gm Pythians,
The Pyth Core upgrade date has been moved to August 18, 2026 (from July 31st, 2026).
This gives Pyth Core users more time to prepare their integrations for the upgraded infrastructure described here: Preparing for the Pyth Core upgrade | Pyth Developer Hub
Since the original announcement, new chains have been supported with more to come. Please refer to the Pyth Network Documentation.
What is changing
Pyth Core is being upgraded from the current Pythnet-backed infrastructure to the upgraded Pyth Core stack.
The new cutover date is: August 18, 2026
At the cutover, the Pyth DAO will upgrade the on-chain Pyth Core contracts, and Hermes requests will be redirected to the upgraded backend automatically.
What users need to do
If your application calls Hermes directly, you will need a Pyth API key by August 18, 2026.
You can get access through Pyth Terminal: Explore - Pyth Terminal
If your application also uses Pyth Core contracts on-chain, you have two paths:
- Early upgrade
Switch to the upgraded Hermes endpoint and upgraded Pyth Core contract before the cutover.
- Wait for the automatic upgrade
The DAO will upgrade the existing Pyth Core contract at cutover. Your integration should still add API key authentication for Hermes before August 18.
Important note for Sui users
The automatic upgrade path does not apply to Sui integrations. Sui applications reference the Pyth package by object ID, so Sui consumers need to upgrade manually.
Please follow the Sui-specific upgrade guide in the docs.