/v1/config/spec

Retrieve the specification configuration used on this node.
The configuration includes: - Constants for all hard forks known by the beacon node (e.g. Phase0, Altair, Bellatrix, Capella, Deneb, Electra, etc.) - Presets for hard forks supplied to the node - Mainnet or testnet specific configuration values
Format rules: - Any value starting with 0x is returned as a hex string. - Numeric values are returned as a quoted integer.