Tenderly Fork Customization API
Forks will be deprecated on March 31, 2025.
Please migrate to Tenderly Virtual TestNets or contact our support for assistance with automatic migration.
New projects on Tenderly should use Virtual TestNets.
New projects on Tenderly should use Virtual TestNets.
The guides below show how to customize transaction simulations and (forked) networks in various aspects.
How to revert transactions on a Fork (a.k.a. “Timemachine”):
How to increase time on your Fork before simulating a transaction:
How to increase the block number on your Fork before simulating a transaction:
How to specify Chain ID, different from the network you forked:
How to specify parameters for your simulations:
How to simulate sending a transaction from an arbitrary address:
How to manage account balances in Tenderly Forks:
How to change storage values on a Fork: