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POST
Creates an EIP-4361 SIWE challenge for a wallet address and chain.
  • Auth: none
  • Rate limit tier: Tier 2
  • Origin policy: request must come from an allowlisted origin/host
Common error responses:
  • 400 when chainId is invalid, unsupported, or missing SIWE RPC configuration (JSON_RPC_URL_<chainId>)
  • 400 for malformed request payload or SIWE input mismatch
  • 403 when request origin/host is not allowlisted for SIWE