Fetch the login message to sign

POST/api/v1/auth/noncePublic

Trading APIprice E4 · size E2 · amount E6 (integers)YES | NO

The server generates the nonce together with the complete message to sign (message). Hand message to the wallet's signPersonalMessage exactly as received — do not assemble the login message yourself; verification runs against the original text.

Request body

addressstringrequired
Sui wallet address
Example"0x3f1a9c2e7b4…a7b8c9d0e1f"

Response

200The message to sign is ready

noncestring
One-time nonce
Example"n_8f3a2c1d9e7b"
messagestring
The complete message generated by the server; hand it to the wallet for signing exactly as received
Example"InfoFlow want…i account …"
expiresAtint64
Epoch milliseconds
Example1758240000000

Switch status codes in the response example to view errors. For all codes, see the Errors page.

Request

curl -X POST "$BASE_URL/api/v1/auth/nonce" \
  -H "Content-Type: application/json" \
  -d '{
    "address": "0x3f1a9c2e7b4d5e6f8a9b0c1d2e3f4a5b6c7d8e9f0a1b2c3d4e5f6a7b8c9d0e1f"
  }'

Response

The message to sign is ready

{
  "nonce": "n_8f3a2c1d9e7b",
  "message": "InfoFlow wants you to sign in with your Sui account …",
  "expiresAt": 1758240000000
}