Pyth Network’s API overhaul threatens to freeze unpatched smart contracts across 300 DeFi protocols

Crypto price oracle Pyth Network missed its documented 16:00 UTC cutover deadline on Aug. 26, adding a new requirement for developers who call its Hermes price-delivery service directly: their requests now need an API key.

Under Pyth's migration guide, people who use a protocol that already integrates the oracle don't need to take direct action.

Pyth documented that the existing hermes.pyth.network address would redirect to its upgraded backend, with authentication required after the deadline. Developers could also move directly tohttps://pyth.dourolabs.app/hermes, passing the key as a bearer token or SDK access token.

Pyth said the routes and response shapes did not change.

Where incomplete Pyth migrations can fail

Pyth's upgraded Hermes endpoint serves payloads intended for the upgraded Pyth Core contract. The guide warns that changing the endpoint without changing the contract generation, or doing the reverse, can leave an application unable to verify price updates.

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