@atripp thanks everything works with inedo/proget:25.0.10-ci.9

here is maven http client source code with exact check that it expects 200 or 304
https://maven.apache.org/components/wagon-archives/wagon-3.0.0/xref/org/apache/maven/wagon/shared/http/AbstractHttpClientWagon.html#L708

we have same problem. Only reason what I could find is 201. here is maven exception stack trace in debug mode:

[DEBUG] Could not validate SHA-1 checksum for commons-codec/commons-codec/1.19.0/commons-codec-1.19.0.jar

org.eclipse.aether.transfer.ChecksumFailureException:
  Checksum validation failed: transfer failed for
  https://proget-test.airbaltic.com/maven2/libs-release/commons-codec/commons-codec/1.19.0/commons-codec-1.19.0.jar.sha1,
  status: 201 Created

    at org.eclipse.aether.connector.basic.ChecksumValidator.validateExternalChecksums(ChecksumValidator.java:164)
    at org.eclipse.aether.connector.basic.ChecksumValidator.validate(ChecksumValidator.java:103)
    at org.eclipse.aether.connector.basic.BasicRepositoryConnector$GetTaskRunner.runTask(BasicRepositoryConnector.java:460)
    at org.eclipse.aether.connector.basic.BasicRepositoryConnector$TaskRunner.run(BasicRepositoryConnector.java:364)
    at org.eclipse.aether.util.concurrency.RunnableErrorForwarder$1.run(RunnableErrorForwarder.java:75)
    at org.eclipse.aether.connector.basic.BasicRepositoryConnector$DirectExecutor.execute(BasicRepositoryConnector.java:628)
    at org.eclipse.aether.connector.basic.BasicRepositoryConnector.get(BasicRepositoryConnector.java:262)
    at org.eclipse.aether.internal.impl.DefaultArtifactResolver.performDownloads(DefaultArtifactResolver.java:514)
    at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:402)
    at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifacts(DefaultArtifactResolver.java:229)
    at org.eclipse.aether.internal.impl.DefaultRepositorySystem.resolveDependencies(DefaultRepositorySystem.java:340)
    at org.apache.maven.shared.transfer.dependencies.resolve.internal.Maven31DependencyResolver.resolveDependencies(Maven31DependencyResolver.java:216)
    at org.apache.maven.shared.transfer.dependencies.resolve.internal.Maven31DependencyResolver.resolveDependencies(Maven31DependencyResolver.java:117)
    at org.apache.maven.shared.transfer.dependencies.resolve.internal.DefaultDependencyResolver.resolveDependencies(DefaultDependencyResolver.java:76)
    at org.apache.maven.plugins.dependency.GetMojo.execute(GetMojo.java:179)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:137)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2(MojoExecutor.java:370)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute(MojoExecutor.java:351)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:215)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:171)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:163)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:298)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:960)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:293)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:196)
    at jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
    at java.lang.reflect.Method.invoke(Method.java:580)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:283)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:226)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:407)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:348)

Caused by: org.apache.maven.wagon.TransferFailedException:
  transfer failed for
  https://proget-test.airbaltic.com/maven2/libs-release/commons-codec/commons-codec/1.19.0/commons-codec-1.19.0.jar.sha1,
  status: 201 Created

    at org.apache.maven.wagon.providers.http.wagon.shared.AbstractHttpClientWagon.fillInputData(AbstractHttpClientWagon.java:1204)
    at org.apache.maven.wagon.providers.http.wagon.shared.AbstractHttpClientWagon.fillInputData(AbstractHttpClientWagon.java:1140)
    at org.apache.maven.wagon.StreamWagon.getInputStream(StreamWagon.java:126)
    at org.apache.maven.wagon.StreamWagon.getIfNewer(StreamWagon.java:88)
    at org.apache.maven.wagon.StreamWagon.get(StreamWagon.java:61)
    at org.eclipse.aether.transport.wagon.WagonTransporter$GetTaskRunner.run(WagonTransporter.java:546)
    at org.eclipse.aether.transport.wagon.WagonTransporter.execute(WagonTransporter.java:430)
    at org.eclipse.aether.transport.wagon.WagonTransporter.get(WagonTransporter.java:407)
    at org.eclipse.aether.connector.basic.BasicRepositoryConnector$GetTaskRunner.fetchChecksum(BasicRepositoryConnector.java:424)
    at org.eclipse.aether.connector.basic.ChecksumValidator.validateExternalChecksums(ChecksumValidator.java:157)
    at org.eclipse.aether.connector.basic.ChecksumValidator.validate(ChecksumValidator.java:103)
    at org.eclipse.aether.connector.basic.BasicRepositoryConnector$GetTaskRunner.runTask(BasicRepositoryConnector.java:460)
    at org.eclipse.aether.connector.basic.BasicRepositoryConnector$TaskRunner.run(BasicRepositoryConnector.java:364)
    at org.eclipse.aether.util.concurrency.RunnableErrorForwarder$1.run(RunnableErrorForwarder.java:75)
    at org.eclipse.aether.connector.basic.BasicRepositoryConnector$DirectExecutor.execute(BasicRepositoryConnector.java:628)
    at org.eclipse.aether.connector.basic.BasicRepositoryConnector.get(BasicRepositoryConnector.java:262)
    at org.eclipse.aether.internal.impl.DefaultArtifactResolver.performDownloads(DefaultArtifactResolver.java:514)
    at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:402)
    at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifacts(DefaultArtifactResolver.java:229)
    at org.eclipse.aether.internal.impl.DefaultRepositorySystem.resolveDependencies(DefaultRepositorySystem.java:340)
    at org.apache.maven.shared.transfer.dependencies.resolve.internal.Maven31DependencyResolver.resolveDependencies(Maven31DependencyResolver.java:216)
    at org.apache.maven.shared.transfer.dependencies.resolve.internal.Maven31DependencyResolver.resolveDependencies(Maven31DependencyResolver.java:117)
    at org.eclipse.aether.shared.transfer.dependencies.resolve.internal.DefaultDependencyResolver.resolveDependencies(DefaultDependencyResolver.java:76)
    at org.apache.maven.plugins.dependency.GetMojo.execute(GetMojo.java:179)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:137)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2(MojoExecutor.java:370)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute(MojoExecutor.java:351)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:215)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:171)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:163)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:298)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:960)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:293)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:196)
    at jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
    at java.lang.reflect.Method.invoke(Method.java:580)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:283)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:226)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:407)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:348)

curl https://proget-test.airbaltic.com/maven2/libs-release/commons-codec/commons-codec/1.19.0/commons-codec-1.19.0.jar.md5 -i
HTTP/1.1 201 Created
Server: nginx
Date: Thu, 04 Sep 2025 07:13:17 GMT
Content-Type: text/plain
Content-Length: 32
Connection: keep-alive
Cache-Control: private
X-ProGet-Version: 25.0.9.16
X-ProGet-Edition: enterprise

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