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The Signing API lets you sign arbitrary messages and EIP-712 typed data from a Blockradar wallet or child address. This is used for authentication flows, permit-style approvals, and off-chain agreement signing.

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What you can do

  • Sign a plain message from a master wallet or child address
  • Sign EIP-712 structured typed data for standards-compliant workflows

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Endpoints

MethodEndpointDescription
POST/wallets/{walletId}/sign/messageSign a message (master wallet)
POST/wallets/{walletId}/sign/typed-dataSign EIP-712 typed data (master wallet)
POST/wallets/{walletId}/addresses/{addressId}/sign/messageSign a message (child address)
POST/wallets/{walletId}/addresses/{addressId}/sign/typed-dataSign EIP-712 typed data (child address)

Full API Reference

View all signing endpoints in the API Reference tab.