Get SIWE challenge message

curl --request POST \
  --url https://api.0xarchive.io/v1/auth/web3/challenge \
  --header 'Content-Type: application/json' \
  --data '
{
  "address": "0x742d35Cc6634C0532925a3b844Bc9e7595f2bD18"
}
'

{
  "message": "<string>",
  "nonce": "<string>"
}

POST

https://api.0xarchive.io

auth

web3

challenge

Get SIWE challenge message

curl --request POST \
  --url https://api.0xarchive.io/v1/auth/web3/challenge \
  --header 'Content-Type: application/json' \
  --data '
{
  "address": "0x742d35Cc6634C0532925a3b844Bc9e7595f2bD18"
}
'

{
  "message": "<string>",
  "nonce": "<string>"
}

Body

application/json

address

string

required

Ethereum wallet address

Example:

"0x742d35Cc6634C0532925a3b844Bc9e7595f2bD18"

Response

SIWE challenge message

message

string

SIWE message to sign with personal_sign (EIP-191)

nonce

string

Single-use nonce (expires after 10 minutes)

Last modified on June 27, 2026

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