---
title: APM Agent SDK licenses
source: https://docs.newrelic.com/docs/licenses/product-or-service-licenses/new-relic-apm/apm-agent-sdk-licenses
---

We love open-source software, and use the following in the New Relic APM Agent SDK. Thank you, open-source community, for making these fine tools! Some of these are listed under multiple software licenses, and in that case we have listed the license we've chosen to use.

| **Library**                                             | **License**                                                                            |
| ------------------------------------------------------- | -------------------------------------------------------------------------------------- |
| [Boost C++](http://www.boost.org)                       | [Boost Software](http://www.boost.org/LICENSE_1_0.txt)                                 |
| [curl](http://curl.haxx.se/)                            | [Curl (MIT/X Style)](http://curl.haxx.se/docs/copyright.html)                          |
| [libjson](http://sourceforge.net/projects/libjson/)     | [libjson (BSD-2 Style)](https://github.com/GerHobbelt/libjson/blob/master/License.txt) |
| [log4cplus](http://sourceforge.net/projects/log4cplus/) | [Apache Version 2.0](http://www.apache.org/licenses/LICENSE-2.0)                       |
| [OpenSSL](http://www.openssl.org)                       | [OpenSSL (BSD Style)](http://www.openssl.org/source/license.html)                      |
| [zlib](http://www.zlib.net)                             | [zlib](http://www.zlib.net/zlib_license.html)                                          |

The remainder of the code is covered by the New Relic License agreement found in the LICENSE file in the distribution.