diff --git a/.github/workflows/api-diff.yml b/.github/workflows/api-diff.yml
new file mode 100644
index 0000000000..09fca0949f
--- /dev/null
+++ b/.github/workflows/api-diff.yml
@@ -0,0 +1,34 @@
+name: Analyze API Changes
+description: Runs apidiff-go action to check for breaking changes to modules' public APIs
+
+on:
+  pull_request:
+
+jobs:
+  root-module:
+    name: Root Module
+    permissions:
+      pull-requests: write
+      contents: read
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout the repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: "go.mod"
+          cache: false
+
+      - uses: smartcontractkit/.github/actions/changed-modules-go@feat/changed-modules-go
+        id: changed-modules
+
+      - uses: smartcontractkit/.github/actions/apidiff-go@apidiff-go/0.1.0
+        env:
+          GITHUB_TOKEN: ${{ github.token }}
+        with:
+          go-mod-paths: "${{ steps.changed-modules.outputs.modified-modules }}"
+          enforce-compatible: "false" # dont fail on breaking changes
diff --git a/pkg/monitoring/monitor.go b/pkg/monitoring/monitor.go
index dd158a0264..761cf271a0 100644
--- a/pkg/monitoring/monitor.go
+++ b/pkg/monitoring/monitor.go
@@ -42,6 +42,8 @@ type Monitor struct {
 	Manager Manager
 
 	HTTPServer HTTPServer
+
+	NewParam uint64
 }
 
 // NewMonitor builds a new Monitor instance using dependency injection.
@@ -56,6 +58,7 @@ func NewMonitor(
 	txResultsSourceFactory SourceFactory,
 	feedsParser FeedsParser,
 	nodesParser NodesParser,
+	newParam uint64,
 ) (*Monitor, error) {
 	cfg, err := config.Parse()
 	if err != nil {
@@ -147,6 +150,7 @@ func NewMonitor(
 		RDDPoller:         rddPoller,
 		Manager:           manager,
 		HTTPServer:        httpServer,
+		NewParam:          newParam,
 	}, nil
 }
 
diff --git a/pkg/utils/mailbox/mailbox.go b/pkg/utils/mailbox/mailbox.go
index 6b84eb5246..08aba8a89d 100644
--- a/pkg/utils/mailbox/mailbox.go
+++ b/pkg/utils/mailbox/mailbox.go
@@ -31,9 +31,12 @@ func NewHighCapacity[T any]() *Mailbox[T] {
 // NewSingle returns a new Mailbox with capacity one.
 func NewSingle[T any]() *Mailbox[T] { return New[T](1) }
 
+// NewSingleDuplicate copies the above function to demonstrate API analysis
+func NewSingleDuplicate[T any]() *Mailbox[T] { return New[T](1) }
+
 // New creates a new mailbox instance. If name is non-empty, it must be unique and calling Start will launch
 // prometheus metric monitor that periodically reports mailbox load until Close() is called.
-func New[T any](capacity uint64) *Mailbox[T] {
+func New[T any](capacity uint32) *Mailbox[T] {
 	queueCap := capacity
 	if queueCap == 0 {
 		queueCap = 100
@@ -41,7 +44,7 @@ func New[T any](capacity uint64) *Mailbox[T] {
 	return &Mailbox[T]{
 		chNotify: make(chan struct{}, 1),
 		queue:    make([]T, 0, queueCap),
-		capacity: capacity,
+		capacity: uint64(capacity),
 	}
 }