Plecos is a Python tool to check metadata (a JSON file) to see if it conforms to the [OEP8 schema](https://github.com/oceanprotocol/OEPs/tree/master/8). Plecos wraps the [jsonschema](https://github.com/Julian/jsonschema) validator. Users can use Plecos to check their metadata before sending it to an Aquarius instance. Aquarius can also use it to check metadata. Plecos can be found in [the Plecos repository on GitHub](https://github.com/oceanprotocol/plecos) and as [a Python package in PyPI](https://pypi.org/project/plecos/).
Plecos can be used in a microservice to facilitate data onboarding, as described in the [plecos_service repository](https://github.com/oceanprotocol/plecos_service).