You can restrict requests to specific TronGrid methods through your API Key. If the list is not empty, any unspecified method calls on it will be rejected.
Example:
Allowlist entry: walletsolidity_getTransactionById
Request:
curl --request GET \
--url https://api.trongrid.io/v1/accounts/TUD4YXYdj2t1gP5th3A7t97mx1AUmrrQRt \
--header 'TRON-PRO-API-KEY: 25f66928-0b70-48cd-9ac6-da6f8247c663' \
Result: Request is rejected, because the method is not walletsolidity_getTransactionById.