# Documentation for writing Custom Protocol **URL:** \ **Category:** Gatling (Open-Source)\ **Created:** [July 30, 2021, 5:16pm UTC](https://community.gatling.io/t/documentation-for-writing-custom-protocol/6208 "2021-07-30T17:16:20Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Preetam\_Shingavi](https://avatars.discourse-cdn.com/v4/letter/p/eb9ed0/32.png) [@Preetam\_Shingavi](https://community.gatling.io/u/Preetam_Shingavi)\ **Post date:** [July 30, 2021, 5:16pm UTC](https://community.gatling.io/t/documentation-for-writing-custom-protocol/6208/1 "2021-07-30T17:16:20Z")
Hello community, Is there any documentation or resources on how to write a custom protocol in gatling ? I came across this lately[https://callistaenterprise.se/blogg/teknik/2016/11/26/gatling-custom-protocol/](https://callistaenterprise.se/blogg/teknik/2016/11/26/gatling-custom-protocol/)but this is specific to aws lambda, I am looking if there is a step wise guide to create custom protocol. Thanks, Preetam ---
**Author:** ![Preetam\_Shingavi](https://avatars.discourse-cdn.com/v4/letter/p/eb9ed0/32.png) [@Preetam\_Shingavi](https://community.gatling.io/u/Preetam_Shingavi)\ **Post date:** [August 2, 2021, 5:25pm UTC](https://community.gatling.io/t/documentation-for-writing-custom-protocol/6208/2 "2021-08-02T17:25:19Z")
Still looking if anyone has more info regarding the above. Thanks in advance! ---
**Author:** ![Preetam\_Shingavi](https://avatars.discourse-cdn.com/v4/letter/p/eb9ed0/32.png) [@Preetam\_Shingavi](https://community.gatling.io/u/Preetam_Shingavi)\ **Post date:** [August 4, 2021, 5:01pm UTC](https://community.gatling.io/t/documentation-for-writing-custom-protocol/6208/3 "2021-08-04T17:01:56Z")
I was able to do a POC with latest gatling version and develop my own protocol for calling AWS Lambda. Will share more details once I have things concrete with correct handling of response and stats in reporting.