Important Reminder: Upcoming Deprecation of Mumbai Testnet

Samina Kabir

This changelog serves as a reminder that, as previously announced, Polygon’s Mumbai testnet will be deprecated effective April 8, 2024. This change will affect thirdweb’s product and services including SDK, Paymaster, Embedded Wallet, contracts, and any other products utilizing the Mumbai testnet.

What This Means for You:

  • Unable to deploy contracts After the deprecation date, you will no longer be able to deploy contracts on Mumbai.
  • Unable to interact with contracts: Interaction with any contracts deployed to will no longer be supported via dashboard, SDKs, or any other interfaces.
  • Disruption to any infrastructure services: Account abstraction infrastructure including Bundler / Paymaster and Embedded Wallets for Mumbai will no longer be supported.


Why is Mumbai being deprecated?

Learn more about the reasons for deprecation from the Introducing the Amoy Testnet for Polygon PoS post.

Which testnet should I use?

We encourage users to deploy any contracts to the new Polygon Amoy Testnet which has improved scalability and lower gas fees

Chain Information:

What will happen to my deployed contracts?

Contracts deployed to Mumbai will no longer be upheld on the network meaning users cannot interact with the contract. These contracts will be marked as deprecated through thirdweb’s dashboard.

How long do I have till services are completely stopped?

We will be officially stopping support on April 8th 12:00 AM PST

Support During the Transition

We understand that change can be challenging, and we are here to support you every step of the way. Should you have any questions or need further clarification, please do not hesitate to visit our support site and submit a ticket.

Thank you for your continued support!