diff --git a/cmd/itemize/main.go b/cmd/itemize/main.go
index 970868f..2a74d03 100644
--- a/cmd/itemize/main.go
+++ b/cmd/itemize/main.go
@@ -125,4 +125,14 @@ func printUsage() {
 	fmt.Println("  -force           Force reprocess already processed orders")
 	fmt.Println("  -verbose         Verbose output")
 	fmt.Println("  -order-id string Process only this specific order ID (limits blast radius)")
+	fmt.Println()
+	fmt.Println("Environment Variables:")
+	fmt.Println("  MONARCH_TOKEN              Monarch Money API token (required)")
+	fmt.Println("  OPENAI_API_KEY             OpenAI API key")
+	fmt.Println("  ANTHROPIC_API_KEY          Anthropic Claude API key")
+	fmt.Println("  CATEGORIZER_PROVIDER       Force backend: 'openai' or 'anthropic'")
+	fmt.Println()
+	fmt.Println("Provider-Specific Environment Variables:")
+	fmt.Println("  AMAZON_ACCOUNT_NAME        Amazon browser profile name (optional)")
+	fmt.Println("                             Run 'amazon-scraper --login --profile <name>' first")
 }
diff --git a/go.mod b/go.mod
index e70eb90..467af06 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module github.com/eshaffer321/monarchmoney-sync-backend
 go 1.25.11
 
 require (
-	github.com/eshaffer321/costco-go v0.3.10
+	github.com/eshaffer321/costco-go v0.3.11
 	github.com/eshaffer321/monarchmoney-go v1.0.5
 	github.com/eshaffer321/walmart-client-go/v2 v2.0.1
 	github.com/go-chi/chi/v5 v5.2.5
diff --git a/go.sum b/go.sum
index c05c435..fdff4f3 100644
--- a/go.sum
+++ b/go.sum
@@ -2,8 +2,8 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
 github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
-github.com/eshaffer321/costco-go v0.3.10 h1:Lp8ZUEuLQC3ciGHWWjiPxMOez+hJe9YZ2JmlHxeC/HI=
-github.com/eshaffer321/costco-go v0.3.10/go.mod h1:ANJTHfRSPyot9cWKNlfs5qDKRKkA4tYORrorvWx/vbM=
+github.com/eshaffer321/costco-go v0.3.11 h1:vOEXcSj/vGlwE/4AbXK3uUdXG7XYg1qfUPViujJRS7Q=
+github.com/eshaffer321/costco-go v0.3.11/go.mod h1:ANJTHfRSPyot9cWKNlfs5qDKRKkA4tYORrorvWx/vbM=
 github.com/eshaffer321/monarchmoney-go v1.0.5 h1:V3iP0bvB1q3+m9Gkl6KBCFL44sNsiHDbTxSOU9fHZco=
 github.com/eshaffer321/monarchmoney-go v1.0.5/go.mod h1:ZKPCYT7NcsKGI+YpJ2EqPtfE3dKfuPbiTUrj6J84ot4=
 github.com/eshaffer321/walmart-client-go/v2 v2.0.1 h1:R8NFqKqfdri02Jhmr6jOMpCLAzjdiRbStLtjGKo6WaA=
diff --git a/internal/cli/flags.go b/internal/cli/flags.go
index da3207a..143803f 100644
--- a/internal/cli/flags.go
+++ b/internal/cli/flags.go
@@ -2,6 +2,8 @@ package cli
 
 import (
 	"flag"
+	"fmt"
+	"os"
 
 	"github.com/eshaffer321/monarchmoney-sync-backend/internal/application/sync"
 )
@@ -25,6 +27,24 @@ func ParseSyncFlags() SyncFlags {
 	flag.BoolVar(&flags.Force, "force", false, "Force reprocess already processed orders")
 	flag.BoolVar(&flags.Verbose, "verbose", false, "Verbose output")
 	flag.StringVar(&flags.OrderID, "order-id", "", "Process only this specific order ID (limits blast radius)")
+
+	flag.Usage = func() {
+		fmt.Fprintln(os.Stderr, "Usage: itemize <command> [flags]")
+		fmt.Fprintln(os.Stderr)
+		fmt.Fprintln(os.Stderr, "Sync Flags:")
+		flag.PrintDefaults()
+		fmt.Fprintln(os.Stderr)
+		fmt.Fprintln(os.Stderr, "Environment Variables:")
+		fmt.Fprintln(os.Stderr, "  MONARCH_TOKEN              Monarch Money API token (required)")
+		fmt.Fprintln(os.Stderr, "  OPENAI_API_KEY             OpenAI API key")
+		fmt.Fprintln(os.Stderr, "  ANTHROPIC_API_KEY          Anthropic Claude API key")
+		fmt.Fprintln(os.Stderr, "  CATEGORIZER_PROVIDER       Force backend: 'openai' or 'anthropic'")
+		fmt.Fprintln(os.Stderr)
+		fmt.Fprintln(os.Stderr, "Provider-Specific Environment Variables:")
+		fmt.Fprintln(os.Stderr, "  AMAZON_ACCOUNT_NAME        Amazon browser profile name (optional)")
+		fmt.Fprintln(os.Stderr, "                             Run 'amazon-scraper --login --profile <name>' first")
+	}
+
 	flag.Parse()
 	return flags
 }