Pyth Core Upgrade | Pyth Developer Hub

Pyth Network is upgrading Pyth Core on July 31, 2026. This upgrade replaces Pyth Core's underlying data infrastructure with an improved version while preserving the existing Hermes API surface and on-chain contract interface.

What you get

Higher-frequency updates for faster price moves.
Additional price feeds beyond the current Core catalog.
Lower latency across the data path.

Existing integrations keep working through the cutover. The one new requirement is authentication on Hermes: every Hermes user needs a Pyth API Key by July 31, 2026.

Next steps

Prepare for the upgrade

Step-by-step migration guide before the July 31 cutover.

See the upgraded contract addresses

Per-chain addresses for the upgraded Pyth Core contract.

Learn how the upgrade works

Technical details on signers, data flow, and contract behavior.