Overview
New to gasless transactions? See About the Fireblocks Gasless Service in the Help Center for a product introduction, then use these guides for the API behavior. Gasless transactions let a vault account send tokens without holding the chain’s native asset. The vault account signs the transfer, and a separate relay vault account pays the network fee. You never fund the sending vault accounts with gas, which removes the top-up step that Gas Station otherwise automates. Once your workspace is configured, gasless is applied automatically to eligible transactions. You submit a standard Create a new transaction request; no gasless-specific endpoint exists. Configuration happens in the Console only. The public API has no endpoint to set up relays.Choose a mechanism
Fireblocks uses a different mechanism on each chain family.EVM and Solana at a glance
The two chain families use different mechanisms, so their setup differs.What gasless does not cover
- Native assets. No mechanism relays the chain’s base asset. To move ETH, SOL, or another base asset, the source vault account pays its own fee. Use Gas Station to keep those vault accounts funded.
- API configuration. Relays, fee payers, and modes are set in the Console, not through the public API.
Related
- EVM Gasless (Universal Gasless): set up and send gasless transactions on EVM chains.
- Solana Gasless: set up a fee payer and send SPL tokens without SOL.
- Work with Gas Station: keep native-asset balances funded for transactions gasless does not cover.