Rate limit exceeded

Posts about the simPRO API. Help/support/how-to etc.
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spolacsek
Posts: 52
Joined: Fri Aug 10, 2018 1:33 am

Rate limit exceeded

Post by spolacsek » Wed Apr 16, 2025 5:08 am

Hi There,

As of this afternoon, we are experiencing a whole lot of 429 - Rate Limit Exceeded.

This is not something we have encountered before. Nothing has changed with our system. Has there been a change to the API that would suddenly cause this to occur?

I have throttled our requests to no more than 5 requests per second and I am still encountering the issue...

Any insights would be greatly appreciated.

Many thanks,
Sean
spolacsek
Posts: 52
Joined: Fri Aug 10, 2018 1:33 am

Re: Rate limit exceeded

Post by spolacsek » Wed Apr 16, 2025 11:11 pm

Hi,

This issue is still occurring. Can someone please help with any information.

Thanks.
thomas.duval
Posts: 8
Joined: Mon Jul 22, 2024 11:25 pm

Re: Rate limit exceeded

Post by thomas.duval » Thu Apr 17, 2025 12:51 am

Hi,

There has been an API call limit in place since 2022. You can see the announcement here : viewtopic.php?f=3&t=1876

More information in our documentation : https://developer.simprogroup.com/apid ... a5a61fde9

There was a slight change in the way we enforce that limit recently (shorter check period), but that has not changed the 10 requests per second limit.

I would recommend handling 429 in your logic directly rather than throttling your requests (sleep, queue, etc).

Let me know if you have any more questions.

Thomas
spolacsek
Posts: 52
Joined: Fri Aug 10, 2018 1:33 am

Re: Rate limit exceeded

Post by spolacsek » Thu Apr 17, 2025 1:14 am

Thanks Thomas,

I am aware of the rate limit has been around for some time, but as I stated, this issue had not appeared for us until yesterday.

We went from a fully functioning system to an unusable one, just yesterday.

The slight change you mentioned has had a severe impact. I am able to implement a fix to this but my system will be down now until I can resolve it. Some notice on a change like this would be useful so that we wouldn't be in this situation.
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