# JSON parsing error in X-MSYS-API

**URL:** <https://meta.discourse.org/t/json-parsing-error-in-x-msys-api/52395>\
**Category:** Product Support\
**Created:** [2 نوفمبر 2016، 8:24م UTC](https://meta.discourse.org/t/json-parsing-error-in-x-msys-api/52395 "2016-11-02T20:24:39Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![zogstrip](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/zogstrip/32/512781_2.png) [@zogstrip](https://meta.discourse.org/u/zogstrip)\
**Post date:** [2 نوفمبر 2016، 10:22م UTC](https://meta.discourse.org/t/json-parsing-error-in-x-msys-api/52395/5 "2016-11-02T22:22:15Z")

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Yeah. It’s the header we use to send SparkPost the message\_id in case we get a bounce.

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