post https://api-sandbox.pismolabs.io/pix-dict/v2/pix/keys/validate
Validates a key locally (if PISMO holds the ownership of it) or directly in DICT (for external keys) It returns related information along with the end_to_end_id you are required to pass to start a Pix transaction with the Perform pix-out transfer endpoint.
This call should only be used to initate a payment, it does not return key information.