Deposit Event

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

string

required

Always "deposit".

number

required

Block timestamp in Unix milliseconds.

object

required

Show data fields

string

required

Transaction hash.

number

required

Block number.

number

required

Log index within the transaction.

number

required

Block timestamp in Unix milliseconds.

string

required

Sender address.

string

required

Receiver address.

number

required

USDC amount (6 decimal precision).

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

Real-time Streaming

Event Reference

Perps Streaming

More

Fields

Use cases

​Fields

​Use cases

Fields

Use cases