1NlQ7xLIrlN2h5d1eGI=
-go.yaml.in/yaml/v2 v2.4.2/go.mod h1:081UH+NErpNdqlCXm3TtEran0rJZGxAYx9hb/ELlsPU=
+go.uber.org/mock v0.6.0 h1:hyF9dfmbgIX5EfOdasqLsWD6xqpNZlXblLB/Dbnwv3Y=
+go.uber.org/mock v0.6.0/go.mod h1:KiVJ4BqZJaMj4svdfmHM0AUx4NJYO8ZNpPnZn1Z+BBU=
+go.yaml.in/yaml/v2 v2.4.3 h1:6gvOSjQoTB3vt1l+CU+tSyi/HOjfOjRLJ4YwYZGwRO0=
+go.yaml.in/yaml/v2 v2.4.3/go.mod h1:zSxWcmIDjOzPXpjlTTbAsKokqkDNAVtZO0WOMiT90s8=
 go.yaml.in/yaml/v3 v3.0.4 h1:tfq32ie2Jv2UxXFdLJdh3jXuOzWiL1fo0bu/FbuKpbc=
 go.yaml.in/yaml/v3 v3.0.4/go.mod h1:DhzuOOF2ATzADvBadXxruRBLzYTpT36CKvDb3+aBEFg=
-golang.org/x/arch v0.20.0 h1:dx1zTU0MAE98U+TQ8BLl7XsJbgze2WnNKF/8tGp/Q6c=
-golang.org/x/arch v0.20.0/go.mod h1:bdwinDaKcfZUGpH09BB7ZmOfhalA8lQdzl62l8gGWsk=
-golang.org/x/crypto v0.41.0 h1:WKYxWedPGCTVVl5+WHSSrOBT0O8lx32+zxmHxijgXp4=
-golang.org/x/crypto v0.41.0/go.mod h1:pO5AFd7FA68rFak7rOAGVuygIISepHftHnr8dr6+sUc=
-golang.org/x/mod v0.26.0 h1:EGMPT//Ezu+ylkCijjPc+f4Aih7sZvaAr+O3EHBxvZg=
-golang.org/x/mod v0.26.0/go.mod h1:/j6NAhSk8iQ723BGAUyoAcn7SlD7s15Dp9Nd/SfeaFQ=
-golang.org/x/net v0.43.0 h1:lat02VYK2j4aLzMzecihNvTlJNQUq316m2Mr9rnM6YE=
-golang.org/x/net v0.43.0/go.mod h1:vhO1fvI4dGsIjh73sWfUVjj3N7CA9WkKJNQm2svM6Jg=
-golang.org/x/sync v0.16.0 h1:ycBJEhp9p4vXvUZNszeOq0kGTPghopOL8q0fq3vstxw=
-golang.org/x/sync v0.16.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA=
+golang.org/x/arch v0.23.0 h1:lKF64A2jF6Zd8L0knGltUnegD62JMFBiCPBmQpToHhg=
+golang.org/x/arch v0.23.0/go.mod h1:dNHoOeKiyja7GTvF9NJS1l3Z2yntpQNzgrjh1cU103A=
+golang.org/x/crypto v0.47.0 h1:V6e3FRj+n4dbpw86FJ8Fv7XVOql7TEwpHapKoMJ/GO8=
+golang.org/x/crypto v0.47.0/go.mod h1:ff3Y9VzzKbwSSEzWqJsJVBnWmRwRSHt/6Op5n9bQc4A=
+golang.org/x/net v0.49.0 h1:eeHFmOGUTtaaPSGNmjBKpbng9MulQsJURQUAfUwY++o=
+golang.org/x/net v0.49.0/go.mod h1:/ysNB2EvaqvesRkuLAyjI1ycPZlQHM3q01F02UY/MV8=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.35.0 h1:vz1N37gP5bs89s7He8XuIYXpyY0+QlsKmzipCbUtyxI=
-golang.org/x/sys v0.35.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
-golang.org/x/text v0.28.0 h1:rhazDwis8INMIwQ4tpjLDzUhx6RlXqZNPEM0huQojng=
-golang.org/x/text v0.28.0/go.mod h1:U8nCwOR8jO/marOQ0QbDiOngZVEBB7MAiitBuMjXiNU=
-golang.org/x/tools v0.35.0 h1:mBffYraMEf7aa0sB+NuKnuCy8qI/9Bughn8dC2Gu5r0=
-golang.org/x/tools v0.35.0/go.mod h1:NKdj5HkL/73byiZSJjqJgKn3ep7KjFkBOkR/Hps3VPw=
-google.golang.org/protobuf v1.36.9 h1:w2gp2mA27hUeUzj9Ex9FBjsBm40zfaDtEWow293U7Iw=
-google.golang.org/protobuf v1.36.9/go.mod h1:fuxRtAxBytpl4zzqUh6/eyUujkJdNiuEkXntxiD/uRU=
+golang.org/x/sys v0.40.0 h1:DBZZqJ2Rkml6QMQsZywtnjnnGvHza6BTfYFWY9kjEWQ=
+golang.org/x/sys v0.40.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+golang.org/x/text v0.33.0 h1:B3njUFyqtHDUI5jMn1YIr5B0IE2U0qck04r6d4KPAxE=
+golang.org/x/text v0.33.0/go.mod h1:LuMebE6+rBincTi9+xWTY8TztLzKHc/9C1uBCG27+q8=
+google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
+google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
diff --git a/src/internal/config/config.go b/src/internal/config/config.go
index 7d97a2d..cd4128c 100644
--- a/src/internal/config/config.go
+++ b/src/internal/config/config.go
@@ -15,6 +15,7 @@ type Config struct {
 	Auth    AuthConfig    `mapstructure:"auth"`
 	Metrics MetricsConfig `mapstructure:"metrics"`
 	Logging LoggingConfig `mapstructure:"logging"`
+	Sentry  SentryConfig  `mapstructure:"sentry"`
 }
 
 type ServerConfig struct {
@@ -61,6 +62,11 @@ type LoggingConfig struct {
 	Format string `mapstructure:"format"`
 }
 
+type SentryConfig struct {
+	Dsn     string `mapstructure:"dsn"`
+	Enabled bool   `mapstructure:"enabled"`
+}
+
 func Load(configPath string) (*Config, error) {
 	v := viper.New()
 
@@ -82,6 +88,8 @@ func Load(configPath string) (*Config, error) {
 
 	v.SetDefault("metrics.enabled", true)
 
+	v.SetDefault("sentry.enabled", false)
+
 	v.SetDefault("logging.level", "info")
 	v.SetDefault("logging.format", "json")
 
@@ -101,6 +109,7 @@ func Load(configPath string) (*Config, error) {
 	v.BindEnv("storage.access_key", "MINIO_ACCESS_KEY")
 	v.BindEnv("storage.secret_key", "MINIO_SECRET_KEY")
 	v.BindEnv("auth.users.0.password", "CACHE_PASSWORD")
+	v.BindEnv("sentry.dsn", "SENTRY_DSN")
 
 	var cfg Config
 	if err := v.Unmarshal(&cfg); err != nil {
diff --git a/src/internal/handler/cache.go b/src/internal/handler/cache.go
deleted file mode 100644
index cda0b3c..0000000
--- a/src/internal/handler/cache.go
+++ /dev/null
@@ -1,149 +0,0 @@
-package handler
-
-import (
-	"errors"
-	"io"
-	"net/http"
-
-	"github.com/gin-gonic/gin"
-	"github.com/kevingruber/gradle-cache/internal/storage"
-	"github.com/rs/zerolog"
-)
-
-// CacheHandler handles Gradle build cache HTTP requests.
-type CacheHandler struct {
-	storage      storage.Storage
-	maxEntrySize int64
-	logger       zerolog.Logger
-}
-
-// NewCacheHandler creates a new cache handler.
-func NewCacheHandler(store storage.Storage, maxEntrySize int64, logger zerolog.Logger) *CacheHandler {
-	return &CacheHandler{
-		storage:      store,
-		maxEntrySize: maxEntrySize,
-		logger:       logger,
-	}
-}
-
-// Get handles GET requests to retrieve cache entries.
-// Gradle expects: 200 with body on hit, 404 on miss.
-func (h *CacheHandler) Get(c *gin.Context) {
-	key := c.Param("key")
-	if key == "" {
-		c.Status(http.StatusBadRequest)
-		return
-	}
-
-	reader, size, err := h.storage.Get(c.Request.Context(), key)
-	if err != nil {
-		if errors.Is(err, storage.ErrNotFound) {
-			c.Status(http.StatusNotFound)
-			return
-		}
-		h.logger.Error().Err(err).Str("key", key).Msg("failed to get cache entry")
-		c.Status(http.StatusInternalServerError)
-		return
-	}
-	defer reader.Close()
-
-	c.Header("Content-Type", "application/octet-stream")
-	c.Header("Content-Length", string(rune(size)))
-
-	c.DataFromReader(http.StatusOK, size, "application/octet-stream", reader, nil)
-}
-
-// Put handles PUT requests to store cache entries.
-// Gradle expects: 2xx on success, 413 if too large.
-func (h *CacheHandler) Put(c *gin.Context) {
-	key := c.Param("key")
-	if key == "" {
-		c.Status(http.StatusBadRequest)
-		return
-	}
-
-	// Check Content-Length header for size validation
-	contentLength := c.Request.ContentLength
-	if contentLength > h.maxEntrySize {
-		h.logger.Warn().
-			Str("key", key).
-			Int64("size", contentLength).
-			Int64("max_size", h.maxEntrySize).
-			Msg("cache entry too large")
-		c.Status(http.StatusRequestEntityTooLarge)
-		return
-	}
-
-	// Handle Expect: 100-continue
-	// Gin/Go handles this automatically, but we validate size first
-
-	// For chunked transfers or unknown size, we need to handle differently
-	if contentLength < 0 {
-		// Read with size limit
-		limitedReader := io.LimitReader(c.Request.Body, h.maxEntrySize+1)
-		data, err := io.ReadAll(limitedReader)
-		if err != nil {
-			h.logger.Error().Err(err).Str("key", key).Msg("failed to read request body")
-			c.Status(http.StatusInternalServerError)
-			return
-		}
-
-		if int64(len(data)) > h.maxEntrySize {
-			c.Status(http.StatusRequestEntityTooLarge)
-			return
-		}
-
-		contentLength = int64(len(data))
-		c.Request.Body = io.NopCloser(io.NewSectionReader(
-			&bytesReaderAt{data: data}, 0, contentLength,
-		))
-	}
-
-	err := h.storage.Put(c.Request.Context(), key, c.Request.Body, contentLength)
-	if err != nil {
-		h.logger.Error().Err(err).Str("key", key).Msg("failed to store cache entry")
-		c.Status(http.StatusInternalServerError)
-		return
-	}
-
-	c.Status(http.StatusCreated)
-}
-
-// Head handles HEAD requests to check cache entry existence.
-func (h *CacheHandler) Head(c *gin.Context) {
-	key := c.Param("key")
-	if key == "" {
-		c.Status(http.StatusBadRequest)
-		return
-	}
-
-	exists, err := h.storage.Exists(c.Request.Context(), key)
-	if err != nil {
-		h.logger.Error().Err(err).Str("key", key).Msg("failed to check cache entry existence")
-		c.Status(http.StatusInternalServerError)
-		return
-	}
-
-	if !exists {
-		c.Status(http.StatusNotFound)
-		return
-	}
-
-	c.Status(http.StatusOK)
-}
-
-// bytesReaderAt implements io.ReaderAt for a byte slice.
-type bytesReaderAt struct {
-	data []byte
-}
-
-func (b *bytesReaderAt) ReadAt(p []byte, off int64) (n int, err error) {
-	if off >= int64(len(b.data)) {
-		return 0, io.EOF
-	}
-	n = copy(p, b.data[off:])
-	if n < len(p) {
-		err = io.EOF
-	}
-	return
-}
diff --git a/src/internal/handler/cache_get.go b/src/internal/handler/cache_get.go
new file mode 100644
index 0000000..02c7175
--- /dev/null
+++ b/src/internal/handler/cache_get.go
@@ -0,0 +1,36 @@
+package handler
+
+import (
+	"errors"
+	"github.com/gin-gonic/gin"
+	"github.com/kevingruber/gradle-cache/internal/storage"
+	"net/http"
+)
+
+// Get handles GET requests to retrieve cache entries.
+// Gradle expects: 200 with body on hit, 404 on miss.
+func (h *CacheHandler) Get(c *gin.Context) {
+	key := c.Param("key")
+	if key == "" {
+		c.Status(http.StatusBadRequest)
+		return
+	}
+
+	reader, size, err := h.storage.Get(c.Request.Context(), key)
+	if err != nil {
+		if errors.Is(err, storage.ErrNotFound) {
+			h.metrics.CacheMisses.Add(c.Request.Context(), 1)
+			c.Status(http.StatusNotFound)
+			return
+		}
+		h.logger.Error().Err(err).Str("key", key).Msg("failed to get cache entry")
+		c.Status(http.StatusInternalServerError)
+		return
+	}
+	defer reader.Close()
+
+	c.Header("Content-Type", "application/octet-stream")
+	c.Header("Content-Length", string(rune(size)))
+	h.metrics.CacheHits.Add(c.Request.Context(), 1)
+	c.DataFromReader(http.StatusOK, size, "application/octet-stream", reader, nil)
+}
diff --git a/src/internal/handler/cache_head.go b/src/internal/handler/cache_head.go
new file mode 100644
index 0000000..26a33f9
--- /dev/null
+++ b/src/internal/handler/cache_head.go
@@ -0,0 +1,29 @@
+package handler
+
+import (
+	"github.com/gin-gonic/gin"
+	"net/http"
+)
+
+// Head handles HEAD requests to check cache entry existence.
+func (h *CacheHandler) Head(c *gin.Context) {
+	key := c.Param("key")
+	if key == "" {
+		c.Status(http.StatusBadRequest)
+		return
+	}
+
+	exists, err := h.storage.Exists(c.Request.Context(), key)
+	if err != nil {
+		h.logger.Error().Err(err).Str("key", key).Msg("failed to check cache entry existence")
+		c.Status(http.StatusInternalServerError)
+		return
+	}
+
+	if !exists {
+		c.Status(http.StatusNotFound)
+		return
+	}
+
+	c.Status(http.StatusOK)
+}
diff --git a/src/internal/handler/cache_put.go b/src/internal/handler/cache_put.go
new file mode 100644
index 0000000..f2fa8fc
--- /dev/null
+++ b/src/internal/handler/cache_put.go
@@ -0,0 +1,63 @@
+package handler
+
+import (
+	"github.com/gin-gonic/gin"
+	"io"
+	"net/http"
+)
+
+// Put handles PUT requests to store cache entries.
+// Gradle expects: 2xx on success, 413 if too large.
+func (h *CacheHandler) Put(c *gin.Context) {
+	key := c.Param("key")
+	if key == "" {
+		c.Status(http.StatusBadRequest)
+		return
+	}
+
+	// Check Content-Length header for size validation
+	contentLength := c.Request.ContentLength
+	if contentLength > h.maxEntrySize {
+		h.logger.Warn().
+			Str("key", key).
+			Int64("size", contentLength).
+			Int64("max_size", h.maxEntrySize).
+			Msg("cache entry too large")
+		c.Status(http.StatusRequestEntityTooLarge)
+		return
+	}
+
+	// Handle Expect: 100-continue
+	// Gin/Go handles this automatically, but we validate size first
+
+	// For chunked transfers or unknown size, we need to handle differently
+	if contentLength < 0 {
+		// Read with size limit
+		limitedReader := io.LimitReader(c.Request.Body, h.maxEntrySize+1)
+		data, err := io.ReadAll(limitedReader)
+		if err != nil {
+			h.logger.Error().Err(err).Str("key", key).Msg("failed to read request body")
+			c.Status(http.StatusInternalServerError)
+			return
+		}
+
+		if int64(len(data)) > h.maxEntrySize {
+			c.Status(http.StatusRequestEntityTooLarge)
+			return
+		}
+
+		contentLength = int64(len(data))
+		c.Request.Body = io.NopCloser(io.NewSectionReader(
+			&bytesReaderAt{data: data}, 0, contentLength,
+		))
+	}
+
+	err := h.storage.Put(c.Request.Context(), key, c.Request.Body, contentLength)
+	if err != nil {
+		h.logger.Error().Err(err).Str("key", key).Msg("failed to store cache entry")
+		c.Status(http.StatusInternalServerError)
+		return
+	}
+
+	c.Status(http.StatusCreated)
+}
diff --git a/src/internal/handler/handler.go b/src/internal/handler/handler.go
new file mode 100644
index 0000000..0b7b42e
--- /dev/null
+++ b/src/internal/handler/handler.go
@@ -0,0 +1,46 @@
+package handler
+
+import (
+	"github.com/kevingruber/gradle-cache/internal/storage"
+	"github.com/rs/zerolog"
+	"io"
+)
+
+// CacheHandler handles Gradle build cache HTTP requests.
+type CacheHandler struct {
+	storage      storage.Storage
+	maxEntrySize int64
+	logger       zerolog.Logger
+	metrics      *Metrics
+}
+
+// NewCacheHandler creates a new cache handler.
+func NewCacheHandler(store storage.Storage, maxEntrySize int64, logger zerolog.Logger) (*CacheHandler, error) {
+	metrics, err := NewMetrics()
+	if err != nil {
+		return nil, err
+	}
+
+	return &CacheHandler{
+		storage:      store,
+		maxEntrySize: maxEntrySize,
+		logger:       logger,
+		metrics:      metrics,
+	}, nil
+}
+
+// bytesReaderAt implements io.ReaderAt for a byte slice.
+type bytesReaderAt struct {
+	data []byte
+}
+
+func (b *bytesReaderAt) ReadAt(p []byte, off int64) (n int, err error) {
+	if off >= int64(len(b.data)) {
+		return 0, io.EOF
+	}
+	n = copy(p, b.data[off:])
+	if n < len(p) {
+		err = io.EOF
+	}
+	return
+}
diff --git a/src/internal/handler/metrics.go b/src/internal/handler/metrics.go
new file mode 100644
index 0000000..f55e696
--- /dev/null
+++ b/src/internal/handler/metrics.go
@@ -0,0 +1,44 @@
+package handler
+
+import (
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/metric"
+)
+
+type Metrics struct {
+	CacheHits   metric.Int64Counter
+	CacheMisses metric.Int64Counter
+	EntrySize   metric.Float64Histogram
+}
+
+func NewMetrics() (*Metrics, error) {
+	meter := otel.Meter("gradle-cache")
+
+	cacheHits, err := meter.Int64Counter(
+		"gradle_cache.cache_hits",
+		metric.WithDescription("Total number of cache hits"))
+	if err != nil {
+		return nil, err
+	}
+
+	cacheMisses, err := meter.Int64Counter(
+		"gradle_cache.cache_misses",
+		metric.WithDescription("Total number of cache misses"))
+	if err != nil {
+		return nil, err
+	}
+
+	entrySize, err := meter.Float64Histogram(
+		"gradle_cache.entry_size",
+		metric.WithDescription("Current size of items in cache"),
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return &Metrics{
+		CacheHits:   cacheHits,
+		CacheMisses: cacheMisses,
+		EntrySize:   entrySize,
+	}, nil
+}
diff --git a/src/internal/middleware/metrics.go b/src/internal/middleware/metrics.go
index 58da128..b9bb2bc 100644
--- a/src/internal/middleware/metrics.go
+++ b/src/internal/middleware/metrics.go
@@ -1,74 +1,46 @@
 package middleware
 
 import (
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/metric"
 	"strconv"
 	"time"
 
 	"github.com/gin-gonic/gin"
-	"github.com/prometheus/client_golang/prometheus"
-	"github.com/prometheus/client_golang/prometheus/promauto"
 )
 
-// Metrics holds all Prometheus metrics for the cache server.
+// Metrics holds all metrics for the cache server.
 type Metrics struct {
-	RequestsTotal    *prometheus.CounterVec
-	RequestDuration  *prometheus.HistogramVec
-	CacheHitsTotal   prometheus.Counter
-	CacheMissesTotal prometheus.Counter
-	StoredBytesTotal prometheus.Counter
-	EntrySize        prometheus.Histogram
+	RequestsTotal   metric.Int64Counter
+	RequestDuration metric.Float64Histogram
 }
 
 // NewMetrics creates and registers all Prometheus metrics.
-func NewMetrics(namespace string) *Metrics {
-	return &Metrics{
-		RequestsTotal: promauto.NewCounterVec(
-			prometheus.CounterOpts{
-				Namespace: namespace,
-				Name:      "requests_total",
-				Help:      "Total number of HTTP requests",
-			},
-			[]string{"method", "status"},
-		),
-		RequestDuration: promauto.NewHistogramVec(
-			prometheus.HistogramOpts{
-				Namespace: namespace,
-				Name:      "request_duration_seconds",
-				Help:      "HTTP request duration in seconds",
-				Buckets:   prometheus.DefBuckets,
-			},
-			[]string{"method"},
-		),
-		CacheHitsTotal: promauto.NewCounter(
-			prometheus.CounterOpts{
-				Namespace: namespace,
-				Name:      "cache_hits_total",
-				Help:      "Total number of cache hits",
-			},
-		),
-		CacheMissesTotal: promauto.NewCounter(
-			prometheus.CounterOpts{
-				Namespace: namespace,
-				Name:      "cache_misses_total",
-				Help:      "Total number of cache misses",
-			},
-		),
-		StoredBytesTotal: promauto.NewCounter(
-			prometheus.CounterOpts{
-				Namespace: namespace,
-				Name:      "stored_bytes_total",
-				Help:      "Total bytes stored in cache",
-			},
-		),
-		EntrySize: promauto.NewHistogram(
-			prometheus.HistogramOpts{
-				Namespace: namespace,
-				Name:      "entry_size_bytes",
-				Help:      "Size of cache entries in bytes",
-				Buckets:   prometheus.ExponentialBuckets(1024, 2, 20), // 1KB to 1GB
-			},
-		),
+func NewMetrics() (*Metrics, error) {
+	meter := otel.Meter("gradle-cache")
+
+	requestsTotal, err := meter.Int64Counter(
+		"gradle_cache.requests_total",
+		metric.WithDescription("Total number of cache requests"))
+	if err != nil {
+		return nil, err
+	}
+
+	requestDuration, err := meter.Float64Histogram(
+		"gradle_cache.request_duration_seconds",
+		metric.WithDescription("HTTP request duration in seconds"),
+		metric.WithUnit("s"),
+	)
+	if err != nil {
+		return nil, err
 	}
+
+	return &Metrics{
+		RequestsTotal:   requestsTotal,
+		RequestDuration: requestDuration,
+	}, nil
+
 }
 
 // Middleware creates a Gin middleware that records metrics.
@@ -76,7 +48,6 @@ func (m *Metrics) Middleware() gin.HandlerFunc {
 	return func(c *gin.Context) {
 		start := time.Now()
 
-		// Process request
 		c.Next()
 
 		// Record metrics
@@ -84,25 +55,15 @@ func (m *Metrics) Middleware() gin.HandlerFunc {
 		status := strconv.Itoa(c.Writer.Status())
 		method := c.Request.Method
 
-		m.RequestsTotal.WithLabelValues(method, status).Inc()
-		m.RequestDuration.WithLabelValues(method).Observe(duration)
+		attr := metric.WithAttributes(
+			attribute.String("method", method),
+			attribute.String("status", status),
+		)
+		m.RequestsTotal.Add(c.Request.Context(), 1, attr)
 
-		// Record cache hit/miss for GET requests
-		if method == "GET" && c.Param("key") != "" {
-			if c.Writer.Status() == 200 {
-				m.CacheHitsTotal.Inc()
-			} else if c.Writer.Status() == 404 {
-				m.CacheMissesTotal.Inc()
-			}
-		}
+		m.RequestDuration.Record(c.Request.Context(), duration,
+			metric.WithAttributes(
+				attribute.String("method", method)))
 
-		// Record stored bytes for PUT requests
-		if method == "PUT" && c.Writer.Status() >= 200 && c.Writer.Status() < 300 {
-			size := c.Request.ContentLength
-			if size > 0 {
-				m.StoredBytesTotal.Add(float64(size))
-				m.EntrySize.Observe(float64(size))
-			}
-		}
 	}
 }
diff --git a/src/internal/server/server.go b/src/internal/server/server.go
index 6edb3a9..d5f2f4e 100644
--- a/src/internal/server/server.go
+++ b/src/internal/server/server.go
@@ -41,7 +41,11 @@ func New(cfg *config.Config, store storage.Storage, logger zerolog.Logger) *Serv
 
 	// Initialize metrics if enabled
 	if cfg.Metrics.Enabled {
-		s.metrics = middleware.NewMetrics("gradle_cache")
+		metrics, err := middleware.NewMetrics()
+		if err != nil {
+			logger.Fatal().Err(err).Msg("Failed to initialize metrics")
+		}
+		s.metrics = metrics
 	}
 
 	s.setupRoutes()
@@ -71,12 +75,16 @@ func (s *Server) setupRoutes() {
 	}
 
 	// Cache endpoints
-	cacheHandler := handler.NewCacheHandler(
+	cacheHandler, err := handler.NewCacheHandler(
 		s.storage,
 		s.cfg.MaxEntrySizeBytes(),
 		s.logger,
 	)
 
+	if err != nil {
+		s.logger.Fatal().Err(err).Msg("Failed to initialize cache")
+	}
+
 	// Create cache group with optional auth
 	cacheGroup := s.router.Group("/cache")
 	if s.cfg.Auth.Enabled {
diff --git a/src/internal/telemetry/telemetry.go b/src/internal/telemetry/telemetry.go
new file mode 100644
index 0000000..64b3090
--- /dev/null
+++ b/src/internal/telemetry/telemetry.go
@@ -0,0 +1,51 @@
+package telemetry
+
+import (
+	"context"
+	"github.com/getsentry/sentry-go"
+	sentryotel "github.com/getsentry/sentry-go/otel"
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/exporters/prometheus"
+	sdkmetric "go.opentelemetry.io/otel/sdk/metric"
+	sdktrace "go.opentelemetry.io/otel/sdk/trace"
+	"time"
+)
+
+func SetupTelemetry(sentryEnabled bool, sentryDSN string) (func(), error) {
+
+	// setup prometheus
+	exporter, err := prometheus.New()
+	if err != nil {
+		return nil, err
+	}
+	provider := sdkmetric.NewMeterProvider(sdkmetric.WithReader(exporter))
+	otel.SetMeterProvider(provider)
+
+	// setup sentry
+
+	if !sentryEnabled {
+		return nil, nil
+	}
+
+	err = sentry.Init(sentry.ClientOptions{
+		Dsn:              sentryDSN,
+		EnableTracing:    true,
+		TracesSampleRate: 1,
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	spanExporter := sentryotel.NewSentrySpanProcessor()
+
+	tp := sdktrace.NewTracerProvider(
+		sdktrace.WithSpanProcessor(spanExporter))
+
+	otel.SetTracerProvider(tp)
+
+	cleanup := func() {
+		tp.Shutdown(context.Background())
+		sentry.Flush(2 * time.Second)
+	}
+	return cleanup, nil
+}