diff --git a/clients/qms.go b/clients/qms.go
deleted file mode 100644
index 478716a..0000000
--- a/clients/qms.go
+++ /dev/null
@@ -1,79 +0,0 @@
-package clients
-
-import (
-	"context"
-	"encoding/json"
-	"fmt"
-	"io"
-	"net/http"
-	"net/url"
-	"strings"
-
-	"github.com/pkg/errors"
-)
-
-// QMSAPI represents an instance of a QMS API client.
-type QMSAPI struct {
-	baseURL *url.URL
-}
-
-// QMSAPIClient returns a new QMSAPI instance.
-func QMSAPIClient(baseURL string) (*QMSAPI, error) {
-
-	//  Parse the raw base URL.
-	url, err := url.Parse(baseURL)
-	if err != nil {
-		return nil, err
-	}
-
-	// Ensure that the base URL path doesn't end with a slash.
-	url.Path = strings.TrimSuffix(url.Path, "/")
-
-	return &QMSAPI{baseURL: url}, nil
-}
-
-type SubscriptionResult struct {
-	Result Subscription `json:"result"`
-}
-
-// qmsURL returns a URL that can be used to connect to QMS. The URL path is determined by the base URL and the path
-// components in the argument list.
-func (c QMSAPI) qmsURL(components ...string) *url.URL {
-	return BuildURL(c.baseURL, components...)
-}
-
-// GetSubscription retrieves the subscription information for the given user.
-func (c *QMSAPI) GetSubscription(ctx context.Context, username string) (*Subscription, error) {
-	var upr SubscriptionResult
-
-	// Build the request.
-	requestURL := c.qmsURL("v1", "users", StripUsernameSuffix(username), "plan")
-	req, err := http.NewRequestWithContext(ctx, http.MethodGet, requestURL.String(), nil)
-	if err != nil {
-		return &upr.Result, errors.Wrapf(err, "unable to build the request for %s", requestURL)
-	}
-
-	// Get the response.
-	resp, err := client.Do(req)
-	if err != nil {
-		return &upr.Result, errors.Wrapf(err, "unable to send the request to %s", requestURL)
-	}
-	defer resp.Body.Close()
-	if resp.StatusCode < 200 || resp.StatusCode > 299 {
-		return &upr.Result, NewHTTPError(resp.StatusCode, fmt.Sprintf("%s returned %d", requestURL, resp.StatusCode))
-	}
-
-	// Read the response body.
-	body, err := io.ReadAll(resp.Body)
-	if err != nil {
-		return &upr.Result, errors.Wrapf(err, "unable to read the response from %s", requestURL)
-	}
-
-	// Unmarshal the response body.
-	err = json.Unmarshal(body, &upr)
-	if err != nil {
-		return &upr.Result, errors.Wrapf(err, "unable to parse the response from %s", requestURL)
-	}
-
-	return &upr.Result, nil
-}
diff --git a/internal/internal.go b/internal/internal.go
index f41d152..3e48b9b 100644
--- a/internal/internal.go
+++ b/internal/internal.go
@@ -26,7 +26,6 @@ type App struct {
 	amqpClient           *amqp.AMQP
 	natsClient           *nats.EncodedConn
 	amqpUsageRoutingKey  string
-	qmsClient            *clients.QMSAPI
 	qmsEnabled           bool
 	subscriptionsBaseURI string
 }
@@ -40,7 +39,6 @@ type AppConfiguration struct {
 	NATSClient               *nats.EncodedConn
 	AMQPUsageRoutingKey      string
 	QMSEnabled               bool
-	QMSBaseURL               string
 	SubscriptionsBaseURI     string
 }
 
@@ -63,10 +61,6 @@ func New(db *sqlx.DB, config *AppConfiguration) (*App, error) {
 	if err != nil {
 		return nil, errors.Wrap(err, "unable to create the data-usage-api client")
 	}
-	qmsClient, err := clients.QMSAPIClient(config.QMSBaseURL)
-	if err != nil {
-		return nil, errors.Wrap(err, "unable to create the QMS client")
-	}
 
 	// Create the app instance.
 	app := &App{
@@ -77,7 +71,6 @@ func New(db *sqlx.DB, config *AppConfiguration) (*App, error) {
 		amqpClient:           config.AMQPClient,
 		natsClient:           config.NATSClient,
 		amqpUsageRoutingKey:  config.AMQPUsageRoutingKey,
-		qmsClient:            qmsClient,
 		qmsEnabled:           config.QMSEnabled,
 		subscriptionsBaseURI: config.SubscriptionsBaseURI,
 	}
diff --git a/main.go b/main.go
index e50193f..55b7431 100644
--- a/main.go
+++ b/main.go
@@ -133,13 +133,6 @@ func main() {
 	}
 
 	qmsEnabled := config.Bool("qms.enabled")
-	qmsBaseURL := config.String("qms.base")
-
-	if qmsEnabled {
-		if qmsBaseURL == "" {
-			log.Fatal("qms.base must be set in the configuration file if qms.enabled is true")
-		}
-	}
 
 	natsCluster := config.String("nats.cluster")
 	if natsCluster == "" {
@@ -224,7 +217,6 @@ func main() {
 		NATSClient:           natsClient,
 		AMQPUsageRoutingKey:  *usageRoutingKey,
 		QMSEnabled:           qmsEnabled,
-		QMSBaseURL:           qmsBaseURL,
 		SubscriptionsBaseURI: *subscriptionsBase,
 	}