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Room ID: polymarket_trades
Endpoint: wss://api.struct.to/ws
Rate: 0.002 credits per message
Stream real-time Polymarket trades as they happen. All filters are optional, and if none are provided the room auto-subscribes to every trade.

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Subscribe

All filters are optional. You can combine multiple filters to narrow the stream. A maximum of 500 total filters is allowed per client. If all filters are empty and subscribe_all is false, the room automatically subscribes to all trades.

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Filters

FilterTypeRequiredDescription
condition_idsstring[]NoFilter by market condition IDs
market_slugsstring[]NoFilter by market slug
event_slugsstring[]NoFilter by event slug
position_idsstring[]NoFilter by outcome token IDs
tradersstring[]NoFilter by wallet addresses (lowercase 0x-prefixed)
trade_typesstring[]NoFilter by trade type: OrderFilled, OrdersMatched, Redemption, Merge, Split, etc.
statusstringNoOne of confirmed (default), pending, or all
subscribe_allbooleanNoSubscribe to every trade with no filters

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Example

{
  "type": "join_room",
  "payload": {
    "room_id": "polymarket_trades"
  }
}

{
  "type": "room_message",
  "payload": {
    "room_id": "polymarket_trades",
    "message": {
      "action": "subscribe",
      "condition_ids": ["0xabc123..."]
    }
  }
}

​
Response

{
  "type": "trade_stream_subscribe_response",
  "room_id": "polymarket_trades",
  "data": {
    "condition_ids": ["0xabc123..."],
    "market_slugs": [],
    "event_slugs": [],
    "position_ids": [],
    "traders": [],
    "trade_types": [],
    "rejected": []
  }
}

​
Events

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trade_stream_update

The payload is a discriminated union based on the trade_type field. Each variant includes different fields. Below is an example of the most common type, OrderFilled.

​
OrderFilled / OrdersMatched

{
  "type": "trade_stream_update",
  "room_id": "polymarket_trades",
  "status": "confirmed",
  "data": {
    "trade_type": "OrderFilled",
    "id": "0xabc123def456",
    "hash": "0xdeadbeef1234567890",
    "block": 65000000,
    "confirmed_at": 1743500000,
    "log_index": 42,
    "block_index": 3,
    "trader": {
      "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
      "name": null,
      "pseudonym": "vitalik.eth",
      "profile_image": null,
      "x_username": null,
      "verified_badge": false
    },
    "taker": "0x1234567890abcdef1234567890abcdef12345678",
    "side": "Buy",
    "condition_id": "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
    "position_id": "12345678901234567",
    "outcome": "Yes",
    "outcome_index": 0,
    "slug": "will-bitcoin-hit-100k",
    "event_slug": "bitcoin-price-markets",
    "usd_amount": 1500.50,
    "shares_amount": 2307.69,
    "price": 0.65,
    "probability": 0.65,
    "fee": 3.0,
    "fee_shares": 4.62,
    "fee_pct": 0.002,
    "exchange": "NegRiskExchange"
  }
}

​
Redemption

{
  "type": "trade_stream_update",
  "room_id": "polymarket_trades",
  "status": "confirmed",
  "data": {
    "trade_type": "Redemption",
    "id": "0xredeem123",
    "hash": "0xredeemhash",
    "block": 65000100,
    "confirmed_at": 1743500100,
    "trader": {
      "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
      "name": null,
      "pseudonym": "vitalik.eth",
      "profile_image": null,
      "x_username": null,
      "verified_badge": false
    },
    "condition_id": "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
    "outcome": "Yes",
    "outcome_index": 0,
    "usd_amount": 1000.0,
    "winning_outcome_index": 0,
    "position_details": [
      { "position_id": "12345678901234567", "outcome_index": 0, "outcome": "Yes", "amount": "1000" }
    ],
    "exchange": "NegRiskExchange"
  }
}

​
Merge

{
  "type": "trade_stream_update",
  "room_id": "polymarket_trades",
  "status": "confirmed",
  "data": {
    "trade_type": "Merge",
    "id": "0xmerge123",
    "hash": "0xmergehash",
    "block": 65000200,
    "confirmed_at": 1743500200,
    "trader": {
      "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
      "name": null,
      "pseudonym": "vitalik.eth",
      "profile_image": null,
      "x_username": null,
      "verified_badge": false
    },
    "condition_id": "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
    "usd_amount": 500.0,
    "position_details": [
      { "position_id": "12345678901234567", "outcome_index": 0, "outcome": "Yes", "amount": "500" },
      { "position_id": "98765432109876543", "outcome_index": 1, "outcome": "No", "amount": "500" }
    ],
    "exchange": "NegRiskExchange"
  }
}

​
Split

{
  "type": "trade_stream_update",
  "room_id": "polymarket_trades",
  "status": "confirmed",
  "data": {
    "trade_type": "Split",
    "id": "0xsplit123",
    "hash": "0xsplithash",
    "block": 65000300,
    "confirmed_at": 1743500300,
    "trader": {
      "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
      "name": null,
      "pseudonym": "vitalik.eth",
      "profile_image": null,
      "x_username": null,
      "verified_badge": false
    },
    "condition_id": "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
    "usd_amount": 750.0,
    "position_details": [
      { "position_id": "12345678901234567", "outcome_index": 0, "outcome": "Yes", "amount": "750" },
      { "position_id": "98765432109876543", "outcome_index": 1, "outcome": "No", "amount": "750" }
    ],
    "exchange": "NegRiskExchange"
  }
}

​
PositionsConverted

{
  "type": "trade_stream_update",
  "room_id": "polymarket_trades",
  "status": "confirmed",
  "data": {
    "trade_type": "PositionsConverted",
    "id": "0xconvert123",
    "hash": "0xconverthash",
    "block": 65000400,
    "confirmed_at": 1743500400,
    "trader": {
      "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
      "name": null,
      "pseudonym": "vitalik.eth",
      "profile_image": null,
      "x_username": null,
      "verified_badge": false
    },
    "market_id": "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
    "index_set": "3",
    "shares_amount": 200.0,
    "exchange": "NegRiskExchange"
  }
}

​
Cancelled

{
  "type": "trade_stream_update",
  "room_id": "polymarket_trades",
  "status": "confirmed",
  "data": {
    "trade_type": "Cancelled",
    "id": "0xcancel123",
    "hash": "0xcancelhash",
    "block": 65000500,
    "confirmed_at": 1743500500,
    "order_hash": "0xorderhash123",
    "exchange": "NegRiskExchange"
  }
}

​
Oracle Lifecycle

Covers Initialization, Proposal, Dispute, Settled, Resolution, ConditionResolution, Reset, Flag, Unflag, Pause, Unpause, ManualResolution, and NegRiskOutcomeReported. 
{
  "type": "trade_stream_update",
  "room_id": "polymarket_trades",
  "status": "confirmed",
  "data": {
    "trade_type": "Resolution",
    "id": "0xoracle123",
    "hash": "0xoraclehash",
    "block": 65000600,
    "confirmed_at": 1743500600,
    "oracle_contract": "0xoraclecontract",
    "condition_id": "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
    "slug": "will-bitcoin-hit-100k",
    "assertion_id": "0xassertion123",
    "settled_price": 1,
    "settlement_resolution": true
  }
}

​
RegisterToken

{
  "type": "trade_stream_update",
  "room_id": "polymarket_trades",
  "status": "confirmed",
  "data": {
    "trade_type": "RegisterToken",
    "id": "0xregtoken123",
    "hash": "0xregtokenhash",
    "block": 65000700,
    "confirmed_at": 1743500700,
    "condition_id": "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
    "token0": "0xtoken0address",
    "token1": "0xtoken1address",
    "exchange": "NegRiskExchange"
  }
}

​
Approval

{
  "type": "trade_stream_update",
  "room_id": "polymarket_trades",
  "status": "confirmed",
  "data": {
    "trade_type": "Approval",
    "id": "0xapproval123",
    "hash": "0xapprovalhash",
    "block": 65000800,
    "confirmed_at": 1743500800,
    "trader": {
      "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
      "name": null,
      "pseudonym": "vitalik.eth",
      "profile_image": null,
      "x_username": null,
      "verified_badge": false
    },
    "operator": "0xoperatoraddress",
    "approved": true,
    "exchange": "NegRiskExchange"
  }
}
Pending trades: Fields unavailable from mempool (block, confirmed_at, log_index, block_index, order_hash, taker, fee, fee_shares, fee_pct) are omitted. received_at (Unix milliseconds) is included instead.
Last modified on April 13, 2026