Deposit Event

USDC and PolyUSD deposits and withdrawals on Polymarket.

Emitted when USDC.e or PolyUSD moves into or out of Polymarket contracts — deposits (funding a trading account) and withdrawals.

V2 update: Polymarket V2 uses PolyUSD (a 1:1 USDC.e wrapper) as collateral. Deposit events now include PolyUSD wrapping (USDC.e → PolyUSD via Onramp) and unwrapping (PolyUSD → USDC.e via Offramp). The event format is identical — amount is in USD with 6 decimal precision regardless of whether the underlying transfer is USDC.e or PolyUSD. See the V2 Migration Guide for details.

{
  "type": "deposit",
  "timestamp": 1774515147000,
  "data": {
    "event_type": "deposit",
    "tx_hash": "0x4ec78046c86dc95e432ad938185dfff4f72644d1c4328483b6a1bcbd024e9d5c",
    "block_number": 84697556,
    "log_index": 2150,
    "timestamp": 1774515147000,
    "from": "0x53a26c4ee0776948f9fc645a6e5184f1af3deb92",
    "to": "0x4bfb41d5b3570defd03c39a9a4d8de6bd8b8982e",
    "amount": 27.489,
    "direction": "deposit"
  }
}

Fields

type · string · required

Always "deposit".

timestamp · number · required

Block timestamp in Unix milliseconds.

data · object · required

Show data fields

tx_hash · string · required

Transaction hash.

block_number · number · required

Block number.

log_index · number · required

Log index within the transaction.

timestamp · number · required

Block timestamp in Unix milliseconds.

from · string · required

Sender address.

to · string · required

Receiver address.

amount · number · required

USDC amount (6 decimal precision).

direction · string · required

"deposit" (to Polymarket) or "withdrawal" (from Polymarket).

Use cases

• Whale tracking — large deposits often precede big trades
• Fund flow analysis — track capital entering and leaving Polymarket
• Wallet monitoring — know when a tracked wallet funds their account