Currently live on Ethereum, Polygon, Solana, Optimism, Arbitrum, Avalanche, Gnosis, Flow, and testnets

The webhook API is similar to the existing SimpleHash API, each having a separate endpoint for managing webhooks for Mainnetand Testnet chain events.


Webhooks for Mainnet chains are called from the regular API domain at while testnet chains are called from Each endpoint functions in the same manner for both the mainnet and testnet environments.


All webhook API endpoints require use of an API Key. See for details.