# Blocky Attestation Service Limitations

To ensure Blocky Attestation Services (Blocky AS) availability and
responsiveness for all our
users, we place certain limitations on its usage. We list these limitations
below. If you have questions, or think these are insufficient for your
application, please reach out to us
at [info@blocky.rocks](mailto:info@blocky.rocks).

* Overall service limits:
  * API invocation rate: up to 5 Blocky-AS API calls per second. Keep in mind that
some Blocky AS CLI commands make multiple Blocky AS API calls, which count
against this limit.
  * Monthly API invocations: Restricted by your API plan
* `attest-fn-call` command limits:
  * Request body size: 5 MB.  This body includes the WASM file, input,
and secret input.
  * WASM runtime: for each function invocation, you are provided a new
runtime with the following limits:
    * Duration: 10s
    * Memory: 5 MB
    * Input + Output: 5 MB
    * Max HTTP request size: 500 KB
    * Max HTTP response size:  5 MB