# Billwerk API **URL:** \ **Category:** Beginner Questions\ **Created:** [August 2, 2023, 8:35am UTC](https://community.make.com/t/billwerk-api/13876 "2023-08-02T08:35:28Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Jens](https://avatars.discourse-cdn.com/v4/letter/j/d2c977/32.png) [@Jens](https://community.make.com/u/Jens)\ **Post date:** [August 2, 2023, 8:35am UTC](https://community.make.com/t/billwerk-api/13876/1 "2023-08-02T08:35:28Z")
Hey everyone, I want to connect a new tool via API, but I rech my limits. Does someone know how I can connect this API? [https://developer.billwerk.io/docs/restApi/authentication](https://developer.billwerk.io/docs/restApi/authentication) [https://swagger.billwerk.io/](https://swagger.billwerk.io/) Hope someone can help me! 🙂 ---
**Author:** ![Raj\_Bajaj](https://dub1.discourse-cdn.com/flex013/user_avatar/community.make.com/raj_bajaj/32/16864_2.png) [@Raj\_Bajaj](https://community.make.com/u/Raj_Bajaj)\ **Post date:** [October 31, 2023, 2:38am UTC](https://community.make.com/t/billwerk-api/13876/3 "2023-10-31T02:38:08Z")
Hello, Billwerk appears to use OAuth, so [Make an OAuth 2.0 request](https://www.make.com/en/help/tools/http#make-an-oauth-2-0-request) module should be helpful and an app request can be submitted via [Idea Exchange](https://www.make.com/en/app-ideas/). If you are seeing 429 [rate limits](https://developer.billwerk.io/docs/restApi/rateLimiting), [Sleep](https://www.make.com/en/help/tools/tools#sleep) can help avoid it by adding delay of few seconds upto a maximum of 300 seconds. Hope this help, Thanks. ---
**Author:** ![Make\_Bot](https://dub1.discourse-cdn.com/flex013/user_avatar/community.make.com/make_bot/32/14661_2.png) [@Make\_Bot](https://community.make.com/u/Make_Bot)\ **Post date:** [January 29, 2024, 2:42am UTC](https://community.make.com/t/billwerk-api/13876/4 "2024-01-29T02:42:06Z")