Final version of Windows Web Services API for Windows XP, Vista, Server 2003 and Server 2008 is now available!

The final version of the Windows Web Services API for Windows XP, Windows Vista, Windows Server 2003 and Windows Server 2008 is now available. This version corresponds to the final version of the WWSAPI released as part of Windows 7 and Windows Server 2008 R2. To develop for this version of the runtime, you need to install Microsoft Windows SDK for Windows 7 and .NET Framework 3.5 SP1. Please make sure to regenerate all code using the new version of wsutil.exe tool. You will also need to rebuild all source code that used any of the pre-released versions of this API.

This release is available in 25 languages: Arabic, Chinese - Hongkong, Chinese - Simplified, Chinese - Traditional, Czech, Danish, Dutch, English, Finnish, French, German, Greek, Hebrew, Hungarian, Italian, Japanese, Korean, Norwegian , Polish, Portuguese (Brazil), Portuguese (Portugal), Russian, Spanish, Swedish, Turkish. The table below summarizes CPU architectures and the minimal level of Service Packs supported by this release. Make sure to deploy the latest service pack and all critical updates for the version of Windows to computers on which you plan to install this release. To find recent security updates, visit Windows Update.

 Windows Version

Service Pack




Windows XP





Windows Server 2003

SP2, R2 SP2




Windows Vista





Windows Server 2008





In contrast to the past pre-released version of this API, this final version release can be used in production code and redistributed with the final versions of the product. Because of this, the final version is only available to companies who agree to terms of Windows Master Redistribution License Agreement (MRLA). To acquire the redistributable installers for this release and a copy of the Windows MRLA for review, please email a formal request to In your email, please include a brief description of your plans for using this release and the business contact information for your company using which you can be reached at later on. If you have questions about this release, please email them to

Comments (11)

  1. powershell says:

    I can’t see this on Windows Update for either Vista or XP (32-bit or 64-bit). Why is this not available publicly like the pre-release?

  2. Damian says:

    What can I say! That’s typical Microsoft.

    Why not making the redistributable installers for the "older" platforms free for download. Do want to position Windows as a reliable development platform for WebServices? Or do you only want to put obstacles in the developer’s way?

    Forcing everybody to send formal emails to get access to a simple DLL installer is not quite the way to promote web service development on Windows.

    Ozzy is promoting the Cloud and a product team delivering a vital component for the Cloud-Vision hinders the developers to realize the Cloud. Stupid …

    What are your fears? Not selling Windows Server 2008 R2 or Windows 7?

    Looking forward for an answer 😀


  3. John McIntyre says:

    Having decided to use WWSAPI for the next release of our product, it’s hugely disappointing that we now can’t because of the MRLA.  (I haven’t seen it but the lawyers say it contains terms that we couldn’t possibly agree to, allowing MS to withdraw redistribution rights at very short notice.)

    Assuming that other companies feel the same way about the licensing, and that very few products will be shipping in the near future with support limited to Windows 7 and Windows 2008 R2, it seems that WWSAPI is still born.   Which is a huge shame because it’s great technology – we’re really struggling to fill the gap left by our inability to use it.

    Is there any chance this decision will be revisited?

  4. Jose Navarro says:

    I need to configure the usb driver for internet connection

  5. Brad says:

    How long does it take to get a redistribution license?

  6. Brad says:

    After e-mailing twice without a response,

  7. Steff says:

    Before you start this lengthy process, here is something that isn’t mentioned:

    After we signed an NDA which was required as prerequisite before receiving the MRLA, we were told that also a "Microsoft Services Partner Advantage agreement" is required before the MRLA can be signed. As far as i know this is quite expensive.

    This is where we stopped considerations to use WWSAPI.

  8. anon says:

    Very disappointed. Kenny Kerr also expresses his dissatisfaction here: But MS can still change this.

  9. Bill Emerson says:

    We had plans to use this technology until we discovered the license problems and the the lack of basic GZIP support in the API.

    Those issues basically make usage a total non-starter. I agree with the comment above: Why put so many obstacles in the way of adoption ?

  10. Kevin says:

    Its appears that the only way to get the WWSAPI, webservices.dll, redistributable from Microsoft for non-Windows 7 operating systems is to pay $37,000 to join the Microsoft MSPA program.  I would have thought that being an ISV Certified Partner would have been enough.  It’s just too bad because I really wanted this to work.

  11. MR says:

    MASSIVELY DISAPPOINTING to see MS kill yet another promising technology with such absurd requirements.

    I went back and forth with MS lawyers for nearly two months before they told me I needed the support agreement to proceed. No way my small company can afford such, so it’s dead in the water.

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