August 13, 2026

Wallets

Solana

• Improved Solana paymaster transaction submission reliability by no longer pinning sendTransaction to the paymaster's simulation slot.
• Added an opt-in rollout for rent-prefund simulation against confirmed Solana state, reducing failures caused by stale account data.
• Clarified alchemy_requestFeePayer guidance: simulationSlot is intended for paymaster simulation only and should not be reused when submitting the transaction, helping integrators avoid stale-state failures.

Developer Experience

Dashboard

• API key rotation is now generally available in the Alchemy Dashboard. Rotate an existing app's API key from App Settings without changing the app itself — settings, history, and usage data are preserved, and the previous key stops working within 2 minutes. See How to Rotate API Keys for the full walkthrough.

Node

Upgrades

• Gnosis Chiado: nethermind 1.39.3
• Gnosis Mainnet: nethermind 1.39.3
• Pharos Atlantic: pharos pharos_community_v0.14.4_05cffaf0_0729
• Rootstock Mainnet: rsk VETIVER-9.0.4
• Sei Mainnet: Seid v6.6.1
• Story Mainnet: geth v1.2.3
• Superseed Sepolia: op-reth v2.1.2, op-node v1.19.3