diff --git a/plugin/src/main/kotlin/com/vanniktech/maven/publish/MavenPublishBaseExtension.kt b/plugin/src/main/kotlin/com/vanniktech/maven/publish/MavenPublishBaseExtension.kt
index bb638488..1ca3d735 100644
--- a/plugin/src/main/kotlin/com/vanniktech/maven/publish/MavenPublishBaseExtension.kt
+++ b/plugin/src/main/kotlin/com/vanniktech/maven/publish/MavenPublishBaseExtension.kt
@@ -9,6 +9,7 @@ import javax.inject.Inject
 import org.gradle.api.Action
 import org.gradle.api.Incubating
 import org.gradle.api.Project
+import org.gradle.api.artifacts.repositories.MavenArtifactRepository
 import org.gradle.api.credentials.PasswordCredentials
 import org.gradle.api.provider.Property
 import org.gradle.api.publish.maven.MavenPom
@@ -59,10 +60,12 @@ abstract class MavenPublishBaseExtension @Inject constructor(
     sonatypeHost.set(host)
     sonatypeHost.finalizeValue()
 
+    val versionIsSnapshot = version.map { it.endsWith("-SNAPSHOT") }
+
     val buildService = project.registerSonatypeRepositoryBuildService(
       sonatypeHost = sonatypeHost,
       groupId = groupId,
-      versionIsSnapshot = version.map { it.endsWith("-SNAPSHOT") },
+      versionIsSnapshot = versionIsSnapshot,
       repositoryUsername = project.providers.gradleProperty("mavenCentralUsername"),
       repositoryPassword = project.providers.gradleProperty("mavenCentralPassword"),
       automaticRelease = automaticRelease,
@@ -74,7 +77,10 @@ abstract class MavenPublishBaseExtension @Inject constructor(
     project.gradlePublishing.repositories.maven { repo ->
       repo.name = "mavenCentral"
       repo.setUrl(buildService.map { it.publishingUrl() })
-      if (!host.isCentralPortal) {
+    }
+
+    project.gradlePublishing.repositories.withType(MavenArtifactRepository::class.java) { repo ->
+      if (repo.name == "mavenCentral" && (!host.isCentralPortal || versionIsSnapshot.get())) {
         repo.credentials(PasswordCredentials::class.java)
       }
     }
diff --git a/plugin/src/main/kotlin/com/vanniktech/maven/publish/sonatype/SonatypeRepositoryBuildService.kt b/plugin/src/main/kotlin/com/vanniktech/maven/publish/sonatype/SonatypeRepositoryBuildService.kt
index 45086030..836e691a 100644
--- a/plugin/src/main/kotlin/com/vanniktech/maven/publish/sonatype/SonatypeRepositoryBuildService.kt
+++ b/plugin/src/main/kotlin/com/vanniktech/maven/publish/sonatype/SonatypeRepositoryBuildService.kt
@@ -183,11 +183,11 @@ internal abstract class SonatypeRepositoryBuildService :
       }
 
       val host = parameters.sonatypeHost.get()
-      require(!host.isCentralPortal) {
-        "Snapshots are not supported when publishing through the central portal."
+      if (host.isCentralPortal) {
+        "${host.rootUrl}/repository/maven-snapshots/"
+      } else {
+        "${host.rootUrl}/content/repositories/snapshots/"
       }
-
-      "${host.rootUrl}/content/repositories/snapshots/"
     } else {
       val stagingRepositoryId = requireNotNull(uploadId) {
         @Suppress("UnstableApiUsage")