Every route of the free market-data API and the paper-trading Bot API, from the OpenAPI document the servers ship. Market data needs no key; paper trading needs a free key from the guide, pasted into the Authorization box to try calls here.
The interactive viewer did not load. The specification itself is here:
GET https://marginpad.io/api/openapi.json
Import that URL into Postman, Insomnia or any OpenAPI tool.