title: Lync Server 2013 SDK documentation TOCTitle: Lync Server 2013 SDK documentation ms:assetid: 3ca7044b-e351-45ef-af87-a93245ba39fa ms:mtpsurl: https://msdn.microsoft.com/library/Dn454964(v=office.15) ms:contentKeyID: 57260571 ms.date: 07/24/2014 mtps_version: v=office.15
The Microsoft Lync Server 2013 SDK includes the Microsoft Lync Server 2013 SIP Application API documentation, library (ServerAgent.DLL), application development tools, and sample applications.
Applies to: Lync 2013 | Lync Server 2013
The Lync Server 2013 SDK includes three Lync Server 2013 SIP Application API references that can be used to create Session Initiation Protocol (SIP) server applications that customize and extend the functionality of Microsoft Lync Server 2013:
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SIP application manifest
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Microsoft SIP Processing Language (MSPL)
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Microsoft.Rtc.Sip namespace
This SDK is intended for the following audiences:
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Developers who want to use application manifests and MSPL scripts to implement simple custom SIP message filtering and routing on computers in a Lync Server 2013 deployment.
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Experienced SIP developers who want to create SIP-based managed code server applications that implement real-time content delivery or instant messaging infrastructure. This includes applications that work directly with SIP transaction objects or support multithreaded transactions.