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POST
/
v1
/
auth
/
get-message
Get Message
curl --request POST \
  --url https://api.example.com/v1/auth/get-message \
  --header 'Content-Type: application/json' \
  --data '
{
  "walletAddress": "<string>"
}
'
{
  "success": true,
  "challenge": {
    "message": "<string>",
    "extraData": "<string>"
  }
}

​
Overview

Request a challenge message that you’ll sign with your wallet to authenticate. The challenge includes an HMAC that expires after 1 minute, so you should sign and submit it promptly.

​
Request Body

​
walletAddress
string
required
Your wallet’s EOA address (e.g., 0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb)

​
Response

​
success
boolean
Always true for successful requests
​
challenge
object
The challenge object containing the message to sign
{
  "success": true,
  "challenge": {
    "message": "Sign into prediction market swaps by MoonPay.\n       \n      WARNING: do not sign this message on any other site.\n    \n      Challenge: a1b2c3d4e5f6...",
    "extraData": "{\"walletAddress\":\"0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb\",\"expiresOn\":\"2024-01-15T10:01:00.000Z\",\"hmac\":\"a1b2c3d4e5f6...\"}"
  }
}