diff --git a/routers/api/packages/npm/api.go b/routers/api/packages/npm/api.go
index ffde98b3faf..ec72a2b69f4 100644
--- a/routers/api/packages/npm/api.go
+++ b/routers/api/packages/npm/api.go
@@ -9,6 +9,7 @@ import (
 	"fmt"
 	"net/url"
 	"sort"
+	"time"
 
 	packages_model "gitea.dev/models/packages"
 	npm_module "gitea.dev/modules/packages/npm"
@@ -22,8 +23,14 @@ func createPackageMetadataResponse(registryURL string, pds []*packages_model.Pac
 
 	versions := make(map[string]*npm_module.PackageMetadataVersion)
 	distTags := make(map[string]string)
+	times := make(map[string]time.Time)
+	firstPublished, lastPublished := pds[0].Version.CreatedUnix, pds[0].Version.CreatedUnix
 	for _, pd := range pds {
-		versions[pd.SemVer.String()] = createPackageMetadataVersion(registryURL, pd)
+		semVer := pd.SemVer.String()
+		versions[semVer] = createPackageMetadataVersion(registryURL, pd)
+		times[semVer] = pd.Version.CreatedUnix.AsTimeInLocation(time.UTC)
+		firstPublished = min(firstPublished, pd.Version.CreatedUnix)
+		lastPublished = max(lastPublished, pd.Version.CreatedUnix)
 
 		for _, pvp := range pd.VersionProperties {
 			if pvp.Name == npm_module.TagProperty {
@@ -32,6 +39,10 @@ func createPackageMetadataResponse(registryURL string, pds []*packages_model.Pac
 		}
 	}
 
+	// npm derives both from the versions currently served, so a deletion moves them
+	times["created"] = firstPublished.AsTimeInLocation(time.UTC)
+	times["modified"] = lastPublished.AsTimeInLocation(time.UTC)
+
 	latest := pds[len(pds)-1]
 
 	metadata := latest.Metadata.(*npm_module.Metadata)
@@ -42,7 +53,10 @@ func createPackageMetadataResponse(registryURL string, pds []*packages_model.Pac
 		DistTags:    distTags,
 		Description: metadata.Description,
 		Readme:      metadata.Readme,
+		Maintainers: []npm_module.User{{Name: latest.Owner.Name}},
+		Time:        times,
 		Homepage:    metadata.ProjectURL,
+		Keywords:    metadata.Keywords,
 		Author:      npm_module.User{Name: metadata.Author},
 		License:     metadata.License,
 		Versions:    versions,
@@ -61,8 +75,10 @@ func createPackageMetadataVersion(registryURL string, pd *packages_model.Package
 		Version:              pd.Version.Version,
 		Description:          metadata.Description,
 		Author:               npm_module.User{Name: metadata.Author},
+		Maintainers:          []npm_module.User{{Name: pd.Owner.Name}},
 		Homepage:             metadata.ProjectURL,
 		License:              metadata.License,
+		Keywords:             metadata.Keywords,
 		Dependencies:         metadata.Dependencies,
 		BundleDependencies:   metadata.BundleDependencies,
 		DevDependencies:      metadata.DevelopmentDependencies,
diff --git a/routers/api/packages/npm/api_test.go b/routers/api/packages/npm/api_test.go
new file mode 100644
index 00000000000..ab3a5821453
--- /dev/null
+++ b/routers/api/packages/npm/api_test.go
@@ -0,0 +1,46 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package npm
+
+import (
+	"testing"
+	"time"
+
+	packages_model "gitea.dev/models/packages"
+	user_model "gitea.dev/models/user"
+	npm_module "gitea.dev/modules/packages/npm"
+	"gitea.dev/modules/timeutil"
+
+	"github.com/hashicorp/go-version"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCreatePackageMetadataResponse(t *testing.T) {
+	descriptor := func(v string, publishedUnix int64) *packages_model.PackageDescriptor {
+		return &packages_model.PackageDescriptor{
+			Package:  &packages_model.Package{Name: "test"},
+			Owner:    &user_model.User{Name: "alice"},
+			Version:  &packages_model.PackageVersion{Version: v, CreatedUnix: timeutil.TimeStamp(publishedUnix)},
+			SemVer:   version.Must(version.NewVersion(v)),
+			Metadata: &npm_module.Metadata{Keywords: []string{"gitea"}},
+			Files:    []*packages_model.PackageFileDescriptor{{File: &packages_model.PackageFile{}, Blob: &packages_model.PackageBlob{}}},
+		}
+	}
+
+	result := createPackageMetadataResponse("https://gitea.dev/api/packages/alice/npm", []*packages_model.PackageDescriptor{
+		descriptor("1.1.0", 1000),
+		descriptor("1.0.0", 2000),
+	})
+
+	assert.Equal(t, map[string]time.Time{
+		"1.0.0":    time.Unix(2000, 0).UTC(),
+		"1.1.0":    time.Unix(1000, 0).UTC(),
+		"created":  time.Unix(1000, 0).UTC(),
+		"modified": time.Unix(2000, 0).UTC(),
+	}, result.Time)
+	assert.Equal(t, []npm_module.User{{Name: "alice"}}, result.Maintainers)
+	assert.Equal(t, []string{"gitea"}, result.Keywords)
+	assert.Equal(t, []string{"gitea"}, result.Versions["1.0.0"].Keywords)
+	assert.Equal(t, []npm_module.User{{Name: "alice"}}, result.Versions["1.0.0"].Maintainers)
+}