Thanks! Right now we only have a couple tools live, but you can run kraken2 by following the quick start and signing up for an API key. The API key comes with 10GB of free data analysis. Cost is not yet finalized, but will be on the order of ~$1/GB for a tool like kraken2.
Quick start: https://toolchest-python-client.readthedocs.io/en/latest/
Airtable for signing up and receiving an API key: https://airtable.com/shrKzQNuDHrGkEAI2