# Interest in a Siemens S7-WebAPI driver? **URL:** \ **Category:** 3rd Party Modules\ **Created:** [August 6, 2026, 7:23am UTC](https://forum.inductiveautomation.com/t/interest-in-a-siemens-s7-webapi-driver/116682 "2026-08-06T07:23:36Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![christofer.dutz](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/christofer.dutz/32/76634_2.png) [@christofer.dutz](https://forum.inductiveautomation.com/u/christofer.dutz)\ **Post date:** [August 6, 2026, 7:23am UTC](https://forum.inductiveautomation.com/t/interest-in-a-siemens-s7-webapi-driver/116682/1 "2026-08-06T07:23:36Z")
Hi all, While working on an article series on the Siemens S7 PLC supported protocols and a deep-dive in the security settings of these, I was curious about the Siemens S7-WebAPI protocol and instead of guessing, I built a driver for it ... What I like about it: It's HTTPS fully authenticated and the full permission schema of the S7 applies to it. You can for example have a read-only user, which for OPC-UA, S7 or S7+ I am not able to do. It's as far as I can tell at least equally secure to OPC-UA, a lot more secure than S7 and S7+, it's on board every S7 PLC that supports TLS secure S7+ (TIA Portal Version V17 and CPU Firmware-Version V2.9 (S7-1500) or V4.5 (S7-1200)). And it's on there for free. So I've built a fully blown driver around this .... would this be interesting for anyone here to have as an Ignition module? Chris ---
**Author:** ![zxcslo](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/zxcslo/32/61610_2.png) [@zxcslo](https://forum.inductiveautomation.com/u/zxcslo)\ **Post date:** [August 6, 2026, 8:11am UTC](https://forum.inductiveautomation.com/t/interest-in-a-siemens-s7-webapi-driver/116682/2 "2026-08-06T08:11:23Z")
It would be very interesting to see how your driver behaves with 30k+ tags (maybe some benchmarks?). I still use the classic Ignition S7 driver today and I've never had any problems with 30000+ tags on my system (most of them are in 1s tag groups)... In my experience, speed & security don't go together very well... 😇 ---
**Author:** ![christofer.dutz](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/christofer.dutz/32/76634_2.png) [@christofer.dutz](https://forum.inductiveautomation.com/u/christofer.dutz)\ **Post date:** [August 6, 2026, 8:25am UTC](https://forum.inductiveautomation.com/t/interest-in-a-siemens-s7-webapi-driver/116682/3 "2026-08-06T08:25:38Z")
Well ... 30000+ tags I would probably need a few days creating them on my test-bench 😉 I do think for super high volume none of the OPC-UA / WebAPI approches are good ... I would even think that S7+ would be overloaded quite quickly ... S7 is the work-beast for super high throughput, but also without any form of security. So I guess it's always a tradeoff ... security costs performance ... however I would expect the WebAPI to perform better than the OPC-UA interface as the Server implementation must be a lot simpler and simpler means less to do for the CPU. I wrote the driver in order to know what this interface can and can't do ... To me it sounds like a sensible tradeoff between security and performance. And it being on the PLC for free without needing to buy an expensive license for OPC-UA makes me like it even more 😉 S7+ is pretty much a mess ... Siemens completely fu\*\*ed that up in my opinion. You can even see TIA using it in very hacky ways when it's talking to a real device using it. ---
**Author:** ![zxcslo](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/zxcslo/32/61610_2.png) [@zxcslo](https://forum.inductiveautomation.com/u/zxcslo)\ **Post date:** [August 6, 2026, 8:44am UTC](https://forum.inductiveautomation.com/t/interest-in-a-siemens-s7-webapi-driver/116682/4 "2026-08-06T08:44:57Z")
> [@christofer.dutz](#): > > would this be interesting for anyone here to have as an Ignition module? Yes, I would like to try it. 👍 ---
**Author:** ![christofer.dutz](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/christofer.dutz/32/76634_2.png) [@christofer.dutz](https://forum.inductiveautomation.com/u/christofer.dutz)\ **Post date:** [August 6, 2026, 12:59pm UTC](https://forum.inductiveautomation.com/t/interest-in-a-siemens-s7-webapi-driver/116682/5 "2026-08-06T12:59:01Z")
@zxcslo (or anyone else interested) In that case, please contact me via my email [christofer.dutz@toddysoft.com](mailto:christofer.dutz@toddysoft.com) ... we can discuss this there.