# Base actions

- [Check x-api-signature](/english-2/api-reference/01base_actions/post_test-signature.md)
- [Fetch available currencies](/english-2/api-reference/01base_actions/post_available-currencies.md)
- [Current price request](/english-2/api-reference/01base_actions/post_price-rate.md)
- [Search for operations by TX hash](/english-2/api-reference/01base_actions/post_find-tx.md)
- [Check address format](/english-2/api-reference/01base_actions/post_validate-address.md)
- [Get transaction history](/english-2/api-reference/01base_actions/post_get-transaction-history.md)