# Limitations

Keep in mind that this is not an exhaustive collection of the limitations of Azle or [ICP](https://internetcomputer.org/).

Let's discuss some important limitations of Azle and ICP that you are likely to run into:

-   `/api` can't be used locally
-   instruction limit
-   Message size limit
-   heap limit
-   http outcalls request and response size, latency, and expense
-   1_000 update calls per sec
-   30_000 query calls per sec
-   stable memory limit
-   no chunked http responses
-   Wasm binary limits
